Update: Soekarno-Hatta and four other airports reopen overnight — Garuda resumes Jakarta flights in phases from 8 September

Mount Anak Krakatau in the Sunda Strait, on Level III (Siaga) alert since 2 July 2026 with no escalation since, was in continuous lava-fountain eruption from 23:07 WIB on Friday 4 September 2026 — the strongest activity of the year, with satellite-detected ash at roughly 15 km — punctuated by further discrete eruptions at 03:53 and 07:10 WIB on Sunday 6 September, before the continuous phase itself paused at 00:04 WIB on 6 September; Badan Geologi says monitored ash dispersal is continuing regardless. BMKG data as of 04:00 WIB on 6 September showed the low-level ash cluster over parts of DKI Jakarta, Bogor, Depok, Banten and West Java (as far as Bandung the previous evening), with ashfall confirmed on the Serang coast and in Bandar Lampung; Banten's governor and the disaster agencies in Banten and Lampung have asked residents in ashfall areas to wear masks outdoors. Soekarno-Hatta (CGK) has been closed under a series of revised NOTAMs (A3341/26 → A3344/26 → A3346/26 → A3348/26 and further overnight revisions) since 01:30 WIB on 6 September, extended repeatedly — briefly to eight airports on Sunday evening, back to six by Monday morning — as further paper tests kept returning positive; a fresh discrete eruption at 20:23 WIB Sunday night (58 mm amplitude) added to the picture, and the six core airports (Soekarno-Hatta, Halim Perdanakusuma, Radin Inten II, Budiarto, Pondok Cabe and Husein Sastranegara) remained closed into Monday morning, targeted to reopen at 08:59 WIB on 7 September. Conditions are being reassessed every few hours, and the Transport Minister has said reopening timing genuinely depends on BMKG's evolving analysis, not just a clean paper test — treat every reopening estimate here as provisional. Cumulative flight-impact counts have kept climbing: Soekarno-Hatta alone reported 923 flight movements and 119,215 passengers affected by 20:54 WIB Sunday, and Garuda Indonesia has cancelled all its Jakarta/Bandung/Lampung flights into Monday around noon. Volcanologists have stated the rebuilt cone is too small to trigger a tsunami. As of Monday afternoon, one of the eight airports (Atung Bungsu, Pagar Alam) has reopened after a negative paper test, while the remaining seven were extended to 18:00 WIB; InJourney Airports separately reports 2,300 flights and 268,539 passengers affected across its four managed airports since 5 September. By mid-afternoon, Soekarno-Hatta had tested negative for ash four times running, with three more airports also reporting clean results, yet the Transport Minister was still not rushing to reopen, citing a wind-direction reversal — a same-day, seemingly contradictory statement from Soekarno-Hatta's own spokesperson said testing was still positive. By evening, every remaining closed airport (Soekarno-Hatta, Halim, Radin Inten II, Husein Sastranegara, Budiarto, Pondok Cabe and Taufik Kiemas, plus a newly-closed small airport, Salakanagara at Tanjung Lesung) was extended once more, to 23:59 WIB, with the Coordinating Minister citing VAAC data on ash still sitting over Lampung/Banten/Jabodetabek rather than the paper test result. Overnight into Tuesday 8 September, the main closure story resolved: Soekarno-Hatta, Halim Perdanakusuma and Husein Sastranegara reactivated at 00:01 WIB, with Budiarto and Pondok Cabe following at 02:25 WIB, and Garuda Indonesia resuming Jakarta flights in phases from the same moment, each cleared by a fresh safety and airworthiness check. Of the nine airports closed at some point since the weekend, six are now open; Radin Inten II, Taufik Kiemas and Salakanagara remain shut with no confirmed reopening time. Cumulative impact over the multi-day closure stood at roughly 1,558–2,300 flights depending on which airport count is used. This entry is organised as a timeline; further updates will only follow if the remaining airports' status changes materially.

Timeline

1. 2 Jul 2026

   Badan Geologi / PVMBG raises Anak Krakatau to Level III (Siaga) and sets a 3 km exclusion radius around the crater for residents, visitors, fishermen and climbers. More than 240 eruptions are recorded between then and 5 September.

2. Fri 4 Sep, 23:07 WIB

   A continuous eruption begins, with booms and rumbling audible from the Pasauran observation post in Serang and reported across Banten, Lampung and West Java. The seismograph records a single eruption tremor of 70 mm amplitude lasting 21,600 seconds (six hours) — the strongest activity since the alert was raised. PVMBG interprets it as a lava fountain producing lava flows.

3. Sat 5 Sep, 00:50 WIB (02:50 JST)

   The Japan Meteorological Agency reports a large eruption; Himawari-9 satellite imagery puts the plume at roughly 15 km (48,000–50,000 ft) above sea level. At 08:30 JST the JMA confirms that no significant tidal change has been observed at any station in Japan or abroad.

4. Sat 5 Sep, daytime

   PVMBG publishes its release on the continuous eruption: the column cannot be seen from the ground but the glowing fountain is visible continuously, and the cone rebuilt since the December 2018 collapse is still small, with no potential for a collapse that could trigger a tsunami. Thin ashfall is reported on the Serang coast in Banten, where residents complain of stinging eyes and sore throats; ash also reaches Tanggamus in Lampung.

5. Sat 5 Sep, evening

   The Ministry of Transport says operations at Soekarno-Hatta are normal, with no ash detected at the airport, and that monitoring with AirNav Indonesia and BMKG continues. Ash begins settling over parts of Bandar Lampung.

6. Sat 5 Sep, evening–night

   Mask advisories follow the ashfall. BPBD Bandar Lampung tells residents to wear masks and eye protection outdoors, reduce outdoor activity during ashfall, close doors, windows and vents, and cover food and water stocks; South Lampung regency and its health office recommend masks and goggles, and the Lampung provincial government asks residents to stay calm and mask up. Banten Governor Andra Soni asks everyone in affected areas of Banten to wear a mask when leaving home and to keep outside the 3 km radius.

7. Sat 5 Sep, 20:00 WIB

   A BMKG satellite bulletin (data as of 17:00 WIB) reports two ash clusters: one from the surface to roughly 20,000 ft moving southeast-to-south over parts of Banten and West Java — including Bandung — and a second up to 50,000 ft moving southwest-to-northwest over Banten, Lampung, Bengkulu and the southern Sunda Strait.

8. Sat 5 Sep, 22:00 WIB

   Ministry of Transport monitoring: 33 flights at Soekarno-Hatta affected so far — international 16 cancelled, 7 delayed, 5 rescheduled (routes including Singapore, Hong Kong, Sydney, Seoul, Doha, Amsterdam and Kuala Lumpur); domestic 4 cancelled and 1 diverted (Lampung, Denpasar, Surabaya).

9. Sat 5 Sep, 23:27 WIB

   Radin Inten II airport in Lampung (TKG) confirms three Jakarta–Lampung flights cancelled for safety: TransNusa 5205 and 5206 and Lion Air 242.

10. Sun 6 Sep, 00:35–01:05 WIB

    Paper tests at Soekarno-Hatta return positive for volcanic ash.

11. Sun 6 Sep, 01:30 WIB

    Soekarno-Hatta is closed under NOTAM A3341/26, initially until 05:30 WIB — no take-offs or landings during the closure.

12. Sun 6 Sep, 03:53 WIB

    A further discrete eruption is recorded — maximum amplitude 46 mm, duration 30 seconds. The column is not observed, and the eruption is still in progress when Badan Geologi issues the notice.

13. Sun 6 Sep, 04:00 WIB

    BMKG (Himawari-9 imagery with PVMBG and VAAC Darwin data) identifies two ash clusters: one up to 20,000 ft spreading northeast-to-south over parts of DKI Jakarta, Banten and West Java; a second up to 50,000 ft spreading southwest-to-northwest over Lampung, Bengkulu and the southern Sunda Strait.

14. Sun 6 Sep, ~05:20 WIB

    Soekarno-Hatta announces the suspension is extended from 05:30 to 09:30 WIB because of the increased eruption activity. The Directorate General of Civil Aviation says decisions will keep being taken dynamically from field conditions, and that Sunday's schedule recovery will be managed with the knock-on effects on aircraft rotation, fleet availability and terminal capacity in mind.

15. Sun 6 Sep, 06:05–06:35 WIB

    A follow-up paper test at Soekarno-Hatta again returns positive for ash. AirNav Indonesia revises the NOTAM from A3341/26 to A3344/26, keeping the closure in force to 09:30 WIB.

16. Sun 6 Sep, 07:00–08:00 WIB

    Radin Inten II (Lampung, TKG) closes for a first window under an Aerodrome Closed notice; three more domestic flights are cancelled — Garuda Indonesia GA-073 (Lampung–Jakarta) and Citilink QG-904 and QG-905 (Cengkareng–Lampung).

17. Sun 6 Sep, 07:10 WIB

    A second discrete eruption of the morning is recorded — maximum amplitude 50 mm, duration 16 seconds. The ash column is again not observed. Badan Geologi repeats that the public, visitors and climbers should stay out of the 3 km radius.

18. Sun 6 Sep, 07:20 WIB

    Halim Perdanakusuma airport (Jakarta) also closes, under NOTAM A3345/26; AirNav Indonesia estimates it will reopen at 10:00 WIB. Three Jakarta-area airports — Soekarno-Hatta, Halim and Radin Inten II — are now shut at once.

19. Sun 6 Sep, ~08:00 WIB

    Radin Inten II's closure is extended from its original 07:00–08:00 window to 07:00–10:00 WIB (later reissued as NOTAM B1124/26) because ash is still detected in the area.

20. Sun 6 Sep, ~08:05–08:20 WIB

    Cumulative impact updated for Sunday morning: Lukman F. Laisa, Director General of Civil Aviation at the Ministry of Transport, confirms 209 flight movements affected at Soekarno-Hatta (160 domestic, 39 international, 10 cargo) and about 22,798 passengers — well above the 33-flight figure reported the previous evening, which only covered the initial closure window. Domestic Makassar (UPG) and international Singapore (SIN) are the hardest-hit routes. AirNav Indonesia states the closures at all three airports are "emergency mitigation" steps and that ash dispersal is dynamic, so airspace status is being monitored continuously.

21. Sun 6 Sep, ~09:40 WIB

    Soekarno-Hatta's closure is extended a second time — from 09:30 to 13:30 WIB — under NOTAM A3346/26 (replacing A3344/26), AirNav Indonesia citing the continued increase in eruption activity. As of this update, Halim (estimated 10:00 WIB) and Radin Inten II (NOTAM B1124/26, also 10:00 WIB) had not yet had their own reopenings confirmed in reporting.

22. Sun 6 Sep, morning

    Ground reports confirm ashfall reaching Bogor and Depok, West Java — residents in Bojonggede, Cilebut and Tajurhalang (Bogor) and elsewhere in Depok report dust settling on vehicles, phone screens and outdoor surfaces. This sits within the West Java portion of BMKG's low-level ash cluster; BMKG's own satellite analysis has since named Jakarta, Bogor and Depok among the areas covered by that cluster.

23. Sun 6 Sep, 00:04 WIB

    The continuous lava-fountain eruption that began the night before comes to an end. Reported later in the morning, Lana Saria, Head of Badan Geologi, calls the lava-fountain phenomenon characteristic of Anak Krakatau and says monitored ash dispersal is still moving toward Banten, West Java, Jakarta, Lampung and Bengkulu — the 3 km exclusion zone and mask guidance for affected areas stay in force, and the alert level remains Level III (Siaga), unchanged since 2 July.

24. Sun 6 Sep, 09:49–09:55 WIB

    Halim Perdanakusuma's closure is reissued as NOTAM A3347/26 and Radin Inten II's as NOTAM B1125/26, both now estimated to reopen at 14:00 WIB — later than the 10:00 WIB first announced for each.

25. Sun 6 Sep, 10:35 WIB

    The Ministry of Transport's Directorate General of Civil Aviation gives a nationwide tally: 373 flight movements affected in total — 202 at Soekarno-Hatta, 29 at Halim Perdanakusuma, 8 at Radin Inten II, and 277 more across other airports nationwide.

26. Sun 6 Sep, by ~13:48 WIB

    The closure list grows to six airports as ash detections widen: Soekarno-Hatta, Halim Perdanakusuma, Radin Inten II and Budiarto (Curug) are joined by Pondok Cabe and Husein Sastranegara in Bandung (this last one pending its own NOTAM). Transport Minister Dudy Purwagandhi says all six returned a positive paper test and that each closure is estimated at around four hours from when it was announced. Diverted flights are being sent to Kertajati (West Java), Ahmad Yani (Semarang) and Juanda (Surabaya); Jeddah and Madinah flights specifically to Kertajati. Ngurah Rai (Bali) is not closed but reports flights cancelled on the Jakarta route.

27. Sun 6 Sep, 13:23 WIB

    Soekarno-Hatta's closure is extended a third time — from 13:30 to 17:30 WIB — under NOTAM A3348/26 (replacing A3346/26). Transport Minister Dudy Purwagandhi confirms the extension; the Ministry now puts Soekarno-Hatta's own cumulative impact at 202 flight movements (172 cancelled, 18 delayed, 7 postponed, 4 diverted, 1 returned to base) — a different, later count than the 209-movement figure reported the previous evening.

28. Sun 6 Sep, ~13:30 WIB

    A separate Ministry tally puts Soekarno-Hatta's cumulative impact higher, at 301 flight movements (233 domestic, 58 international, 10 cargo) as of the 13:30 checkpoint — a reminder that different releases within the same hour have reported different cumulative counts as data is reconciled; treat exact figures as approximate and directionally rising rather than precise.

29. Sun 6 Sep, 13:55 WIB

    Visiting Soekarno-Hatta in person, Transport Minister Dudy Purwagandhi says the most recent paper test, at 12:00 WIB, was still positive for ash, and that the ministry "cannot yet determine when it will end." He stresses that reopening depends on BMKG's ash-dispersal analysis as conditions evolve, not simply on a clean paper test — signalling the 17:30 WIB estimate from 13:23 WIB is itself uncertain.

30. Sun 6 Sep, 15:20 WIB

    The Ministry of Transport extends the closure again — this time nationwide across all six airports, to 18:00 WIB, superseding the 17:30 WIB estimate for Soekarno-Hatta. Minister Dudy Purwagandhi says the affected-airport count has grown from five to six and puts the nationwide cumulative impact at that point at roughly 467 flights and 150,000 passengers.

31. Sun 6 Sep, 17:01 WIB

    Garuda Indonesia announces it is cancelling all flights to and from Jakarta (Soekarno-Hatta), Bandung (Husein Sastranegara) and Lampung (Radin Inten II) for the rest of the day, extending into Monday 7 September until around 12:00 WIB, saying operations will resume gradually once the airports are confirmed safe. Affected passengers can rebook or request a full refund, with a claim window open through 14 September.

32. Sun 6 Sep, 17:06 WIB

    Soekarno-Hatta's own communications office (Yudistiawan, Assistant Deputy for Communication & Legal) gives the airport's latest cumulative figure: 764 flight movements affected so far — 570 domestic, 185 international and 9 cargo — accumulated across cancellations, delays and diversions since the closures began overnight.

33. Sun 6 Sep, 18:53 WIB

    Transport Minister Dudy Purwagandhi extends the closure again and widens it to eight airports — adding Taufik Kiemas (Lampung) and Atung Bungsu (Pagar Alam, South Sumatra) to the existing six — all closed until 24:00 WIB (midnight). He cites a shift in wind direction at 15,000 ft from west to east at around 5 knots as the reason for concern the ash spread could widen further ("kita khawatir bahwa ini akan semakin melebar"), and says conditions will now be reassessed and updated every four hours.

34. Sun 6 Sep, 19:01 WIB

    Halim Perdanakusuma's own operator confirms its closure specifically runs to 23:59 WIB — in practice the same end-of-day cutoff as the ministry's 24:00 WIB figure for all eight airports, just expressed as the last minute of the day rather than the first of the next. Executive General Manager of Operations Colonel Ali Sudibyo says 72 flights have been cancelled at Halim alone (36 departures carrying 2,214 passengers, 36 arrivals carrying 2,768 passengers — 4,982 passengers in total).

35. Sun 6 Sep, morning

    BPBD Banten issues formal guidance for the ashfall: wear a mask and protect the eyes when ash is falling, stay indoors where possible, close doors and windows, wash ash off skin and clothing, and do not drive when visibility is reduced. PMI (Red Cross) South Lampung distributes masks. The volcano's alert level remains unchanged at Level III (Siaga) — no escalation to Level IV. The U.S. Embassy in Jakarta has issued a Natural Disaster Alert covering the eruption and the airport closures. As of this point in the morning, no Jakarta-specific advisory had yet been issued by the DKI provincial government — that changed at 13:06 WIB, see our separate article on ash reaching inside Jakarta city for BPBD DKI's own advisory. No Japanese Embassy advisory had been found as of this update.

36. Sun 6 Sep, 20:15 WIB

    Lana Saria, Head of Badan Geologi, stresses that the direction and reach of the ash plume are inherently unstable — "the direction and extent of ash dispersal can change depending on wind direction and speed" — and that continuous monitoring is needed as conditions evolve. This framing turns out to matter the next morning, when BMKG's forecast direction shifts (see 7 September, 07:00 WIB below).

37. Sun 6 Sep, 20:23 WIB

    After the continuous eruption paused at 00:04 WIB, Anak Krakatau erupts again — a discrete event with maximum amplitude 58 mm and duration of roughly 44 seconds; the ash column was not observed. Badan Geologi repeats the 3 km exclusion radius and Level III (Siaga) status, unchanged since 2 July.

38. Sun 6 Sep, 20:54 WIB

    Soekarno-Hatta's communications office (Yudistiawan) updates the airport's own cumulative impact to 923 flight movements (671 domestic, 232 international, 20 cargo) and 119,215 passengers — again a cumulative count of cancellations, delays and diversions since the closures began, not a distinct daily figure.

39. Sun 6 Sep, ~23:20–23:36 WIB

    The six original airports — Soekarno-Hatta, Halim Perdanakusuma, Radin Inten II, Husein Sastranegara, Budiarto and Pondok Cabe — are each issued a further closure extension (staggered start times between 23:20 and 23:36 WIB), all now running to 08:59 WIB on Monday 7 September. Reporting around this time no longer lists Taufik Kiemas or Atung Bungsu among the closed airports; we could not confirm whether they formally reopened or simply dropped out of this particular report's scope.

40. Mon 7 Sep, 06:10 WIB

    The Directorate General of Civil Aviation confirms all six airports above remain closed until 08:59 WIB. The Ministry has again designated Kertajati (West Java), Ahmad Yani (Semarang) and Juanda (Surabaya) as alternate airports for diverted flights, and Soekarno-Hatta's operator is running free shuttle buses for stranded passengers to Yogyakarta, Solo, Semarang and Surabaya.

41. Mon 7 Sep, 07:00 WIB

    BMKG issues a fresh forecast: the ash plume is expected to keep shifting further west, at roughly 15 knots (28 km/h), with the surface-level layer reaching up to 15,000 ft. This is a westward expansion toward Sumatra rather than a retreat from Java — the named area list widens to include Central Java (Jawa Tengah) for the first time, alongside Banten, West Java, Jakarta, Lampung, Bengkulu, South Sumatra, the Sunda Strait and the Indian Ocean west of Bengkulu/Lampung/Banten. Central Java is where Ahmad Yani (Semarang) sits — one of the five government-designated alternate airports (see our separate article on entry/exit routes) — so its status is worth watching specifically rather than assuming it stays clear.

42. Mon 7 Sep, 06:48 WIB

    Transport Minister Dudy Purwagandhi gives a nationwide tally across the eight then-closed airports: 1,558 flights delayed/cancelled/diverted and roughly 170,000 passengers stranded.

43. Mon 7 Sep, ~07:30–08:35 WIB

    Reporting swings back to an eight-airport closure list (Taufik Kiemas and Atung Bungsu reappear alongside the original six), all targeted to reopen at 09:00 WIB (Soekarno-Hatta specifically at 08:59 WIB under NOTAM A3368/26, NOTAMR A3355/26). Transport Minister Dudy Purwagandhi declines to commit to that deadline, saying: "we cannot yet determine when it will end because the weather is too dynamic," citing BMKG data on rapidly shifting wind patterns at different altitudes. He adds that the designated alternate airports (Kertajati, Ahmad Yani, Juanda) are operating 24 hours for the duration of the closures.

44. Mon 7 Sep, 08:12 WIB

    One airport comes back: Atung Bungsu (Pagar Alam, South Sumatra) returns to operation after its paper test comes back negative for ash — the first of the eight to reopen. The Transport Minister confirms: "Based on paper test results confirmed as negative is the airport located in Pagar Alam." The other seven (Soekarno-Hatta, Halim Perdanakusuma, Radin Inten II, Budiarto, Pondok Cabe, Husein Sastranegara and Taufik Kiemas) remain closed.

45. Mon 7 Sep, 09:08 WIB

    As the 08:59/09:00 WIB deadline passes, the seven airports still shut are extended again — this time to 18:00 WIB — under fresh NOTAMs (Soekarno-Hatta A3373/26, Halim A3372/26), with Soekarno-Hatta's communications office again citing increased eruption activity; AirNav's EVP Hermana Soegijantoro says monitoring of airspace conditions and ash dispersal continues. Reuters reports the same 18:00 WIB extension for an international audience (reported, at the time, as covering all eight airports — by the time of the Minister's 14:16 WIB confirmation above, Atung Bungsu had already reopened, so seven is the more current count). Soekarno-Hatta's own cumulative figure, using data as of 21:30 WIB the previous night, is revised up again to 1,039 affected flight movements (still 119,215 passengers) — a reminder that these cumulative counts are reissued from slightly different data cuts and are best read as "in the thousand-plus range and still climbing," not a single precise total.

46. Mon 7 Sep, 10:31–13:29 WIB

    InJourney Airports gives its own cumulative figure, distinct in scope from the Minister's nationwide 06:48 WIB tally above: from 5 September through 09:00 WIB on 7 September, across the four airports it manages that were temporarily closed (Soekarno-Hatta, Halim Perdanakusuma, Husein Sastranegara/Bandung and Radin Inten II/Lampung), 2,300 flights and 268,539 passengers were affected. "Handling of passengers continues until the airport is declared reopen," said Arie Ahsanurrohim, InJourney Airports' Corporate Secretary Group Head. All four remained under "Aerodrome Closed" NOTAM status as of the early afternoon. Because this is a narrower, differently-scoped count (4 InJourney airports, cumulative since 5 September) than the Minister's 1,558-flight/170,000-passenger figure (8 airports, as of 06:48 WIB that morning), the two totals should not be added together or treated as competing counts of the same thing.

47. Mon 7 Sep, 15:17–16:21 WIB

    The clearest positive signal yet: Transport Minister Dudy Purwagandhi confirms Soekarno-Hatta has now tested negative for volcanic ash four consecutive times, and — in a limited disaster-response meeting with President Prabowo Subianto at Merdeka Palace — BMKG head Teuku Faisal Fathani reports the same clean result at three more airports (Halim Perdanakusuma, Husein Sastranegara and Budiarto/Curug): "the paper test was carried out four times in a row; all four came back negative." Even so, the Minister says he is not rushing to reopen, citing a wind-direction reversal: "we want to be certain, given that yesterday the wind changed from moving westward to moving eastward," and points to continued Volcanic Ash Advisory Center guidance of possible dispersal through 06:10 WIB on Tuesday 8 September. The list of designated alternate airports grows again, now also naming Adi Soemarmo (Solo) and Yogyakarta alongside the previously named Kertajati, Ahmad Yani and Juanda. Notably, this sits awkwardly against a near-simultaneous 15:35 WIB statement from Soekarno-Hatta's own communications office (Yudistiawan) that paper tests were "still showing positive" results for volcanic ash — a same-day discrepancy between officials that had not been publicly reconciled as of writing, so treat "clean" as provisional rather than confirmed until the airport itself reopens.

48. Mon 7 Sep, 17:33–18:57 WIB

    Despite the afternoon's clean paper tests, every remaining closed airport is extended once more, this time to 23:59 WIB: Soekarno-Hatta from 17:33 WIB under NOTAM A3387/26 (updating A3373/26), and Halim Perdanakusuma (A3386/26), Radin Inten II (B1153/26), Husein Sastranegara (C1116/26), Budiarto (C1115/26), Pondok Cabe (C1118/26) and Taufik Kiemas (C1117/26) alongside it. A small additional airport, Salakanagara at Tanjung Lesung in Pandeglang, Banten (WIHI) — not previously on this list — also closes at 17:50 WIB under NOTAM C1119/26. AirNav frames the extension as "a mitigation step to support aviation safety" given the ash distribution. Coordinating Minister Agus Harimurti Yudhoyono (AHY) explains the disconnect with the negative paper tests: citing VAAC data, he says ash is still sitting at around 15,000 ft over Lampung, Banten and Jabodetabek while drifting southwest at 10 knots toward the Indian Ocean, so the extension is about runway and aircraft safety checks rather than the paper test result alone. With this being the last update of the day, the situation stands as follows: the eruption itself paused at 00:04 WIB Sunday into Monday and has not resumed since the 20:23 WIB Sunday discrete event; of the eight airports closed since the weekend, only Atung Bungsu (Pagar Alam) has reopened (08:12 WIB, negative test), while Soekarno-Hatta, Halim, Radin Inten II, Husein Sastranegara, Budiarto, Pondok Cabe, Taufik Kiemas and now Salakanagara remain closed until at least 23:59 WIB; cumulative impact stands at roughly 1,558 flights/170,000 passengers on the Minister's nationwide count and 2,300 flights/268,539 passengers on InJourney's narrower four-airport count; and Soekarno-Hatta itself has now passed four consecutive ash tests even as its own spokesperson and the Coordinating Minister give different reasons for staying shut. Expect this timeline to resume once flights actually restart rather than simply reaching another deadline.

49. Mon 7 Sep, ticket sales

    On the specific question of when normal ticket sales (not just rebooking existing reservations) will resume: no airline or ministry statement found addresses this directly as of writing. Coverage of airline responses (Citilink, Garuda, Lion Group) so far only describes handling of already-booked, disrupted flights — free rescheduling and full refunds, processed through each airline's app or counters, with Garuda and Lion Group additionally naming 14 September as their claims deadline. None have announced a date for resuming normal sales of new tickets on the affected routes; airlines are said to be coordinating with aviation authorities and will announce operational resumption as conditions develop. (Superseded the next morning — see the reopening entry below: airlines resumed operating affected routes on 8 September, though no source found specifically addresses new-ticket sales versus rebooking as a distinct question.)

50. Mon 7 Sep 21:30 WIB – Tue 8 Sep 05:42 WIB

    The airports reopen. Garuda Indonesia announces Monday evening that it will resume Jakarta flights "secara bertahap" (in phases) from 00:01 WIB Tuesday, with each flight cleared only "after a safety assessment and airworthiness inspection for potential volcanic-ash impact," and asks passengers on early flights to arrive three hours ahead for queue congestion. At 00:01 WIB on 8 September, Transport Minister Dudy Purwagandhi confirms Soekarno-Hatta, Halim Perdanakusuma and Husein Sastranegara are "declared active again"; Budiarto and Pondok Cabe follow at 02:25 WIB. Counting Atung Bungsu (reopened Monday morning) and Salakanagara (added to the closure list Monday evening), nine airports have been closed at one point or another since the weekend; six are now open and three remain shut. Radin Inten II and Taufik Kiemas in Lampung remain closed, described as "still awaiting developments" with no reopening time given as of writing; Salakanagara's status was not mentioned in Tuesday's reopening coverage. No official statement pins the reopening on the wind finally clearing versus the accumulated clean paper tests — both had been cited over the weekend. This effectively closes out the main airport-closure story that began Saturday; we will post a separate, shorter update if Radin Inten II, Taufik Kiemas or Salakanagara reopening is confirmed, rather than continuing to extend this already-long timeline.

Key points

• Recap as of Tuesday morning 8 September, WIB — the main closure story is resolved: the continuous eruption paused at 00:04 WIB Sunday into Monday, punctuated by a discrete event at 20:23 WIB Sunday, with no further eruptive activity since. Airport closures were extended repeatedly through Monday — the count swung between six and eight (Soekarno-Hatta, Halim Perdanakusuma, Radin Inten II, Budiarto, Pondok Cabe, Husein Sastranegara, Taufik Kiemas and Atung Bungsu, later joined by a newly-closed small airport, Salakanagara at Tanjung Lesung) — through an 08:59/09:00 WIB deadline, an 18:00 WIB extension, and finally a 23:59 WIB extension even after Soekarno-Hatta passed four consecutive negative ash tests (a same-day discrepancy with its own spokesperson's "still positive" statement was never publicly reconciled). Overnight into Tuesday, Soekarno-Hatta, Halim Perdanakusuma and Husein Sastranegara reactivated at 00:01 WIB, with Budiarto and Pondok Cabe following at 02:25 WIB; Garuda Indonesia is resuming Jakarta flights in phases from the same moment, each cleared by a fresh safety and airworthiness check, and is asking passengers on early flights to arrive three hours ahead. Of nine airports closed at some point since the weekend, six are now open; Radin Inten II, Taufik Kiemas and Salakanagara remain shut with no confirmed reopening time. Cumulative impact over the closure stood at roughly 1,558 flights/170,000 passengers on the Minister's nationwide count and 2,300 flights/268,539 passengers on InJourney's narrower four-airport count. No airline has stated when normal ticket sales (as opposed to rebooking) resume. Confirm your flight status with the airline directly, especially if flying from one of the three still-closed airports.
• Volcano status: unchanged at Level III (Siaga) since 2 July 2026 — it has not been raised to Level IV despite the intensity of this eruption.
• Tsunami: PVMBG states the cone rebuilt since 2018 cannot collapse on a scale that would trigger a tsunami and asks the public not to be swayed by rumours; the JMA observed no tidal change. Treat viral tsunami warnings as unverified unless they come from BMKG or Badan Geologi.
• Mask advisories: yes, from Banten, Lampung and — since 13:06 WIB — Jakarta itself. Banten Governor Andra Soni and BPBD Banten ask residents of affected areas to wear a mask and protect their eyes outdoors, stay indoors where possible, close doors and windows, and not drive in poor visibility; BPBD and the health office in Bandar Lampung and South Lampung regency add masks or goggles outdoors, closed vents, and covered food and water. BPBD DKI Jakarta's own advisory came later than the others — see our separate article on ash reaching inside Jakarta city for its specific medical-mask recommendation.
• The Merak–Bakauheni ferry crossing of the Sunda Strait was reported operating normally on 5 September, and the 3 km exclusion radius is unchanged.
• Embassy advisories: the U.S. Embassy in Jakarta has issued a Natural Disaster Alert covering the eruption and the three airport closures. Update: the Japanese Embassy in Jakarta also issued a series of four advisories on this eruption between 6 and 8 September, tracking the Soekarno-Hatta/Halim closures, extensions and reopening (see Sources below) — an earlier version of this article had not yet located these.

Sources

• Badan Geologi / PVMBG — Fenomena erupsi menerus Gunungapi Anak Krakatau tanggal 5 September 2026 (primary source)
• detikNews — Anak Krakatau Erupsi Lagi dengan Durasi 30 Detik, Jauhi Radius 3 Km (6 September, 03:53 WIB eruption)
• CNN Indonesia — Gunung Anak Krakatau Kembali Meletus Minggu Dini Hari
• CNN Indonesia — Bandara Soekarno-Hatta Tutup Sementara hingga Pukul 09.30 WIB
• detikNews — Bandara Soetta Masih Ditutup hingga 09.30 WIB Imbas Erupsi Anak Krakatau
• CNN Indonesia — Imbas Erupsi Anak Krakatau, Bandara Radin Inten II Tutup Sementara
• Kompas — Erupsi Anak Krakatau Ganggu Penerbangan, 3 Rute dari dan ke Lampung Dibatalkan
• Suara.com — Sebaran Abu Vulkanik Anak Krakatau Terdeteksi hingga Bandung, BMKG Ungkap Dua Klaster (5 Sept, 20:00 WIB bulletin)
• Kompas — Abu Vulkanik Anak Krakatau Selimuti Lampung, Penumpang Cemas Tak Bisa Terbang ke Jakarta
• Liputan6 — Penjelasan Kemenhub soal Bandara Soekarno-Hatta Ditutup Sampai Pukul 09.30 WIB (Dirjen Hubud Lukman F. Laisa; NOTAM A3341/26→A3344/26; second paper test)
• CNBC Indonesia — Bandara Soetta Tutup Sampai 09.30 WIB, 22.798 Penumpang Terdampak
• CNBC Indonesia — 3 Bandara Tutup Gara-Gara Krakatau Meletus, Cek Jadwal Terbarunya (Soekarno-Hatta, Halim, Radin Inten II)
• CNN Indonesia — Bandara Halim Ditutup Sementara hingga Pukul 10.00 WIB (NOTAM A3345/26)
• Tangsel Pos — Erupsi Anak Krakatau, Bandara Radin Inten II Ditutup hingga Pukul 10.00 WIB (extension; cancelled flights)
• Tangsel Pos — Gunung Anak Krakatau Erupsi Dua Kali Pagi Ini, Terbaru Pukul 07.10 WIB
• Riau Aktual — Bandara Soekarno-Hatta Tutup hingga 13.30 WIB
• CNBC Indonesia — Bandara Soetta Tutup Sampai 13.30 WIB Gara-Gara Abu Letusan Krakatau (NOTAM A3346/26; Halim and Radin Inten II status)
• CNBC Indonesia — Letusan Krakatau Sudah Berhenti, Pakar Geologi Beri Peringatan Baru (eruption paused 00:04 WIB; Lana Saria, Badan Geologi)
• Media Indonesia — AirNav Perpanjang Penutupan Bandara Soekarno-Hatta, Halim, dan Radin Inten II (NOTAM A3347/26, B1125/26)
• Tangsel Pos — 373 Penerbangan Terdampak Erupsi Anak Krakatau, 202 di Soekarno-Hatta (10:35 WIB nationwide tally)
• Liputan6 — Lima Bandara yang Ditutup Imbas Abu Vulkanik Anak Krakatau (five/six airports, closure windows)
• Katadata — Enam Bandara Ditutup Imbas Anak Krakatau, Kertajati dan Juanda Jadi Alternatif (six airports, diversion airports, Transport Minister quote)
• CNBC Indonesia — Bandara Soetta Tutup Sampai 17:30 WIB, Ratusan Penerbangan Batal (NOTAM A3348/26; 202-flight breakdown)
• Katadata — 301 Penerbangan di Bandara Soekarno-Hatta Terdampak Erupsi Anak Krakatau (13:30 WIB tally)
• Liputan6 — Tinjau Bandara Soekarno-Hatta, Menhub: Hasil Paper Test Masih Positif Abu Vulkanik (13:55 WIB, Dudy Purwagandhi)
• RRI — Menhub: Penutupan Enam Bandara Diperpanjang hingga 18.00 WIB (15:20 WIB, six airports, ~467 flights/150,000 passengers)
• ANTARA News — Garuda Indonesia batalkan seluruh penerbangan Jakarta hingga Lampung (all flights cancelled into Monday ~12:00 WIB)
• ANTARA News — Erupsi GAK, sebanyak 764 penerbangan terdampak di Bandara Soetta (17:06 WIB, Yudistiawan)
• Republika — Menhub Jelaskan Alasan Masih Tutup 8 Bandara Hingga Tengah Malam (18:53 WIB, wind-shift reasoning, 4-hour review cadence)
• detikNews — Penutupan Bandara Halim Diperpanjang Sampai Pukul 23.59 WIB (19:01 WIB, Kolonel Ali Sudibyo, 72-flight breakdown)
• CNBC Indonesia — Anak Krakatau Erupsi Lagi Malam Ini, Status Level III (20:23 WIB eruption, 58mm/44s)
• detikNews — 119 Ribu Penumpang-923 Penerbangan di Soetta Terdampak Erupsi Anak Krakatau (20:54 WIB, Yudistiawan)
• detikNews — Pengumuman! Bandara Soetta Ditutup hingga Senin Pagi Imbas Erupsi Anak Krakatau (00:29 WIB Monday, extension to 08:59 WIB)
• detikNews — Update Dampak Erupsi Anak Krakatau Senin Pagi: 6 Bandara Masih Ditutup (06:10 WIB Monday, six-airport list with individual closure start times)
• CNN Indonesia — Update Waktu Penutupan 7 Bandara: Soetta dan Halim Hingga 08.59 WIB (04:57 WIB Monday)
• CNBC Indonesia — Kapan Bandara Tutup Imbas Krakatau Dibuka Lagi? Menhub Buka Suara (08:35 WIB Monday, Dudy Purwagandhi quote)
• CNN Indonesia — Daftar 8 Bandara yang Ditutup Imbas Erupsi Anak Krakatau Hari Ini (08:05 WIB Monday, eight-airport list)
• Kompas — BMKG: Abu Vulkanik Anak Krakatau Diperkirakan Menyebar ke Arah Barat (07:00 WIB forecast, published 08:43 WIB)
• RRI — Badan Geologi: Sebaran Abu Vulkanik Berubah-rubah, Tergantung Arah Angin (20:15 WIB, Lana Saria)
• Viva — Dampak Erupsi Gunung Anak Krakatau, 28 Penerbangan di Bandara Ahmad Yani Semarang Dibatalkan
• Viva — Menhub Sebut Bandara Alternatif Beroperasi 24 Jam Selama 8 Bandara Tutup Imbas Anak Krakatau
• Kompas — UPDATE: Penutupan Bandara Soekarno-Hatta Senin Ini Diperpanjang hingga 18.00 WIB (09:08 WIB, Yudistiawan)
• RRI — Erupsi Anak Krakatau Terdampak Pada 1.039 Penerbangan di Bandara Soetta (21:30 WIB data cut, Yudistiawan)
• Reuters — Eight Indonesian airports remain shut due to volcanic ash, Anak Krakatau (7 Sept 2026, 18:00 WIB extension)
• detikNews — 1 Bandara Dibuka, 7 Lainnya Masih Ditutup Imbas Erupsi Gunung Anak Krakatau (14:16 WIB, Menhub quote on Atung Bungsu)
• JPNN — Update NOTAM: 7 Bandara Ini Masih Ditutup, Bandara Atung Bungsu Sudah Kembali Normal (10:17 WIB; NOTAM A3373/26, A3372/26)
• CNBC Indonesia — InJourney Airports: 2.300 Penerbangan dan 268.539 Penumpang Terdampak Penutupan 4 Bandara (10:31 WIB, Arie Ahsanurrohim)
• Okezone — Update penutupan 4 bandara InJourney Airports hingga pukul 18.00 WIB (13:29 WIB)
• detikNews — Paper Test Soetta Negatif Abu Vulkanik tapi Masih Ditutup, Menhub Ungkap Alasannya (15:17 WIB, Dudy Purwagandhi on wind-direction reversal)
• CNBC Indonesia — Soetta, Halim & Curug Lolos Paper Test, Tak Ada Jejak Abu Vulkanik (16:21 WIB, BMKG's Teuku Faisal Fathani to President Prabowo)
• Kompas — Apakah Bandara Soekarno-Hatta Sudah Dibuka? Cek Info Terbarunya (15:35 WIB, Yudistiawan: paper test still positive)
• JPNN — Update NOTAM: Penutupan Bandara Soekarno-Hatta Diperpanjang Hingga 23.59 WIB (18:42 WIB; NOTAM A3387/26)
• CNBC Indonesia — AirNav: Penutupan 7 Bandara Masih Diperpanjang Sampai Pukul 23.59 WIB (18:57 WIB; NOTAM numbers for all seven, plus Salakanagara/Tanjung Lesung)
• Liputan6 — Menko AHY Ungkap Alasan Perpanjang Waktu Penutupan Bandara Soekarno-Hatta (18:40 WIB; VAAC data, wind toward Indian Ocean)
• Liputan6 — Bandara Soekarno-Hatta Bakal Dibuka, Garuda Indonesia Bersiap Layani Penerbangan Mulai Besok (Mon 21:30 WIB; phased resumption from 00:01 WIB)
• CNN Indonesia — Menhub: Bandara Soetta, Halim, dan Husein Sastranegara Kembali Dibuka (Tue 05:20 WIB; Minister's 00:01 WIB confirmation)
• CNN Indonesia — Daftar 5 Bandara Kembali Dibuka Beroperasi: Soetta hingga Pondok Cabe (Tue 05:42 WIB; Budiarto/Pondok Cabe at 02:25 WIB, remaining closures)
• detikNews — Bandara Soekarno-Hatta Sudah Kembali Dibuka Selasa Dini Hari
• Bloomberg Technoz — Langkah Maskapai Soal Gangguan Penerbangan Imbas Erupsi Krakatau (Citilink reschedule/refund policy)
• VIVA — Penutupan 6 Bandara Imbas Abu Vulkanik Anak Krakatau Diperpanjang (15:22 WIB, four-hour extension)
• CNN Indonesia — AirNav: Penutupan 3 Bandara Bagian Langkah Keselamatan Penerbangan
• U.S. Embassy & Consulates in Indonesia — Natural Disaster Alert: Mt. Anak Krakatau Eruption, September 6, 2026
• 在インドネシア日本国大使館 — クラカタウ火山噴火によるスカルノ・ハッタ国際空港での運航停止等について（9月6日）
• 在インドネシア日本国大使館 — クラカタウ火山噴火に伴う火山灰の影響について（第2報、9月6日）
• 在インドネシア日本国大使館 — アナック・クラカタウ火山噴火に伴うスカルノ・ハッタ国際空港等の運航状況について（9月7日）
• 在インドネシア日本国大使館 — （運航再開）アナック・クラカタウ火山噴火に伴うスカルノ・ハッタ国際空港等の運航状況について（9月8日）
• Katadata — Abu Erupsi Anak Krakatau Terdeteksi di Jakarta, Bogor, Depok, Banten, Lampung
• Kompas — Abu Vulkanik Anak Krakatau Sampai Bogor, Debu Nempel di Motor hingga Layar Ponsel
• detikNews — Abu Anak Krakatau Menyebar Hingga Bogor, Warga Kaget Mobilnya Penuh Debu
• 気象庁 — 令和８年９月５日02時50分頃のクラカタウ火山（インドネシア）の大規模噴火について（第２報）
• Say Lampung — Anak Krakatau Siaga, Penyeberangan Merak–Bakauheni Masih Normal
• detikNews — Hujan Abu Vulkanik Krakatau di Wilayah Banten, Warga Diimbau Pakai Masker (Governor Andra Soni)
• Bloomberg Technoz — Abu Vulkanik Anak Krakatau Meluas, Warga Diimbau Gunakan Masker (BPBD Banten guidance)
• ANTARA News — BPBD Bandarlampung imbau warga waspada potensi debu vulkanik GAK
• Koran Jakarta — Waspada Abu Vulkanik Anak Krakatau, PMI Lampung Selatan Bagikan Masker
• ANTARA News — Kemenhub: Bandara Soetta ditutup sementara imbas erupsi Anak Krakatau
• ANTARA News — Kemenhub: Operasional bandara normal usai erupsi Gunung Anak Krakatau
• Republika — Sebaran Abu Anak Krakatau Picu Penutupan Bandara Soetta, 33 Penerbangan Terdampak
• detikNews — BMKG: Sebaran Abu Anak Krakatau Sampai ke Sebagian Wilayah Jakarta
• CNN Indonesia — Sebaran Abu Vulkanik Gunung Anak Krakatau Sampai ke Jakarta
• ANTARA News — Erupsi Anak Krakatau bawa hujan abu tipis ke pesisir Banten
• Kompas — Erupsi Gunung Anak Krakatau Terkuat di 2026, Catat 240 Letusan Sepanjang Status Siaga
• ウェザーニュース — インドネシア・クラカタウ火山で大規模な噴火 噴煙高度約1万5000mと報告