Kalimantan forest-fire smoke was seen over Jakarta, Banten and West Java in Himawari-9 imagery on 16 October — BMKG says it stayed in the atmosphere and is now moving away, and that Jakarta's worse air is mainly local emissions

On 16 October 2026 a post on X went viral saying that, according to Himawari 9 satellite data, smoke from the Kalimantan forest fires was heading for West Java and Jakarta. The substance is confirmed by BMKG, Indonesia's meteorology agency, with an important limit. BMKG says its Himawari-9 imagery on Friday 16 October identified smoke from the fires over parts of Banten, DKI Jakarta and West Java, and that the smoke has so far been detected in the atmosphere, not at ground level. BMKG's satellite-analysis team lead said it has reached Jakarta by area but not yet vertically to the surface, and that it could reach the surface, thinly, if the wind weakens. BMKG's Secretary General said BMKG still has to establish whether concentrations are actually rising at the surface or the smoke is only passing through the upper atmosphere. The evening before, BMKG's Bandung station had said the wind direction meant the smoke would not cross West Java. On Friday afternoon Jakarta's governor said the city's air has worsened over recent days, did not attribute that to the fires, and ordered hospitals and health centres to prepare. Update, 20 October: BMKG said on 19 October that its latest monitoring shows the smoke moving away from western Java, including Jabodetabek, and on 20 October its Director of Applied Climate Services said Jakarta's recent worsening air quality comes mainly from vehicle emissions, industry and waste burning, not the haze, with PM2.5 rising since June 2026. Smoke at ground level was never confirmed. Air-quality readings reported by the press differ by source and time (see the timeline).

Timeline

1. Thu 15 Oct, 13:00 WIB

   BMKG's weekly forecast for 16–22 October cites Himawari imagery from this time showing smoke over most of Sumatra, Kalimantan, Sulawesi, Maluku and Papua; Java is not on the list. The same page records 12 hotspots in Java on 14 October.

2. Thu 15 Oct, evening

   Suaidi Ahadi, head of BMKG's Geophysics Station in Bandung, says that judging by wind direction the Kalimantan smoke will not cross West Java; Muhamad Iid Mujtahidin, who leads the station's meteorology and climatology team, says satellite imagery shows the wind still moving mainly from east to southeast (Tinta Hijau, citing Kompas).

3. Fri 16 Oct, 08:00 WIB

   BMKG's Himawari-9 imagery from this time identifies smoke over parts of Banten, DKI Jakarta and West Java (Kompas and afu.id, quoting BMKG's Alpon Sepriando). Republika and Disway instead cite imagery from 10:00 WIB; the reports differ, and we do not know whether this is two images or a difference between observation and release time.

4. Fri 16 Oct, time not stated

   A post on X, with a screenshot said to show Himawari 9 data, says smoke from the Kalimantan fires is heading for West Java and Jakarta and could reach West Java that night (Jawa Pos, 16:47 WIB; the time of the post itself is not given). We have not verified that the screenshot is what it is said to be; the part about direction is consistent with BMKG's Friday imagery, but the timing is not a BMKG statement.

5. Fri 16 Oct, around midday

   Alpon Sepriando, who leads BMKG's satellite-analysis and lightning-detection team, says the smoke has reached Jakarta by area but not yet vertically to the surface, and that if the wind weakens it could reach the surface thinly. He explains the transport as low-level wind blowing from east–southeast toward west–northwest and mid-to-upper-level wind from northeast toward southwest, and says it is unclear when and how far the smoke will affect Jakarta's air quality because local emissions also matter (Kompas, 11:56 WIB; afu.id, 13:29 WIB).

6. Fri 16 Oct, afternoon

   Guswanto, BMKG's Secretary General, says BMKG's delineation shows smoke from the Kalimantan fires has entered Banten, West Java and Jakarta itself, that it has so far been observed only in the atmospheric layer, and that BMKG still has to determine whether concentrations are really rising at the surface or the smoke is only passing through the upper atmosphere. He says the situation could worsen if the fires spread, that KN95, KF94 or N95 masks filter particles more effectively, and that people should avoid outdoor exercise in the morning and afternoon if air quality worsens (Katadata, 13:26 WIB; Republika, 14:32 WIB; Disway, 14:46 WIB).

7. Fri 16 Oct, 15:27 WIB

   Jakarta Governor Pramono Anung says the city's air has worsened over the past two to three days, that he does not want to blame anyone, and that he did not want the matter to turn into a dispute over the cause. He says he has ordered 31 hospitals, 44 community health centres (puskesmas) and 292 auxiliary health posts to be ready to help residents, and will hold a meeting to decide on further steps if conditions worsen (Liputan6).

8. Fri 16 Oct, 18:00 WIB

   IQAir's Jakarta reading is AQI 90, 'moderate', with PM2.5 at 30 µg/m³ (Kompas.com, 18:53 WIB). The same report repeats that BMKG's Himawari-9 imagery showed the smoke in the upper atmosphere, not detected at ground level, and that BMKG says Jakarta's declining air quality cannot be directly linked to the smoke, citing vehicle emissions and industrial activity.

9. Mon 19 Oct, 11:00 WIB

   IQAir shows Jakarta at AQI 162, 'unhealthy', with PM2.5 at 71 µg/m³ (as cited by Indoposco).

10. Mon 19 Oct, 12:44 WIB

    BMKG says its latest monitoring shows the smoke starting to move away from western Java, including Jabodetabek, and that it was in the high atmosphere, so it did not immediately affect the air residents breathe (Suara.com). Governor Pramono Anung orders full readiness of 367 health facilities (31 hospitals, 44 puskesmas and 292 auxiliary posts) for breathing problems; 179 water-mist devices in 145 buildings are switched on, weather modification is prepared as an option, and distance learning, limits on outdoor activity for vulnerable groups and mask recommendations are listed as options if air quality worsens significantly.

11. Tue 20 Oct, 00:30 WIB

    Marjuki, BMKG's Director of Applied Climate Services, says Jakarta's recent worsening air quality was not caused by forest-fire haze but by motor-vehicle emissions, followed by industry and the burning of dry waste, and that PM2.5 in Jakarta has been rising since June 2026, before the fires; BMKG cited about 48 µg/m³ in early October, a pattern it describes as similar to the previous year. He says the dry season and El Niño reduce the rain that washes pollutants out, and repeats that smoke from Sumatra and Kalimantan was seen high in the atmosphere on 16 October without directly affecting surface air (Indoposco).

12. Sun 25 Oct

    BMKG's Miming Saepudin, head of its team for forecasting and early warning of special weather phenomena, says Tropical Cyclone Champi does not draw fire smoke from distant areas directly but changes regional wind direction and speed, which alters the paths smoke takes, and that Champi no longer affects weather or waves in Indonesia. Medium to heavy rain is expected within two days in Aceh, North Sumatra, West Sumatra and Riau and parts of Jambi and South Sumatra, while rain may be uneven in West, South and Central Kalimantan, where BMKG urges continued vigilance against fire risk (Koran Jakarta, 17:52 WIB). The report does not mention Jakarta or Java.

Key points

• Status at 20 October: BMKG confirmed smoke from the fires over parts of Banten, DKI Jakarta and West Java in Himawari-9 imagery on 16 October, said on 19 October that the smoke is moving away from western Java, and has not confirmed smoke at ground level at any point. It attributes Jakarta's recent worsening air quality mainly to vehicle emissions, industry and waste burning.
• Source of the smoke: BMKG's Secretary General attributes it to the Kalimantan fires (Katadata); Disway's report of the same briefing says smoke from Kalimantan and Sumatra. Republika separately reports that BMKG's imagery shows Sumatra smoke moving toward Peninsular Malaysia and Singapore.
• What the imagery cannot tell you: the Secretary General said it shows smoke in the atmosphere, not the surface concentrations people breathe (Katadata). Ground readings differ by source and time: press reports cite IQAir at AQI 90 ('moderate', PM2.5 30 µg/m³) at 18:00 WIB on 16 October and AQI 162 ('unhealthy', PM2.5 71 µg/m³) at 11:00 WIB on 19 October. We do not publish a current figure; Jakarta's official air-quality platform is udara.jakarta.go.id.
• Outlook: on 16 October BMKG said the situation could worsen if the fires spread, and on 19 October that the smoke was moving away from western Java. The Jakarta government says it has options ready if air quality worsens significantly: distance learning, limits on outdoor activity for vulnerable groups and mask recommendations, with weather modification prepared. The fires themselves were still burning in the reports we read, and we have seen no BMKG forecast of whether smoke will return.
• Background: Al Jazeera (AFP and Reuters) reports 799 high-confidence hotspots nationwide as of Thursday night, 15 October, up 427 from the day before, and four people fighting a fire in Bromo Tengger Semeru National Park, East Java, killed — announced by the Forestry Ministry on Friday. Jiji Press reports acute respiratory illness in Central Kalimantan and nearby areas above 280,000 cases over about two months to 13 October, with a strong El Niño drying the land and the rainy season delayed.
• Japanese Embassy: we did not find an advisory from the Japanese Embassy in Indonesia on this smoke at the time of writing. The Embassy's site cannot be read by automated fetch, so this means 'not found', not 'none issued' — check the Embassy's safety information directly.

Sources

• Kompas.com — Waspada, Asap Karhutla Kalimantan Sudah Masuk Atmosfer Jakarta (11:56 WIB, 16 October 2026; Alpon Sepriando, BMKG)
• Katadata — Asap Karhutla Kalimantan Sudah Capai Jakarta, BMKG Imbau Pakai Masker (13:26 WIB, 16 October 2026; Guswanto, BMKG)
• afu.id — BMKG: Asap Karhutla Sampai Jakarta, Terdeteksi Lewat Citra Satelit Himawari-9 (13:29 WIB, 16 October 2026)
• Republika — BMKG Pastikan Asap Karhutla Telah Masuk Wilayah Jakarta (14:32 WIB, 16 October 2026; Guswanto, BMKG)
• Disway — Waspada! BMKG Deteksi Sebaran Asap Karhutla Sampai Jakarta, Warga Diminta Pakai Masker (14:46 WIB, 16 October 2026)
• Liputan6 — Kualitas Udara Jakarta Memburuk, Pramono Pilih Tak Berspekulasi (15:27 WIB, 16 October 2026)
• Jawa Pos — Viral Asap Karhutla Kalimantan Menuju Jakarta dan Jabar, Berikut Kata Ahli (16:47 WIB, 16 October 2026; the viral post)
• Tinta Hijau — BMKG Pastikan Asap Karhutla Kalimantan Tidak Akan Melintas ke Jawa Barat (BMKG Bandung statement of the evening of 15 October 2026)
• BMKG — Prakiraan Cuaca Indonesia Sepekan Periode 16–22 Oktober 2026 (Himawari imagery of 15 October 2026, 13:00 WIB; hotspot counts)
• Al Jazeera — Four killed as Indonesia battles worst forest fires in more than a decade (16 October 2026; nationwide hotspots, Bromo Tengger Semeru deaths)
• 時事通信 (Jiji Press) — 長引く森林火災、影響深刻化＝インドネシア、エルニーニョ現象が拍車 (15 October 2026; respiratory illness cases, El Niño)
• Pemprov DKI Jakarta — Udara Jakarta, official air-quality monitoring platform (live readings; not read for figures in this article)
• Kompas.com — Asap Karhutla Terdeteksi di Atmosfer Jakarta, Bagaimana Kualitas Udara Jumat Malam? (18:53 WIB, 16 October 2026; IQAir reading, BMKG caveat)
• Suara.com — Asap Karhutla Mulai Menjauh, Jakarta Tetap Waspada Hadapi Ancaman Polusi Udara (12:44 WIB, 19 October 2026; BMKG, Governor Pramono Anung)
• Indoposco — Bukan Asap Karhutla, Polusi Udara Jakarta Akibat Emisi Kendaraan (00:30 WIB, 20 October 2026; Marjuki, BMKG)
• Koran Jakarta — BMKG: Siklon Champi Ubah Arah Sebaran Asap Karhutla (17:52 WIB, 25 October 2026; Miming Saepudin, BMKG)