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45 clusters · 77 sources · 155 days · First seen · Last updated

Indonesia volcanic activity September-October 2026

Overview

Indonesia’s volcanic activity intensified through August and early September 2026. Between August 18 and 20, Mount Ibu, Mount Lewotobi Laki-laki, and Mount Semeru all experienced eruptions. Mount Ibu was placed at Level II (Alert), while Lewotobi Laki-laki and Semeru were at Level III (Standby). On August 27, Mount Lewotobi Laki-laki erupted, producing a 2,500-meter ash column. On September 6, Mount Ibu experienced multiple eruptions, and Mount Semeru produced a 1,000-meter ash column. Semeru remains at Level III (Siaga), with a 5 km radius exclusion zone and a 13 km sector restriction along Besuk Kobokan. Activity expanded on September 7, when Gunung Ile Lewotolok in East Nusa Tenggara experienced two eruptions with 600-meter ash columns, placing it at Level II (Waspada) with a 2 km exclusion zone. Additionally, Gunung Merapi recorded 14 lava flows toward the southwest, reaching distances of 2,000 meters, while remaining at Level III (Siaga). As multiple volcanoes—including Anak Krakatau, Dukono, and Sinabung—report eruptions, officials from the Geological Agency and BRIN clarified that these simultaneous events are natural phenomena of the Pacific Ring of Fire. The government is monitoring potential disruptions to aviation cargo and logistics. Meanwhile, health officials are emphasizing disaster preparedness to manage respiratory risks posed by volcanic ash. On September 8, Lewotolok erupted again, sending ash and material toward residential areas. Residents reported lava flows approaching traditional villages and gardens within 200 to 300 meters. Concurrently, eruptions at Anak Krakatau forced the temporary suspension of hundreds of flights at Jakarta’s main airport. The national volcanic agency has prohibited all activities within a 3 km radius of Lewotolok and advised the use of masks due to declining air quality. By September 9, the Geological Agency recorded eruptions from 11 active volcanoes throughout 2026. On September 27, Mount Semeru experienced four eruptions between 00:21 and 06:22 WIB.

Entities

Lumajang · PVMBG · Mount Semeru · Malang · Indonesia

Claims

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Timeline

  1. [INTERNATIONAL] 8 sources
    Mount Semeru and Mount Merapi show increased volcanic activity

    Mount Semeru and Mount Merapi in Indonesia show increased volcanic activity. Semeru's eruptions produced 900-meter ash columns, leading to tightened exclusion zones and Level III alert status.

  2. [CULTURE] 2 sources
    Indonesia strengthens safety measures for volcano tourism

    Indonesia's Ministry of Tourism is strengthening safety protocols, infrastructure, and guide training to protect visitors amid dynamic volcanic activity across the country.

  3. [INTERNATIONAL] 3 sources
    Mount Semeru erupts seven times with ash columns reaching 1,000 meters

    Mount Semeru in East Java experienced seven eruptions on Wednesday, with ash columns reaching 1,000 meters. Authorities have issued safety warnings for areas within 13 km of the summit.

  4. [INTERNATIONAL] 11 sources
    Mount Semeru erupts with 1,300-meter ash column in East Java

    Mount Semeru in East Java, Indonesia, erupted multiple times on September 27, 2026, with ash columns reaching 1,300 meters. The volcano is at Alert Level III, with strict exclusion zones in place.

  5. [INTERNATIONAL] 13 sources
    Indonesia faces volcanic eruptions and wildfires

    Indonesia faces multiple natural threats as Gunung Semeru, Merapi, and Sinabung show high volcanic activity, while wildfires impact several regions and BMKG ramps up earthquake preparedness training.

  6. [INTERNATIONAL] 3 sources
    Indonesia experiences rare simultaneous eruptions of six volcanoes

    Six volcanoes in Indonesia, including Anak Krakatau, have erupted in close succession, causing widespread volcanic ash clouds that reached Jakarta and disrupted travel for hundreds of thousands.

  7. [INTERNATIONAL] 10 sources
    Mount Semeru erupts in East Java with loud booming sounds

    Mount Semeru erupted in East Java on September 16, 2026, producing loud booming sounds. No casualties were reported, but authorities have issued safety zones due to the volcano's Level III Alert status.

  8. [INTERNATIONAL] 15 sources
    Gunung Semeru volcano maintains Level III status after multiple eruptions

    Gunung Semeru in East Java remains at Level III (Siaga) status following multiple eruptions in mid-September 2026, with ash columns reaching 1,000 meters and safety zones established around Besuk Kobokan.

  9. [INTERNATIONAL] 16 sources
    Indonesia volcanoes erupt simultaneously across multiple regions

    Several Indonesian volcanoes, including Mount Semeru and Anak Krakatau, have erupted simultaneously. Experts confirm the events are natural and unrelated, while the government monitors economic and aviation'sry

  10. [INTERNATIONAL] 15 sources
    Indonesian volcanoes Semeru, Ile Lewotolok, and Merapi report increased activity

    Indonesia faces increased volcanic activity as Gunung Semeru, Gunung Ile Lewotolok, and Gunung Merapi report eruptions and lava flows, prompting exclusion zones and heightened alert levels.

  11. [INTERNATIONAL] 2 sources
    Mount Ibu volcano erupts in North Maluku

    Mount Ibu in North Maluku, Indonesia, erupted twice on September 6, 2026. Authorities have issued a 2-km exclusion zone and warned residents to use protective gear against volcanic ash.

  12. [INTERNATIONAL] 6 sources
    Mount Lewotobi Laki-Laki erupts in East Nusa Tenggara

    Mount Lewotobi Laki-Laki in East Nusa Tenggara erupted on August 27, 2026, sending a 2,500-meter ash column into the air. The volcano remains at Alert Level III.

  13. [INTERNATIONAL] 13 sources
    Indonesia faces multiple volcanic eruptions and widespread forest fires

    Indonesia is experiencing simultaneous volcanic eruptions at Mount Semeru, Lewotobi Laki-laki, and Ibu, alongside widespread forest fires in Arjuno-Welirang and Bangka Belitung.

  14. [INTERNATIONAL] 7 sources
    Mount Lewotobi Laki-laki erupts, ash plume 1 km high in East Flores

    Mount Lewotobi Laki‑laki erupted on 2 Aug 2026, producing a 1 km ash plume; authorities issued a Level III alert and safety measures for nearby residents.

  15. [INTERNATIONAL] 2 sources
    Mount Lewotobi Laki-laki erupts multiple times, ash plumes reach 800 m in Indonesia

    Mount Lewotobi Laki‑laki in East Nusa Tenggara erupted three times on 25 July and four times on 26 July 2026, sending ash plumes up to 800 m and prompting a 5‑km evacuation warning.

  16. [INTERNATIONAL] 5 sources
    Gunung Semeru erupts twice as tremor activity dominates

    Gunung Semeru erupted twice early Thursday, with dozens of tremors recorded and alert level III maintained; residents barred from a 5 km zone around the summit.

  17. [INTERNATIONAL] 6 sources
    Gunung Sorikmarapi Volcano Activity Rises, Authorities Issue 1.5 km Exclusion Zone

    Gunung Sorikmarapi in North Sumatra saw a sharp rise in deep volcanic earthquakes on 18 July 2026, prompting a Level II warning and a 1.5 km exclusion zone around the crater.

  18. [INTERNATIONAL] 4 sources
    Mount Lewotobi Laki-Laki Eruption Sends 1,000‑Meter Ash Plume in Indonesia

    Mount Lewotobi Laki‑Laki erupted on 18 July 2026, sending a 1,000 m ash plume, prompting a Level III alert, a 5 km evacuation zone and health warnings in Indonesia.

  19. [INTERNATIONAL] 2 sources
    Gunung Semeru erupts in Java, sending hot clouds 3.5 km down slopes

    Gunung Semeru erupted on Saturday, sending a 1,000‑m ash column and a 3.5‑km hot cloud toward Besuk Kobokan; alert Level III stays, with safety zones imposed.

  20. [INTERNATIONAL] 6 sources
    Indonesia's Dukono and Semeru Volcanoes Erupt on July 15, 2026

    Mount Dukono and Mount Semeru erupted on July 15, 2026, sending ash columns up to 2.3 km and 1.2 km high, prompting alert levels II and III and safety warnings across Indonesia.

  21. [INTERNATIONAL] 5 sources
    Indonesia's Merapi and Semeru Volcanoes Erupt in Mid‑July 2026

    Indonesia’s Merapi and Semeru volcanoes erupted on July 12‑13 2026, sending lava avalanches up to 2 km and ash plumes 800‑900 m high, prompting Level III alerts and safety zones.

  22. [POLITICS] 3 sources
    Anak Krakatau’s Level III Alert Prompts Banten Evacuation Plans

    Indonesia raised Anak Krakatau to Level III (Siaga) after heightened volcanic activity in June, prompting Banten’s disaster agency to strengthen tsunami mitigation, issue a 40‑minute evacuation window and keep

  23. [INTERNATIONAL] 2 sources
    Mount Merapi launches hot cloud 2 km southwest, officials warn residents

    Mount Merapi emitted a hot cloud that traveled 2 km southwest on 10 July 2026; BPPTKG logged a 34 mm amplitude, 137 s duration and urged residents to avoid the dangerous zone.

  24. [INTERNATIONAL] 2 sources
    Anak Krakatau erupts multiple times, ash plume reaches up to 250 m

    Anak Krakatau erupted five times on 8 July 2026, sending ash up to 250 m high; authorities set a 3 km safety zone and issued a Level III alert.

  25. [INTERNATIONAL] 2 sources
    Indonesia's Lewotobi Volcano erupts, ash plume reaches up to 1,400 m

    Lewotobi Volcano in Indonesia erupted on 6‑7 July 2026, sending ash plumes up to 1,400 m; authorities ordered a 5 km evacuation zone and warned of lahars.

  26. [CRIME] 6 sources
    Mount Semeru erupts 1 km, authorities warn of ash, lava flow and secondary explosions

    Mount Semeru erupted on 6 July 2026, sending a 1 km ash column aloft; officials set 5‑km and 13‑km safety zones, warned sand‑miners of secondary explosions, and debunked a hoax eruption video.

  27. [BUSINESS] 6 sources
    Gunung Anak Krakatau Stay on Level III Alert; Tourism Persists, Hoax Video Denied

    Gunung Anak Krakatau stays at Level III alert after minor eruptions on July 2‑3; authorities say tourism on Pulau Sebesi and Anyer beaches is safe and a viral eruption video is a hoax.

  28. [CULTURE] 6 sources
    Mount Semeru erupts repeatedly; hiking trail closed through August for Hari Raya Karo

    Mount Semeru erupted repeatedly on 3‑4 July 2026, prompting a Level III alert, activity bans near the crater, and a temporary trail closure from 7‑18 August for the Karo holiday; officials also warned against a

  29. [INTERNATIONAL] 6 sources
    Anak Krakatau raised to Level III alert after July eruption

    Indonesia’s Geological Agency raised Anak Krakatau to Level III alert on July 2‑3, 2026, after a surge in volcanic earthquakes and a 200‑m ash‑column eruption, imposing a 3‑km exclusion zone for residents and游客

  30. [POLITICS] 2 sources
    Gunung Merapi Climbing Remains Closed as Activity Stays at Alert Level III

    Gunung Merapi remains at Alert Level III, keeping climbing routes closed; Yogyakarta’s governor urges tourists to wait, citing safety zones and BPPTKG guidance.

  31. [POLITICS] 4 sources
    Merapi climbing routes remain closed amid ongoing volcanic alert

    BTNGM confirms Merapi climbing trails stay closed as the volcano remains at Alert level, rejecting viral claims of reopening and urging reliance on official safety updates.

  32. [INTERNATIONAL] 4 sources
    Mount Semeru erupts, ash plume 1 km high, alert issued

    On 28 June 2026, Mount Semeru in Indonesia erupted four times, sending ash up to 1 km high; officials raised the alert to Level III and warned people to avoid the crater and nearby river valleys because of ash,

  33. [HEALTH] 2 sources
    Indonesia's Lewotobi Laki-Laki and Ili Lewotolok volcanoes erupt

    On 26 June 2026, Indonesia's Lewotobi Laki‑Laki erupted with a 1.2 km ash plume, while nearby Ili Lewotolok logged 59 eruptions, prompting Level II warnings and exclusion zones for locals and tourists.

  34. [INTERNATIONAL] 2 sources
    June 2026 volcanic activity surge spans Iceland, Indonesia, Italy and Central America

    June 2026 saw new unrest at Bárðarbunga, Dempo, Etna and others, plus ongoing eruptions in Guatemala, Mexico, Indonesia and elsewhere, prompting alerts but no major urban threats.

  35. [HEALTH] 2 sources
    Mount Semeru eruption injures sand miner, prompts evacuations in East Java

    Mount Semeru erupted, sending ash 4.5 km up and pyroclastic flows that burned sand miner Very Irawan over 80% of his body; one person injured and residents evacuated in East Java.

  36. [INTERNATIONAL] 2 sources
    Indonesia's Merapi and Semeru volcanoes stay on alert

    Indonesia's Merapi and Semeru volcanoes remain at alert level 3, with ongoing eruptions, ash plumes and seismic activity, but no reported damage.

  37. [INTERNATIONAL] 2 sources
    Indonesia's Eastern Volcanoes Erupt Simultaneously

    Three Indonesian volcanoes—Mount Dukono, Ibu and Lewotobi Laki‑laki—erupted on 12 June, sending 400‑500 m ash plumes; alerts issued and nearby residents advised to stay clear.

  38. [INTERNATIONAL] 2 sources
    Lewotobi Laki‑Laki volcano erupts in Indonesia, ash plume reaches 1,000 m

    Lewotobi Laki‑Laki volcano in Indonesia erupted on 10‑11 June 2026, sending a 1,000 m ash plume. Authorities warn people to stay 5 km away, wear masks and watch for lahars.

  39. [INTERNATIONAL] 3 sources
    Indonesia's Merapi and Semeru volcanoes erupt, spewing ash and pyroclastic clouds

    Mount Merapi sent a 2 km pyroclastic cloud on 9 June, while Mount Semeru produced a 1,200 m ash plume on 10 June; both eruptions prompted safety warnings for nearby residents.

  40. [HEALTH] 2 sources
    Authorities Urge Mask Use as Ash Fall Hits East Flores, Indonesia

    PVMBG urged East Flores residents to wear masks after Gunung Lewotobi's ash eruption, warned to stay 5 km away, and cautioned about lahar flood risks.

  41. [HEALTH] 3 sources
    Lewotobi Laki-Laki volcano erupts, ash column reaches 2,500 m in Indonesia

    Lewotobi Laki‑Laki volcano erupted on June 5, 2026, sending ash 2,500 m high; a Level III alert restricts a 5 km radius, advises masks, and warns of lahars.

  42. [INTERNATIONAL] 2 sources
    Mount Slamet's alert zone cut to 2 km amid continued volcanic warnings and extreme weather threats

    Indonesia's Mount Slamet alert zone was cut to 2 km while the volcano stays at Level II; authorities also warn of heavy rain, high seas and flood risks in Central Java.

  43. [INTERNATIONAL] 2 sources
    Gunung Semeru erupts to 1,000 m, authorities issue safety warnings in East Java

    Gunung Semeru erupted on 25 May 2026, reaching a 1 km ash column; PVMBG set Alert Level III and barred activity within several kilometres due to hot clouds, lava falls and lahars.

  44. [INTERNATIONAL] 2 sources
    Indonesia raises Lewotobi Laki‑laki volcano to Level III alert

    Indonesia’s PVMBG raised Lewotobi Laki‑laki volcano to Level III on 12 May, citing increased deep quakes, tremor, inflation and ashfall.

  45. [HEALTH] 2 sources
    Mount Semeru erupts repeatedly, officials warn of hot ash and lahars

    Mount Semeru erupted seven times, sending ash up to 1,200 m and hot clouds 2 km; safety zones imposed.

Sources

antaranews.com · archynewsy.com · bandung24jam.republika.co.id · beautynury.com · berita.rtm.gov.my · beritajatim.com · bukkzserc.hu · burnyourears.de · cafebiz.vn · cafef.vn · clovermedia.jp · cnbcindonesia.com · daerah.sindonews.com · disway.id · ekbis.harianjogja.com · en.antaranews.com · en.tempo.co · halosemarang.id · harianjogja.com · health.chosun.com · inews.id · inponews.com · jateng.sindonews.com · jatim.jpnn.com · jawapos.com · jogja.jpnn.com · jpnn.com · jurnas.com · katadata.co.id · kemendag.go.id · lateoriadelcomplotto.com · life.viva.co.id · m.jpnn.com · majalahindonesia.id · malang-post.com · malutpost.id · medcom.id · mediaindonesia.com · megapolitan.okezone.com · minanews.net · minews.id · n.com.do · news.okezone.com · novagradiska.hr · nu.or.id · okezone.com · otomotif.news.viva.co.id · pemilu2024.harianjogja.com

This summary has been updated 11 times: see revision history