Mount Semeru in East Java province unleashed searing clouds of hot ash and a mixture of rock, lava and gas that traveled up to 4.3 miles down its slopes.

Mount Semeru erupted again in East Java on Dec 13, 2025, with 36 eruptions in the last week. The ash column reached 500m.

Mount Semeru erupted again (700m ash plume), 29 times this week. Level III alert. Warnings issued for Besuk Kobokan. Semeru leads Indonesia's 2025 eruptions with 3,007.

The activity was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 182 seconds. In addition to the ash plume, the 3,676-meter-high volcano, the tallest peak on ...

Lumajang, Indonesia — Rescuers evacuated more people Monday from nearby villages after the eruption of Indonesia's Mount Semeru, with officials warning of danger from cooling lava despite less ...

After Mount Semeru in the main Indonesian island of Java erupted on November 19, 2025, social media posts shared old clips of a volcanic mudflow falsely claiming they showed its impact on the ...

Indonesia’s Mount Semeru erupted near villages in East Java's Lumajang district on Saturday, Dec. 4, killing at least 34 people by Dec. 7, the Associated Press reported. More than 100 people were ...

TEMPO.CO, Jakarta - Heruningtyas, Head of the Volcano Disaster Mitigation Team at Indonesia’s Geological Agency under the Ministry of Energy and Mineral Resources, has highlighted the ongoing risk of ...

The volcano has been active recently, having previously erupted on Nov 19 and Dec 5. Read more at straitstimes.com. Read more ...

JAKARTA, Indonesia (AP) — Indonesia’s Mount Semeru, the highest peak on Java island, erupted Wednesday, blanketing several villages with falling ash, prompting evacuations and leading authorities to ...