Mount Semeru Erupts Again Tonight (Thursday, February 5, 2026)

Mount Semeru in East Java erupted again on Thursday (February 5, 2026) at 18:27 WIB. In the past week, Mount Semeru has erupted 33 times.

Quoting eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the height of the ash column observed is around None meters above the peak (None meters above sea level).

Eruption visuals were not observed. The eruption of Mount Semeru is still ongoing when this report was made.

(Read: West Kalimantan Produces the Most CO2 Emissions from Forest and Land Fires Until July 2023)

According to the MAGMA Indonesia volcano activity report, the activity level of Mount Semeru is at Level III (Alert). Earthquake observations on February 5, 2026 from 12:00-18:00 WIB showed 21 eruption/explosion earthquakes with an amplitude of 15-22 millimeters and a duration of 69-129 seconds.

Then, 2 emission earthquakes with an amplitude of 4-6 millimeters and a duration of 45-51 seconds, as well as 1 distant tectonic earthquake with an amplitude of 40 millimeters, s-p 16 seconds, and a duration of 104 seconds.

PVMBG advises against any activities in the southeast sector along the Besuk Kobokan, within 13 kilometers of the peak (eruption center). Outside this distance, residents should not carry out activities within 500 meters of the riverbank along the Besuk Kobokan due to the potential for being affected by the expansion of hot clouds and lahar flows up to 17 kilometers from the peak.

In 2026, MAGMA Indonesia has recorded 486 volcanic eruptions across Indonesia. Mount Semeru in East Java has the most eruptions with 257 events.

(Read: Indication of Forest and Land Fire Area in West Kalimantan Province 2016-2025)