Mount Semeru Erupts Again Tonight (Sunday, February 1, 2026)

Mount Semeru in East Java erupted again on Sunday (1/2/2026) at 21:12 WIB. In the last week, Mount Semeru has erupted 41 times.

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

Visual eruption was not observed. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 120 seconds.

(Read: There Were 137 Natural Disaster Incidents Towards the End of January 2024, Most of Them Floods)

According to MAGMA Indonesia's volcano activity report, Mount Semeru's activity level is at Level III (Alert). Seismicity observations on February 1, 2026, at 12:00-18:00 WIB showed 21 eruption earthquakes with amplitudes of 10-22 millimeters and earthquake durations of 70-166 seconds.

Then, 2 exhalation earthquakes with amplitudes of 2-4 millimeters and earthquake durations of 28-60 seconds, and 1 flood vibration earthquake with an amplitude of 8 millimeters and an earthquake duration of 651 seconds occurred.

PVMBG advises against any activity in the southeast sector along Besuk Kobokan, as far as 13 kilometers from the peak (eruption center). Beyond that distance, people should not engage in activities within 500 meters from the riverbank (river boundary) along Besuk Kobokan, as there is a potential for expansion of hot clouds and lava flows up to 17 kilometers from the peak.

Throughout 2026, MAGMA Indonesia has recorded 423 volcanic eruptions across Indonesia. Mount Semeru in East Java has erupted the most with 223 occurrences.

(Read: Almost 300 Natural Disasters Occurred Until Mid-February 2024)