Mount Semeru Erupts Again This Afternoon (Wednesday, February 18, 2026)

Mount Semeru in East Java erupted again on Wednesday (February 18, 2026) at 14:38 WIB. In the past week, Mount Semeru has erupted 29 times.

Based on 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 or None meters above sea level.

Eruption visuals were not observed. The eruption was recorded on a seismograph with a maximum amplitude of 21 millimeters and a duration of 101 seconds.

(Read: 4.5 M Earthquake Shakes 14 Km North of San Carlos,)

According to the MAGMA Indonesia volcanic activity report, Mount Semeru's activity level is at Level III (Standby). Earthquake observations on February 18, 2026, from 06:00-12:00 WIB showed 20 eruption/explosion earthquakes with amplitudes of 10-22 millimeters and durations of 46-145 seconds.

Then, 1 emission earthquake with an amplitude of 8 millimeters and duration of 47 seconds, as well as 1 harmonic earthquake with an amplitude of 2 millimeters and duration of 266 seconds.

PVMBG advises against any activities in the southeast sector along Besuk Kobokan, within 13 kilometers of the peak (eruption center). Outside this distance, residents should avoid activities within 500 meters of the riverbank along Besuk Kobokan due to the potential for being affected by expanding hot clouds and lahar flows up to 17 kilometers from the peak.

Throughout 2026, MAGMA Indonesia has recorded 662 volcanic eruptions across Indonesia. Mount Semeru in East Java has the most eruptions with 349 events.

(Read: 4.2 M Earthquake Shakes Fox Aleutian Islands)