Mount Semeru Erupts Again Tonight, Eruption Height Around 300 Meters
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Mount Semeru in East Java erupted again on Monday (April 27, 2026) at 10:49 PM WIB. In the last week, Mount Semeru has erupted 8 times.
Quoting eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the height of the observed ash column is around 300 meters above the peak or 3,976 meters above sea level.
The ash column was observed to be white to gray in color with moderate intensity towards the west. The eruption of Mount Semeru was still ongoing when this report was made.
(Read: Floods and Forest Fires, the Most Disasters in Indonesia Throughout 2025)
According to the MAGMA Indonesia volcanic activity report, the activity level of Mount Semeru is at Level III (Alert). Earthquake observations on April 27, 2026 from 12:00-18:00 WIB showed 16 eruption/explosion earthquakes with an amplitude of 10-22 millimeters and a duration of 79-148 seconds.
Then, 2 emission earthquakes with an amplitude of 4-5 millimeters and a duration of 65-75 seconds, as well as 1 harmonic earthquake with an amplitude of 2 millimeters and a duration of 666 seconds.
PVMBG advises against carrying out any activities in the southeast sector along the Besuk Kobokan, within 13 kilometers of the peak (eruption center). Outside that 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 lava flows up to 17 kilometers from the peak.
Throughout 2026, MAGMA Indonesia has recorded 1,700 volcanic eruptions/explosions across Indonesia. Mount Semeru in East Java has the most eruptions with 878 occurrences.
(Read: Indication of Forest Fire Area in East Kalimantan until June 2025)
"Disclosure: This is an AI-generated translation of the original article. We strive for accuracy, but please note that automated translations may contain errors or slight inconsistencies."
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