Warning! Mount Semeru Erupted Again This Afternoon (Wednesday, 20 May 2026)
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Mount Semeru in East Java erupted again on Wednesday (20/5/2026) at 11:31 WIB. Over the past week, Mount Semeru has erupted 10 times.
According to eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, no visual eruption was observed. The eruption was recorded on seismographs with maximum amplitude 22 mm and duration 238 seconds.
(Read: Update on Damaged Facilities from Sumatra Floods & Landslides (11 December 2025))
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is set at Activity Level III (Alert). Seismic monitoring on 20 May 2026 between 00:00–06:00 WIB recorded 16 eruption earthquakes with 10–22 mm amplitude and 74–185 second duration.
Additionally, 1 pyroclastic fall earthquake (22 mm amplitude, 231 second duration) and 9 degassing earthquakes (2–8 mm amplitude, 46–84 second duration) were detected.
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan up to 13 km from the summit. Outside this zone, no activity is allowed within 500 m of the Besuk Kobokan river banks, as pyroclastic surges and lahar flows may reach 17 km from the peak.
For 2026, MAGMA Indonesia has logged 2,066 volcanic eruptions nationwide. Mount Semeru (East Java) recorded the highest count at 1,039 eruptions.
(Read: Dozens of Neighbourhood Units in Jakarta Affected by Floods (5 May 2026))
"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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