Warning! Mount Semeru Erupted Again This Afternoon (Monday, 28 September 2026)
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Mount Semeru in East Java erupted again on Monday (28/9/2026) at 14:55 WIB. Over the past week, Mount Semeru has erupted 4 times.
According to eruption data from the Centre for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the eruption plume was not visually observed. This eruption was recorded on seismographs with maximum amplitude 22 mm and duration 115 seconds.
(Read: How Can Residents Identify Clean Air Amid Poor Air Quality?)
Per MAGMA Indonesia volcanic activity reports, Mount Semeru is set at Activity Level III (Alert). Seismic monitoring on 28 September 2026 between 06:00-12:00 WIB recorded 32 eruption earthquakes with 15-22 mm amplitude and 58-188 second duration.
Additionally, 4 emission earthquakes (4-5 mm amplitude, 31-54 second duration) and 2 harmonic tremors (2 mm amplitude, 137-223 second duration) were detected.
PVMBG prohibits all activities in the southeast sector along Besuk Kobokan within 13 km of the summit. Beyond this zone, no activities are allowed within 500 m of the Besuk Kobokan riverbanks, as pyroclastic surges and lahar flows may reach up to 17 km from the crater.
Throughout 2026, MAGMA Indonesia has logged 4,827 volcanic eruptions across Indonesia. Mount Semeru leads with 1,870 recorded eruptions.
(Read: Jakarta Air Quality Rated Poor, Ranks Below Other ASEAN Capitals)
"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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