Mount Semeru Erupts Again Tonight (Friday, 31 July 2026)
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Mount Semeru in East Java erupted again at 00:39 WIB on Friday (31/7/2026). It has erupted 16 times in the past week.
According to eruption data from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia app, observed ash column reached 500 meters above the summit (4176 masl).
Ash column appeared white to grey with moderate intensity, drifting northeast. The eruption was ongoing when this report was published.
(Read: Trend of Volcanic Eruptions in Recent Years)
Per MAGMA Indonesia activity reports, Mount Semeru is at Activity Level III (Alert). Seismic monitoring on 31 July 2026 18:00-23:59 WIB recorded 21 eruption earthquakes, 2 landslide quakes, and 4 gas emission tremors.
PVMBG advises against all activity in the southeast sector along Besuk Kobokan within 13km of the summit, plus 500m exclusion zone along this river bank outside that radius due to pyroclastic flow and lahar risks.
During 2026, MAGMA Indonesia logged 3624 volcanic eruptions nationwide; Mount Semeru recorded the highest count at 1503 eruptions.
(Read: Indonesia Ranks First Globally for Most Active Volcanoes)
"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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