Semeru Eruption Update: 35 Eruptions Today, Thousand Residents Still Refuge

A heavy equipment is used to clean up Semeru's hot cloud material in Lumajang, Friday (11/11/2025). ANTARA/HO-Lumajang Disaster Management Team

JAKARTA - The seismograph instrument at the Mount Semeru Observation Post still recorded 35 eruptions on Saturday, November 22, at around 00.00 a.m. local time. This recording confirms that the status of the highest mountain on the island of Java is still at the highest level, namely Level IV or Alert.

In an official report on the MAGMA Indonesia website, on Saturday morning, the visuals of Mount Semeru were clearly monitored until they were covered in fog level 0'II. The Semeru eruption emitted smoke as high as 1,000 meters from the summit.

Meanwhile, the eruption earthquake was recorded with an amplitude of 922 mm and a duration of 45187 seconds, which showed that the energy supply from depth was still pushing the material to the surface. This condition indicates an instability in the crater cliff, possibly due to the accumulation of material eruptions previously.

The earthquake with an amplitude of 2'8 mm lasted for 44'80 seconds. This gust is a signal of releasing gas pressure from the shallow volcanic system of the volcano, which indicates surface activity is still dynamic.

Meanwhile, cloudy weather in recent hours has the potential to trigger lava flow, especially if it rains at the peak and slopes.

On the other hand, Head of the BNPB Disaster Data, Information and Communication Center Abdul Muhari said that some residents in Lumajang, who had fled, had started to return to their homes, as the situation in the affected areas gradually improved.

Data from the BNPB Operations Control Center noted that the total refugees from the eruption of Mount Semeru were 1,116 people. They are spread across 9 evacuation locations, including the Home of the Head of Sumbermujur Village, Candipuro District Office, Supit Urang Village Pom Mini, Pronojoyo District, Supit Urang 04 Elementary School, SDN Sumber Urip 02 School, Oro-oro Ombo Village Hall, Nurul Jadid Mosque, Supit Urang Village, Sumber Urip Village Bumdes, and Oro-oro Omo Mosque.

In addition to evacuation, BNPB noted that the impact of the Semeru Eruption also caused damage to 22 houses, especially in areas exposed to lava flow and volcanic material. Several houses in Sumbersari Hamlet and Gumuk Mas suffered heavy structural damage and were declared unsafe to be occupied.