Gempatan Activities Down, Mount Marapi West Sumatra Still Has Alert Status

Mount Marapi in Agam Regency and Tanah Datar Regency, West Sumatra Province (West Sumatra). (ANTARA)

JAKARTA - The Geological Agency, Ministry of Energy and Mineral Resources (ESDM) ensures that Mount Marapi in Agam Regency and Tanah Datar Regency, West Sumatra Province (West Sumatra), is still on Alert or Level II status.

"Based on the results of a thorough analysis and evaluation until September 16, 2025, the activity level of Mount Marapi remains at Level II," said Head of the Geological Agency, Ministry of Energy and Mineral Resources Muhammad Wafid in a written statement, Tuesday, quoted by Antara.

This was conveyed by the Geological Agency regarding the results of the evaluation of the activities of Mount Marapi for the period 1 to 15 September 2025. In its report, the Geological Agency conveyed the results of the analysis of the 2.891 meter volcanic activity above sea level (MDPL).

First, eruption activity still occurs with a maximum eruption column height of 1,200 meters from the summit. Blow activity also occurs with a maximum smoke height of 250 meters. Visually, Marapi's activity is still volatile.

During the evaluation period, the Geological Agency noted that seismic activity decreased. The earthquake erupted from six incidents to four times, and the earthquake gusts fell significantly from 109 to 13 times.

In the last two weeks, seismic velocity variations have experienced small junctions/fluctuations around zero. The medium coherence value near the surface is in the range of 0.63-0.80. Both of these data indicate the volcanic body pressure near the surface is relatively small, and the medium condition is still unstable.

In addition, the Geological Agency also reports that the emission rate (flux) of sulfur dioxide (S02) is often not measured by the Sentinel satellite which is suspected to be due to a cloud-covered volcano. Finally, it was measured on September 11, 2025, amounting to 23 tons/day or still relatively low.

"Based on the evaluation of data on monitoring the activities of Mount Marapi, it is still dynamic or fluctuating," he said.

Wafid reminded that the potential for volcanic eruptions is still there considering that there are still indications of fluid/magma supply from the depths of the mountain body. This means that the community is still obliged to comply with all recommendations issued by the Center for Volcanology and Geological Disaster Mitigation.