Hotspots In The Crater Of Mount Tangkuban Parahu Are Still Stable, But The Eruption Potential Remains

The condition of the Queen of Mount Tangkuban Parahu Crater, Sunday (8/6/2025). BETWEEN/HO Geological Agency.

The latest monitoring of hotspots in the crater area of Mount Tangkuban Parahu shows that conditions are still stable without widening the hot area. However, the potential for a phreatic eruption must still be watched out for.

The Geological Agency, through the Head of the Geological Agency Muhammad Wafid, explained that based on thermal observations using the Macic Pro 3T drone carried out in the Ratu Crater and Ecoma Crater area, there was no expansion of the hot region compared to the scan results on June 5 to 7, 2025.

"Based on the recording of seismic activity, the phenomenon of mud talk in the Queen Crater began to be detected since June 5, 2025 at 22.00 WIB, which was marked by the emergence of continuous tremors," Wafid said in a statement in Bandung, Sunday, as quoted by ANTARA.

Visually, white smoke was observed with thin to moderate intensity coming out of the bottom of the Queen Crater with a height of 5150 meters, as well as from Ecoma Crater about 510 meters. The observed gust pressure was classified as weak to moderate.

"For now, mud activity is only found in Ratu Crater, where black mud deposits are seen around the location," he added.

The seismic activity of Mount Tangkuban Parahu is currently still dominated by continuous tremors. On Sunday, there were three low-frequency (LF) earthquakes and tremors with a maximum amplitude of between 0.5 and 1.5 mm (average of 1 mm). Meanwhile, on June 7, 2025, 16 LF earthquakes and tremors were observed with an amplitude of up to 2 mm.

Monitoring of deformations through EDM and GNSS devices indicates an inflation pattern, or the coupling of the mountain body, which indicates the accumulation of pressure at a shallow depth.

"This is a serious concern because a phreatic eruption can occur suddenly without visually clear or seismic warnings," he explained.

As of June 8, 2025, monitoring the composition of volcanic gas through permanent Multi-GAS tools has not shown any significant changes. The ratio of CO2/SO2, CO2/H2S, and other gas levels is still in the normal range. Measurement data using portable MultiGAS on the west side of the Queen Crater also show a safe concentration of gas.

Taking into account the overall monitoring data, the activity status of Mount Tangkuban Parahu remains at Level I (Normal). However, the public and tourists are still advised not to go down to the bottom of the crater, not to linger in the active zone, and to get away immediately if thick smoke or the smell of strong gas appears.

Although there is currently no significant increase, preparedness must be maintained. Local governments and BPBD are asked to continue to coordinate with the Tangkuban Parahu Volcano Observation Post in Cikole and PVMBG in Bandung.

The public is advised to remain calm and not be provoked by unverified information, and always follow directions from the authorities. Evaluation of mountain activity will be carried out regularly and at any time if there are symptoms of an increase.

Mount Tangkuban Parahu itself is an active volcano that has nine craters, with the Queen Crater and Upas Crater as the main crater at its peak. The last eruption was recorded in 2019, in the form of a phreatic eruption from the Queen Crater.