Public warned to stay clear of Mount Lokon crater danger zone

The Ministry of Energy and Mineral Resources (ESDM) has warned the public, visitors, tourists, and climbers not to engage in activities or approach the area within a 1.5-kilometre radius of Tompaluan Crater at Mount Lokon in Tomohon City, North Sulawesi.

‘Based on comprehensive analysis and evaluation up to 15 May 2026, the activity level of Mount Lokon remains at Level II (Alert),’ said Acting Head of the Geological Agency Lana Saria.

Instrumental observations recorded 33 eruption earthquakes, 54 shallow volcanic earthquakes, seven deep volcanic earthquakes, and 98 distant tectonic earthquakes between 1-15 May 2026.

Visual observations showed thin white steam emissions with a maximum height of about 25 metres above the crater. Fire glows were also observed at the crater base on 15 May 2026.

Vulcanic activity based on visual and seismic data has not shown any increase.

Meanwhile, current potential hazards include the possible release of toxic gases from the crater at any time.

Additionally, phreatic eruptions, caused by contact between hot magma vapour and hydrothermal water, could occur suddenly.

‘Communities living along rivers originating from the peak of Mount Lokon should remain vigilant for possible lahars during the rainy season or prolonged heavy rainfall in the peak area,’ she added.