The Pusat Vulkanologi dan Mitigasi Bencana Geologi reported increased volcanic activity at Bur ni Telong, noting a significant increase in deep volcanic earthquakes in July, especially during 22-24 July. This was subsequently followed by an increase in shallow volcanic earthquakes observed during 1-2 August, prompting PVMBG to raise the Alert Level to Level II (on a scale from 1 to 4) at 0600 on 2 August. The public was advised to maintain a minimum distance of 1.5 km from the crater area and to avoid the fumarole and solfatara regions, especially during cloudy or rainy weather.

Geological Summary. The conical Bur ni Telong volcano was constructed at the southern base of the massive Bur ni Geureudong volcanic complex, one of the largest in northern Sumatra. The historically active volcano lies 4.5 km from the summit of Geureudong,and its summit crater has migrated to the ESE, leaving arcuate crater rims. Lava flows are exposed on the southern flank. Explosive eruptions were recorded during the 19th and 20th centuries.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)