The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported increased seismicity at Bur ni Telong. A M 4.3 tectonic earthquake was recorded at 0030 on 25 November and located about 16 km NE of the main crater. The tectonic earthquake was followed by increased seismicity at Bur ni Telong characterized by a total of 18 deep volcanic earthquakes, six local tectonic earthquakes, and six distant tectonic earthquakes recorded during 0000-0600. The Alert Level was raised to 2 (the second lowest level on a scale of 1-4) at 0900 on 25 November. 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)