Report on Gamkonora (Indonesia) — 29 June-5 July 2022
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
29 June-5 July 2022
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2022. Report on Gamkonora (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 29 June-5 July 2022. Smithsonian Institution and US Geological Survey.
1.38°N, 127.53°E; summit elev. 1635 m
All times are local (unless otherwise noted)
PVMBG reported that diffuse white plumes rose 20-60 m above Gamkonora’s summit were visible during 1 January-29 June, and no other changes were observed. Deep and shallow volcanic earthquakes were rarely recorded. On 30 June the Alert Level was lowered to 1 (on a scale of 1-4). Residents and tourists were asked not to venture near the crater within a radius of 1 km.
Geological Summary. The shifting of eruption centers on Gamkonora, the highest peak of Halmahera, has produced an elongated series of summit craters along a N-S trending rift. Youthful-looking lava flows originate near the cones of Gunung Alon and Popolojo, south of Gamkonora. Since its first recorded eruption in the 16th century, typical activity has been small-to-moderate explosive eruptions. Its largest historical eruption, in 1673, was accompanied by tsunamis that inundated villages.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)