Report on Makian (Indonesia) — 2 March-8 March 2016
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 2 March-8 March 2016
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2016. Report on Makian (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 2 March-8 March 2016. Smithsonian Institution and US Geological Survey.
0.32°N, 127.4°E; summit elev. 1357 m
All times are local (unless otherwise noted)
PVMBG reported that seismicity at Makian increased at the beginning of January and was characterized by deep volcanic earthquakes, low-frequency events, and tremor. Tremor amplitude increased at the beginning of March. Gas emissions did not change; weak solfatara emissions continued to rise from the crater floor. The Alert Level was raised to 3 (on a scale of 1-4) on 7 March. Residents and tourists were reminded not to approach the crater within a radius of 1.5 km.
Geologic Background. Makian volcano forms a 10-km-wide island near the southern end of a chain of volcanic islands off the west coast of Halmahera and has been the source of infrequent, but violent eruptions that have devastated villages on the island. The large 1.5-km-wide summit crater, containing a small lake on the NE side, gives the peak a flat-topped profile. Two prominent valleys extend to the coast from the summit crater on the north and east sides. Four parasitic cones are found on the western flanks. Eruption have been recorded since about 1550; major eruptions in 1646, 1760-61, 1861-62, 1890, and 1988 caused extensive damage and many fatalities.