Report on Ranakah (Indonesia) — 4 April-10 April 2012
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 4 April-10 April 2012
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2012. Report on Ranakah (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 4 April-10 April 2012. Smithsonian Institution and US Geological Survey.
8.62°S, 120.52°E; summit elev. 2350 m
All times are local (unless otherwise noted)
CVGHM reported that during January-8 April white plumes rose 10-15 m above the Anak Ranakah lava dome and seismicity decreased. On 9 April the Alert Level was lowered to 1 (on a scale of 1-4).
Geologic Background. A new lava dome, named Anak Ranakah (Child of Ranakah) was formed in 1987 in an area without previous historical eruptions at the base of the large older lava dome of Gunung Ranakah. An arcuate group of lava domes extending westward from Gunung Ranakah occurs on the outer flanks of the poorly known Poco Leok caldera on western Flores Island. Pocok Mandosawa lava dome, at 2350 m the highest point on the island of Flores, lies west of Anak Ranakah.