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Report on Ranakah (Indonesia) — November 1989

Scientific Event Alert Network Bulletin, vol. 14, no. 11 (November 1989)
Managing Editor: Lindsay McClelland.

Ranakah (Indonesia) Dome growth apparently ended; solfatara plume

Please cite this report as:

Global Volcanism Program, 1989. Report on Ranakah (Indonesia). In: McClelland, L. (ed.), Scientific Event Alert Network Bulletin, 14:11. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198911-264071.

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Ranakah

Indonesia

8.62°S, 120.52°E; summit elev. 2350 m

All times are local (unless otherwise noted)


In November 1989, a white plume rose to 25 m above the solfatara field between the new Anak Ranakah dome and the older [Gunung] Ranakah. A seismograph recorded 121 distant and 15 local tectonic earthquakes, eight A-type and two B-type shocks, and 87 collapse events.

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.

Information Contacts: VSI.