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Report on Ranakah (Indonesia) — April 1988

Scientific Event Alert Network Bulletin, vol. 13, no. 4 (April 1988)
Managing Editor: Lindsay McClelland.

Ranakah (Indonesia) Continued lava extrusion

Please cite this report as:

Global Volcanism Program, 1988. Report on Ranakah (Indonesia). In: McClelland, L. (ed.), Scientific Event Alert Network Bulletin, 13:4. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198804-264071.

Volcano Profile |  Complete Bulletin


Ranakah

Indonesia

8.62°S, 120.52°E; summit elev. 2350 m

All times are local (unless otherwise noted)


Lava production . . . continued in April. When geologists visited the volcano on 15 April, the summit of the lava dome had reached ~ 2,190 ± 10 m above sea level, an increase of ~50 m since late January. Lava extrusion has occurred primarily to the N, into the Wai Reno drainage. Very little growth of the lava dome has occurred to the W, E, or S. Rockfall avalanches from the growing dome occurred at the rate of ~90/day during April.

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.