Report on Ciremai (Indonesia) — 15 October-21 October 2003
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
15 October-21 October 2003
Managing Editor: Gari Mayberry
Please cite this report as:
Global Volcanism Program, 2003. Report on Ciremai (Indonesia). In: Mayberry, G (ed.), Weekly Volcanic Activity Report, 15 October-21 October 2003. Smithsonian Institution and US Geological Survey.
6.895°S, 108.408°E; summit elev. 3039 m
All times are local (unless otherwise noted)
According to news reports, local authorities issued an alert and closed Cereme to the public after detecting unrest. Several earthquakes were recorded on 17 October. Seismicity increased on 18 October, when 18 earthquakes up to M 2 occurred. Seismicity was felt in seven subdistricts of the Cilimus and Pesawahan districts.
Geological Summary. The symmetrical Ciremai stratovolcano is located closer to the northern coast than other central Java volcanoes. A large crater, elongated in an E-W direction and formed by multiple vents, caps the summit of Gunung Ciremai, which was constructed on the northern rim of the 4.5 x 5 km Geger Halang caldera. A large landslide deposit to the north may be associated with the origin of the caldera, although collapse may rather be due to a voluminous explosive eruption (Newhall and Dzurisin, 1988). Eruptions have included explosive activity and lahars, primarily from the summit crater.