Report on Ciremai (Indonesia) — 29 October-4 November 2003
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
29 October-4 November 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, 29 October-4 November 2003. Smithsonian Institution and US Geological Survey.
6.895°S, 108.408°E; summit elev. 3039 m
All times are local (unless otherwise noted)
DVGHM raised the Alert Level at Cereme to 2 (on a scale of 1-4) on 13 October after increases in seismic and volcanic activity. During 13-19 October, the seismic network recorded 36 deep-volcanic earthquakes. Seismicity decreased during 20-26 October, with 7 deep-volcanic earthquakes recorded.
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.