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10/2003 (BGVN 28:10) Volcanic seismicity that began in March increased in October
12/2003 (BGVN 28:12) During late 2003, 1-9 earthquakes per day at this Javanese volcano
10/2003 (BGVN 28:10) Volcanic seismicity that began in March increased in October
Data from the Volcanological Survey of Indonesia (VSI) indicated a tectonic and volcanic earthquake at Cereme on 25 March, followed by one more volcanic event on 28 March. Activity picked up on 2 April with three more volcanic events, with 17 events through 14 April. Daily highs of 8 and 11 events were recorded on 24 April and 3 May, respectively (2-4 May had 22). Seismicity remained generally low (0-3/day) until 29 events occurred on 7 October.
After a felt earthquake on 7 October, volcanic earthquakes increased. This increased seismicity was accompanied by elevated visually observed activity, resulting in the hazard status being upgraded to Alert Level 2 on 13 October. Seismic activity during 6-12 October consisted of 46 deep volcanic earthquakes and 15 shallow volcanic earthquakes; 36 deep volcanic events occurred the following week of 13-19 October. There was a felt earthquake on 19 October that lasted for 95.5 seconds (35 mm amplitude). Seismic activity declined during 20-26 October, when only seven deep volcanic earthquakes were recorded. The temperature measured at the Sangkan Hurip hotspring in late October was 48°C, unchanged from previous measurements.
Information Contacts: Dali Ahmad, Hetty Triastuty, Nia Haerani, and Suswati, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (Email: dali@vsi.esdm.go.id; URL: http://www.vsi.esdm.go.id/); Darwin Volcanic Ash Advisory Centre (VAAC), Bureau of Meteorology, Northern Territory Regional Office, PO Box 40050, Casuarina, NT 0811, Australia (URL: http://www.bom.gov.au/info/vaac/; Email: a.tupper@bom.gov.au).
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12/2003 (BGVN 28:12) During late 2003, 1-9 earthquakes per day at this Javanese volcano
Ongoing seismicity continued during 27 October-30 November 2003 (table 1). The number of A-type volcanic earthquakes peaked during 3-9 November (53 events). Hot spring temperature measurements were 47°C at Sangkan Hurip, 50°C at Cilengkrang, and 43°C at Ciniru. No significant visual activity was reported, and the hazard status remained at Alert Level 2 (on a scale of 1-4).
Table 1. Seismicity registered at Cereme, 27 October-30 November 2003. Courtesy of VSI.
Dates (2003) Volcanic Volcanic Tectonic
type-A type-B
27 Oct-02 Nov 11 2 7
03 Nov-09 Nov 53 1 6
10 Nov-16 Nov 17 0 6
17 Nov-23 Nov 8 0 3
24 Nov-30 Nov 4 0 8
Information Contacts: Dali Ahmad, Hetty Triastuty, Nia Haerani, and Suswati, Vulcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (Email: dali@vsi.esdm.go.id; URL: http://www.vsi.esdm.go.id/).