SEISMIC ACTIVITY AT GUNTUR VOLCANO, WEST JAVA, INDONESIA

HANDLE Web Site 1 Citations Open Access

Bibliographic Information

Other Title
  • インドネシア・グントール火山における地震活動
  • インドネシア グントール カザン ニ オケル ジシン カツドウ

Search this article

Abstract

Guntur volcano is an andesitic volcano, located in West Jawa, Indonesia. The last eruption occurred in 1843 and no eruptions have occurred since then, however, seismic activity has been active. A seismic network composed of 4 stations has been operated since October, 1994, in the collaborative study between Sakurajima Volcanological Observatory, DPRI, Kyoto University and Volcanological Survey of Indonesia, DGGMR, Indonesia. Seismic signals are transmitted to Guntur Volcano Observatory and recorded in data loggers in which timing system is calibrated by GPS. Locations of hypocenters are calculated assuming a homogeneous half space of Vp = 2.76 km/s determined previously. Hypocenters are distributed at depth of 0 to 4 km beneath sea level around Guntur crater, 0 to 2 km beneath west of Guntur crater and at depth of < 10 km around Kamojang caldera. The hypocentral locations are calibrated by adding 7 stations temporarily during December 1995 to February 1996. The result of calibration shows Vp value of 2.76 km/s is acceptable as velocity of P-wave in determination of hypocenters by using 4 permanent stations and assuming homogeneous half space. The hypocenters seem to be distributed vertically beneath Guntur crater and aligned along faults near Kamojang caldera. Magnitude of earthquakes in the cylindrical zone beneath Guntur crater is < 0.7 and that out of the zone is < 3. This suggests the rock beneath the crater was highly fractured by previous eruptions.

Journal

Citations (1)*help

See more

Details 詳細情報について

Report a problem

Back to top