Integrasi Pengembangan Techno Park dan Mitigasi Bencana Daerah Volcano Hosted Geothermal Cangar, Arjuno-Welirang Berbasis Metode Seismik

Abstract

The integration concept of Technopark development and hazard mitigation has been carried out in Volcano Hosted Geothermal area using Seismic method. The goal of this research was to identified the distribution of microearthquake epicenter and hypocenter and Peak Ground Acceleration (PGA) value which were determined by using particle motion analysis and Kanai method. Data acquisition was conducted at Techno Park development site and Volcano-Geothermal Observatorium Cangar using seismograph TDL-303S and also homemade seismometer based on MEMS. The result of this research, We got the microearthquake epicenter distribution around Cangar hotsprings (hypocenter 4-140 meters) and around Welirang crater (hypocenter 985-2152 meters) associated with faults. PGA value in Cangar ranged from 11.23 gal to 21.8 gal. The range of those values indicated the level of risk due to tectonic earthquakes in the research area categorizes as a safe area, so it can be used to monitoring Arjuno-Welirang activities.