Earthquake Statistics: b-Value Spatial Distribution in Indonesia
Abstract
Indonesia region is located among Eurasia plate, Indo-Australian plate and Pacific plate, hence has been affected by earthquakes activity. Indonesia region is one of the most seismically and tectonically active regions in the world, so identification of the seismogenic source zones is very importance for mapping the disaster prone area. Earthquake catalogue have been collected from national (BMKG) and international data (USGS) centers. The seismogenic source zones that might affect the Indonesia region are defined more precisely depending on distribution of earthquakes, and seismicity rate (a- and b-values). The main goal of this study is to analyze the regional and temporal seismicity in the Indonesia region. Statistical analysis of the earthquake data to obtain a reliable relation the b-values and their temporal changes relate to the earthquake potential of the region. The area of high b-values indicate a relative low stress regime resulting from the stress release by the earthquakes, the area of low b-values indicate relatively higher stress regime. The spatial distribution maps of b-value reveal that the Indonesia region consists of some main high seismic activity zones named which are described in detail with their relationship to regional tectonics. These results are valuable for seismic hazard assessment of the Indonesia region for earthquake-resistant structures of developmental and urbanization projects.
Key Words: Seismicity, Earthquake, seismotectonic, Indonesia- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.S43F0657S
- Keywords:
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- 7299 General or miscellaneous;
- SEISMOLOGY