CTBT Science and Technology Conference 2021 (SnT2021)

Identification of Palu-Koro Fault mechanism based on Fault slip and earthquake focal mechanism data

P5.2-050

1 Jul 2021, 09:00

3h

Online

e-Poster T5.2 - Experience with and Possible Additional Contributions to Issues of Global Concern such as Disaster Risk Mitigation, Climate Change Studies and Sustainable Development Goals T5.2 e-poster session

Speaker

Mr Jimmi Nugraha (Indonesian Agency for Meteorology, Climatology and Geophysics (BMKG), Jakarta, Indonesia)

Description

The identification of the Palu-Koro Fault has been conducted. The study method used is a merging scientific discipline of geology and geophysics. Field data acquisition, processing, analysis and modeling in the laboratory using geological and geophysical techniques became the main framework in this study.
Acquisition of geological investigation including fault-slip at 19 points and 30 historical earthquakes data were used to verify the dominant fault type of the earthquake focal mechanism.
The earthquake focal mechanism analysis shows the type of fault that predominantly controls through the Palu area and its surroundings is strike-slip or horizontal fault mechanism.

Promotional text

The focal mechanism parameter of the earthquake provides critical information for vulnerability analysis earthquake and local study tectonic, regional, and global. The focal mechanism is geometric representation shifting fractures at the time when the earthquake happens.