Analysis of fault patters based on earthquake data on the land of Sumatera island

Basid, Abdul and Munir, B. (2021) Analysis of fault patters based on earthquake data on the land of Sumatera island. Presented at The 1st International Conferences on Physics Issues (ICoPIs 2021), Palu, 28 Aug 2021.

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Abstract

Geodynamics of Sumatra is interesting to study because of the unique geological setting and high seismicity. This high seismicity is caused by the many faults found on land and in the surrounding waters. This paper presents the results of research that aims to determine fault patterns both on land and in the waters around Sumatra based on earthquake data from 1960-2000. The area under study is at the coordinates of 6°N - 6°S and 95°E - 109°E at an epicenter depth of <60 km with a magnitude between 4-10. The area is divided into two zones, namely the front arc and the Barisan arc. Data were obtained from ISC and Global CMT. By using the Focal Mechanism Method, the results show that the fault pattern in the Sumatran forearc Basin zone is dominated by an Reverse Fault located in the accretion zone while on the mainland of Sumatra it is dominated by Strike Slip along the Sumatran Fault System. By knowing the position and pattern of the fault, especially on the mainland of the island of Sumatra, it can be used as a reference for spatial planning. In addition, further studies will also be able to learn about the dangers or disasters caused by the fault pattern.

Item Type: Conference (Paper)
Subjects: 04 EARTH SCIENCES > 0404 Geophysics > 040404 Geothermics and Radiometrics
04 EARTH SCIENCES > 0404 Geophysics > 040499 Geophysics not elsewhere classified
02 PHYSICAL SCIENCES > 0299 Other Physical Sciences
04 EARTH SCIENCES > 0404 Geophysics
Divisions: Faculty of Mathematics and Sciences > Department of Physics
Depositing User: Mr Abdul Basid
Date Deposited: 07 Mar 2022 13:05

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