The Citarik Fault is a strike-slip fault that cuts across Western Java, Indonesia, passing through Pelabuhan Ratu, Bogor and Bekasi. It is a long crack in the earth's crust where two tectonic plates move past each other. The fault has been active since the Middle Miocene period, about 15 million years ago.
| Citarik Fault | |
|---|---|
| Etymology | Citarik River |
| Country | Indonesia |
| Region | West Java |
| Cities | Bogor, Depok, Bekasi |
| Characteristics | |
| Segments | South, Central, North |
| Length | 250km |
| Tectonics | |
| Status | Active |
| Earthquakes | 1833 Java Earthquake |
| Type | Strike-Slip |
| Movement | Lateral |
| Age | Miocene |
Tectonical history
editAt first, the Citarik Fault was a transtensional fault, meaning that the plates were moving apart and creating space for new crust to form. However, since the Plio-Pleistocene period, about 5 million years ago, the fault has changed into a left strike-slip fault, meaning that the plates are sliding horizontally past each other in opposite directions.[citation needed]
Characteristics
editThis fault is a Left-Lateral Strike-Slip type fault and has a length of about 250 km, However this fault is segmented and divided into three segments: the southern, central, and northern segments, each with different characteristics and seismic potentials.[1][2]
Activity
editThis fault is not very seismically active, However this fault has caused several damaging earthquakes to occur, such as in March 2020 and December 2023.[3][4] This fault also possibly has caused a magnitude Mw 7.0 earthquake in 1833.[5]
Seismic hazard
editThis 250 kilometer long fault passes through and is near densely populated areas such as Jakarta metropolitan area which has a population of more than 30 million people.[6] Soft ground conditions around the northern part of the fault such as in Bekasi and Jakarta can cause amplification of earthquake shocks.[7]
See also
editReferences
edit- ^ "DINAMIKA SESAR CITARIK". Jurnal Geologi Dan Sumberdaya Mineral. 18 (3): 149–162. 6 June 2008. Retrieved 14 December 2023.
- ^ "6 Sesar Aktif di Jawa Barat, Tidak Hanya Sesar Cimandiri dan Sesar Baribis". Kompas.com. 23 November 2022. Retrieved 14 December 2023.
- ^ "Gempa Bumi Kalapanunggal, Sukabumi: Satu Bukti Aktivitas Sesar Citarik". Niaga.Asia. 11 March 2020. Retrieved 14 December 2023.
- ^ "Gempa Bumi Belasan Kali Terjadi di Perbatasan Sukabumi, Bogor, Banten: Sesar Citarik Menggeliat". Tribun Jabar. 7 December 2023. Retrieved 14 December 2023.
- ^ "Indonesia's Historical Earthquakes Modelled examples for improving the national hazard map". Researchgate. January 2015. Retrieved 14 December 2023.
- ^ "Sesar Citarik, Sesar Aktif Gempa Dekat Bogor, Jakarta dan Bekasi". Viral BEKASI. 25 November 2022. Retrieved 14 December 2023.
- ^ "Tanah Lunak Jakarta Perbesar Guncangan Gempa, BNPB Minta DKI Cek Bangunan". detiknews. 8 July 2020. Retrieved 14 December 2023.