Citarik Fault

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
EtymologyCitarik River
CountryIndonesia
RegionWest Java
CitiesBogor, Depok, Bekasi
Characteristics
SegmentsSouth, Central, North
Length250km
Tectonics
StatusActive
Earthquakes1833 Java Earthquake
TypeStrike-Slip
MovementLateral
AgeMiocene

Tectonical history

At 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.

Characteristics

This fault is an 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

This 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

This 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

References
  1. "DINAMIKA SESAR CITARIK". Jurnal Geologi Dan Sumberdaya Mineral. 18 (3): 149–162. 6 June 2008. Retrieved 14 December 2023.
  2. "6 Sesar Aktif di Jawa Barat, Tidak Hanya Sesar Cimandiri dan Sesar Baribis". Kompas.com. 23 November 2022. Retrieved 14 December 2023.
  3. "Gempa Bumi Kalapanunggal, Sukabumi: Satu Bukti Aktivitas Sesar Citarik". Niaga.Asia. 11 March 2020. Retrieved 14 December 2023.
  4. "Gempa Bumi Belasan Kali Terjadi di Perbatasan Sukabumi, Bogor, Banten: Sesar Citarik Menggeliat". Tribun Jabar. 7 December 2023. Retrieved 14 December 2023.
  5. "Indonesia's Historical Earthquakes Modelled examples for improving the national hazard map". Researchgate. January 2015. Retrieved 14 December 2023.
  6. "Sesar Citarik, Sesar Aktif Gempa Dekat Bogor, Jakarta dan Bekasi". Viral BEKASI. 25 November 2022. Retrieved 14 December 2023.
  7. "Tanah Lunak Jakarta Perbesar Guncangan Gempa, BNPB Minta DKI Cek Bangunan". detiknews. 8 July 2020. Retrieved 14 December 2023.
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