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The Citarik Fault is a
strike-slip fault In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tecton ...
that cuts across Western Java,
Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
, passing through
Pelabuhan Ratu Palabuhanratu or Pelabuhan Ratu ( Sundanese for: 'Harbor of the Queen') is a district and fishing town which serves as the regency seat of Sukabumi Regency. It is at the southwest coast of Palabuhanratu Bay, West Java facing the Indian Ocean. ...
,
Bogor Bogor ( su, , nl, Buitenzorg) is a city in the West Java province, Indonesia. Located around south of the national capital of Jakarta, Bogor is the 6th largest city in the Jakarta metropolitan area and the 14th overall nationwide.Bekasi Bekasi (, su, ) is a city in West Java, Indonesia, located on the eastern border of Jakarta.the city of planet Bekasi is his nickname.It serves as a commuter city within the Jakarta metropolitan area. According to the 2020 Census by Statist ...
. It is a long crack in the earth’s crust where two
tectonic plates Plate tectonics (from the la, label=Late Latin, tectonicus, from the grc, τεκτονικός, lit=pertaining to building) is the generally accepted scientific theory that considers the Earth's lithosphere to comprise a number of large t ...
move past each other. The fault has been active since the Middle Miocene period, about 15 million years ago.


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 The Plio-Pleistocene is an informally described geological pseudo-period, which begins about 5 million years ago (Mya) and, drawing forward, combines the time ranges of the formally defined Pliocene and Pleistocene epochs—marking from about 5& ...
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.


Activity

This fault is not very seismically active, However this fault has caused several damaging
earthquakes An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, fr ...
to occur, such as in March 2020 and December 2023. This fault also possibly has caused a magnitude Mw 7.0 earthquake in 1833.


Seismic hazard

This 250 kilometer long fault passes through and is near densely populated areas such as
Jakarta metropolitan area The Jakarta metropolitan area or Greater Jakarta, known locally as Jabodetabek (an acronym of Jakarta–Bogor– Depok–Tangerang–Bekasi), and sometimes extended to Jabodetabekjur (with the acronym extended to include part of Cianjur Regen ...
which has a population of more than 30 million people. Soft ground conditions around the northern part of the fault such as in
Bekasi Bekasi (, su, ) is a city in West Java, Indonesia, located on the eastern border of Jakarta.the city of planet Bekasi is his nickname.It serves as a commuter city within the Jakarta metropolitan area. According to the 2020 Census by Statist ...
and Jakarta can cause amplification of earthquake shocks.


See also

*
Baribis Fault The Baribis Fault ( id, Sesar Baribis) is a geological feature located in the northern part of Java. This fault, estimated to be long, stretches from Purwakarta to Lebak Regency and is a threat to the Jakarta metropolitan area because the fault ...
*
List of faults in Indonesia Indonesia is a country located close to tectonic plate boundaries which causes it to have many active faults and is prone to earthquakes, Sumatra Great Sumatran Fault Samalanga-Sipopok Fault Mentawai Fault Java Citarik Fault Cimandir ...
*
List of earthquakes in Indonesia __NOTOC__ This is an incomplete list of more recent recorded major earthquakes that have occurred within the boundaries of Indonesia. The determinants of the activity are indicated by the geology of the region, and the volcanic activity. Large nu ...


References

{{reflist Seismic faults of Indonesia Strike-slip faults