Early Days of the Day, 5.2 Earthquake SR Shook South Banten Sunday, October 14 2018

  • 2018.10.15 Monday
  • 18:17

 

ESDM Communication Team

 

 

JAKARTA - The Meteorology, Climatology and Geophysics Agency (BMKG) informed this early Sunday, October 14, 2018, at 2:38 a.m., an earthquake shook South Banten. The earthquake with a magnitude of 5.2 on the Richter Scale (SR) centered on coordinates 105.26? BT and 9.0? LS, at a depth of 10 km. According to the Center for Volcanology and Geological Disaster Mitigation (PVMBG), the Geological Agency of the Ministry of Energy and Mineral Resources (ESDM) of the earthquake occurred due to fault reactivation caused by the oceanic lithosphere which approached the subduction zone and bent into deep sea trenches.

 

"Based on information from the Meteorology, Climatology and Geophysics Agency (BMKG), the epicenter is located at coordinates 105.26? BT and 9.0? LS, with a magnitude of 5.2 at a depth of 10 km, located 292 km southwest of Lebak, Banten. Based on information from The United States Geological Survey, the United States reported that the epicenter was at coordinates 8,955? LS and 105,369? BT, with an magnitude of M 5.0 and a depth of 4.1 km, "said the release received from PVMBG.

 

The geological conditions of the area adjacent to the epicenter of the earthquake, namely the southern coast of Banten, are generally composed of tertiary sedimentary rocks, and quaternary rocks in the form of volcanic rocks and sedimentary rocks and alluvium deposits. Earthquake shocks will usually feel stronger in Quaternary rocks and Tertiary rocks that have weathered because they are disintegrated, detached, not compact and strengthen the shock effect.

The earthquake is centered on the Indo-Australian oceanic plate, outside the subduction zone or called an earthquake outer rise. An earthquake occurs due to fault reactivation caused by an oceanic lithosphere that approaches the subduction zone and bends into a deep sea trench.

 

Based on information from GeoForschungsZentrum (GFZ) Germany, this earthquake-causing fault has a normal fault mechanism with a northwest-southeast orientation.

 

PVMBG ensured that this earthquake did not trigger a tsunami because even though the epicenter was in the sea, the energy was not strong enough to generate a tsunami.

 

The community is encouraged to remain calm and follow the directions and information from the local BPBD officer. Do not be provoked by irresponsible issues regarding earthquakes and tsunamis, however PVMBG still asks the community to remain vigilant with the occurrence of aftershocks, which are estimated to have a smaller power. (k)

 

 

 

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