Mamasa Earthquake 5.1 Magnitude Associated with Saddang Fault Friday, November 9, 2018 18

  • 2018.11.09 Friday
  • 17:16


EMR Communication Team


JAKARTA - Mamasa, West Sulawesi, shook the earthquake again on Thursday evening (8/11) at 8:40 p.m. WIB. The earthquake has a magnitude of 5.1 at a depth of 10 kilometers, and is 11 km northeast of Mamasa. This earthquake did not cause a tsunami because the source was on land.

The Center for Volcanology and Geological Disaster Mitigation (PVMBG) of the Geological Agency estimates that the occurrence of this earthquake was associated with the activity of the Saddang Fault located around the area.


"Based on the location of the epicenter and its depth, we estimate the occurrence of this earthquake to be associated with the Saddang Fault activity around the area which is relatively northwest - southeast," said PVMBG Head Kasbani.


According to PVMBG, the geological conditions of the area around the earthquake are composed of sedimentary and metamorphic rocks (metamorphic rocks) of Pre-Tertiary age which form a fault line with steep slopes and are mostly weathered. Kasbani said that rocks that are weathered, broken, loose, and not yet compact can be reinforcing earthquakes.

In addition, PVMBG also released that the greatest intensity of earthquake shocks will be felt in areas adjacent to the epicenter of the earthquake and the intensity will be further weakened as the distance from the epicenter increases. Based on BMKG data, earthquake shocks are felt in Mamasa with intensity IV MMI (Modified Mercalli Intensity); Mamuju, Toraja, Toraja Utara, Majene, and Polewalimandar III MMI; and Pasangkayu II MMI.


PVMBG encourages people to remain calm and follow the directions and information from BPBD officers. "People should not be provoked by irresponsible issues regarding the earthquake and tsunami and remain vigilant with the occurrence of aftershocks, which are expected to be of smaller magnitude," said Kasbani. (sk)