September 28, 2018 Earthquake: Sulawesi, Indonesia

Ref #12235, 12237, 12246, 12252, 12254, 12262:

A powerful M 7.4 earthquake occurred on 28 September 2018, 17.02 hrs UTC+7 in Central Sulawesi Indonesia. The earthquake epicentre was located 26 km north to the Donggala Regency. Based on the location of the epicentre and depth of hipocentre, the earthquake was resulted due to Palu Koro fault. According to the observed fault movement, the earthquake was generated due to deformation with a strike-slip mechanism (BMKG)[...] A total of 170 aftershocks have occurred after the Donggala M 7.4 earthquake as at 30/9/2018 at 00:00 (UTC+7).

The earthquake, tsunami and liquefaction disasters that hit 4 regions in Central Sulawesi, namely the City of Palu, Donggala, Sigi and Parigi Moutong, were directly affected by the disaster. The impact of the disaster until Sunday (10/21/2018) at 13.00 WIB, recorded 2,256 people died. Its distribution in Palu City 1,703 people died, Donggala 171 people, Sigi 366 people, Parigi Moutong 15 people and Pasangkayu 1 person. All victims have been buried. A total of 1,309 people were missing, 4,612 people were injured and 223,751 people were displaced in 122 points.

Many buildings and infrastructure were destroyed by the disaster. Damage included 68,451 housing units, 327 worship houses, 265 school units, 78 units of offices, 362 units of shops, 168 cracks, 7 bridges and so on. Of the Rp. 13.82 trillion economic impact caused by the disaster, the loss reached Rp. 1.99 trillion and the damage reached Rp. 11.83 trillion

Ref #13456:

The September 28, 2018, M 7.5 earthquake near Sulawesi, Indonesia occurred as a result of strike-slip faulting at shallow depths within the interior of the Molucca Sea microplate, part of the broader Sunda tectonic plate. Focal mechanism solutions for the earthquake indicate rupture occurred on either a left-lateral north-south striking fault, or along a right-lateral east-west striking fault. Eastern Indonesia is characterized by complex tectonics in which motions of numerous small microplates are accommodating large-scale convergence between the Australia, Sunda, Pacific, and Philippine Sea plates. At the location of the September 28th earthquake, the Sunda plate moves south with respect to Molucca Sea plate at a velocity of about 30 mm/year.

The towns of Balaroa and Petobo were submerged due to liquefaction. A tsunami with an estimated wave height of 7 m was observed at Palu. Damage estimated at 911 million US dollars.

Ref #12363:

Its epicentre was located about 80 km north of the city of Palu. The earthquake ruptured along the Palu-Koro fault, a strike-slip left-lateral fault with a geodetic slip rate of 42mmyr, a record of large earthquakes with magnitudes from 7 to 8 and previously identified seismic hazard.

Ref #12652:

rupture[...]caused permanent subsidence of approximately 1 m near the bay area of Palu City.

Donggala port, major damage to port facilities and buildings was observed due to lateral spreading of the ground, evidence of liquefaction was noted.

Ref #12715:

Based on the final count reported by the Central Sulawesi Governor, Longki Djanggola, to the National Disaster Management Agency (BNPB) The victim of Palu EQ and Tsunami: 4340 dead, 10679 injured, 667 missing

Ref #12479:

As many as 3,879 people were killed in the earthquake, tsunami and liquefication that struck Palu, Central Sulawesi on September 28th 2018. From the total number of casualties, it was suspected that 1,252 victims were killed in the tsunami.

Ref #12480:

killed about 4,340

Ref #12593:

almost 80 percent of the total casualties was [due to] the large flowslides that occurred in densely populated residential areas.

Ref #12532:

US$1.5 billion in losses