July 2018 Lombok earthquake

July 2018 Lombok earthquake
Lombok earthquake mosque ruin evacuation.jpg
Lombok earthquake damage.
July 2018 Lombok earthquake is located in Indonesia
July 2018 Lombok earthquake
UTC time2018-07-28 22:47:37
Local date29 July 2018 (2018-07-29)
Local time06:47:37 WITA
Duration10–20 seconds
Magnitude6.4 Mw
Depth14.0 km (8.7 mi)
Epicenter8°16′26″S 116°29′28″E / 8°16′26″S 116°29′28″E / -8.274; 116.491
FaultFlores Back Arc Thrust Fault[1]
TypeReverse fault
Areas affectedWest Nusa Tenggara, Indonesia
Max. intensityVIII (Severe)
Casualties20 dead[3]
401 injured
10,062 displaced[4]
Map of 2018 Lombok earthquakes

A Mw 6.4 earthquake struck the island of Lombok on the morning of 29 July 2018 at a shallow depth of 14 km (8.7 mi).[5] Widespread damage was reported in the area, and authorities confirmed that 20 people were killed in the earthquake while hundreds were injured.[3][6]

The epicentre was located in Sembalun Subdistrict, East Lombok Regency. The earthquake was a foreshock for the more powerful Mw 6.9 earthquake which struck the island a week later.[7]

Tectonic setting

Lombok lies on the destructive plate boundary between the Australian Plate and the Sunda Plate. To the east of Bali the plate boundary starts to involve a collision between the leading edge of the Australian continent and the eastern part of the Sunda Arc and the western end of the Banda Arc.[8] In response to this collision, the arc itself has begun to be pushed over the back-arc Bali Basin along a major thrust fault, the 500 km (310 mi) long Flores Thrust. The Lombok earthquake has been attributed to movement along the Flores Thrust.[1]