July 2018 Lombok earthquake
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 President Joko Widodo inspected the damage in the worst-hit area after an earthquake struck Lombok | |
  | |
| UTC time | 2018-07-28 22:47:37 |
|---|---|
| ISC event | 615000905 |
| USGS-ANSS | ComCat |
| Local date | 29 July 2018 |
| Local time | 06:47:37 WITA |
| Duration | 10–20 seconds |
| Magnitude | 6.4 Mw |
| Depth | 14.0 km (8.7 mi) |
| Epicenter | 8°14′24″S 116°30′29″E / 8.240°S 116.508°E |
| Fault | Flores back-arc thrust fault[1] |
| Type | Dip-slip (reverse) |
| Areas affected | West Nusa Tenggara, Indonesia |
| Max. intensity | MMI VII (Very strong) |
| Landslides | Yes |
| Aftershocks | 564[2] |
| Casualties | 20 fatalities[3] 401 injured 10,062 displaced[4] |
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 to the larger Mw 6.9 earthquake which struck the island a week later.[7]
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]
Earthquake
The earthquake struck on Sunday, at 06:47 local time, at a shallow depth of 6.4 km (4.0 mi). Residents reported severe shaking near the epicentre, with multiple structures reportedly collapsing. Dozens of houses were destroyed and widespread damage was reported. The shaking lasted 10–20 seconds.[9] Local residents have said it was the strongest quake to have ever hit Lombok. The earthquake was felt as far away as Denpasar, Bali.[10][11] In Karangasem Regency, Bali, a temple collapsed and a local court was damaged.[12]
Landslides struck the north portion of Mount Rinjani, where routes popular with hiking tourists are located.[13] Authorities confirmed that 826 hikers were trapped on the mountain and waited to be rescued.[14]
In Selong, the capital of East Lombok Regency, dozens of patients were evacuated from dr. Soedjono regional hospital while in Sembalun a Community Health Centre was significantly damaged.[15]
Authorities confirmed that 276 moderate aftershocks from 5.0 to 5.5 Mw} were recorded by the Indonesian Agency for Meteorology, Climatology and Geophysics (BMKG). The largest aftershock at a magnitude 5.7 Mw} recorded at 10:16 local time.[16] On 3 August, officials confirmed that more than 500 aftershocks had been recorded.[2]
Casualties
Authorities confirmed that a Malaysian tourist was killed by a falling wall.[17] The Indonesian National Board for Disaster Management (BNPB) confirmed that 10 people were killed and 40 people were injured.[18] The government confirmed that 18 Malaysians were affected by the earthquake.[19]
On the evening of 29 July, officials announced that the number of people who had been killed by the earthquake had risen to 16.[20] Later the number rose to 17, then 20 on 5 August.[3]
