   | |
| UTC time | 2024-09-18 02:41:06 |
|---|---|
| USGS-ANSS | ComCat |
| Local date | 18 September 2024 (2024-09-18) |
| Local time | 09:41:06WIB |
| Magnitude | 5.0Mw |
| Depth | 10 km (6 mi) (USGS) |
| Epicenter | 7°14′13″S107°34′12″E / 7.237°S 107.570°E /-7.237; 107.570 |
| Areas affected | Java,Indonesia |
| Total damage | Rp. 385 billion ($25 million)[1] |
| Max. intensity | MMI IV (Light)[2] |
| Aftershocks | 33, largest is Mw 3.5[3] |
| Casualties | 2 dead, 159 injured |
On 18 September 2024, at 09:41:06WIB (02:41:06UTC), aMw 5.0earthquake struckBandung Regency inWest Java,Indonesia, 14 km (8.7 mi) east-southeast ofBanjar.[4]
Java lies near an activeconvergent boundary that separates theSunda Plate to the north and theAustralian Plate to the south. At the boundary, marked by theSunda Trench, the northward-moving Australian Platesubducts beneath the Sunda Plate. The subduction zone is capable of generating earthquakes of up to magnitude 8.7, while the Australian Plate may also host deeper earthquakes within the downgoinglithosphere (intraslab earthquakes) beneath the coast of Java. The subduction zone produced twodestructive earthquakes and tsunamis in 2006 and1994. Anintraslab earthquake in 2009 also caused severe destruction.[5]
Compared to the highly oblique convergence across the plate boundary inSumatra, near Java, it is close to orthogonal. However, there is still a small component of left-lateral strike-slip that is accommodated within the over-riding Sunda Plate. The Cimandiri Fault is one of the structures thought to be responsible.[6] Field investigations, combined with morphometric analysis show that the Cimandiri Fault zone is a relatively broad zone of faulting and folding, with six segments identified. Older parts of the fault zone show evidence of dominant left-lateral strike-slip, while younger parts show mainly oblique slip, with a mixture of reverse faulting and left-lateral strike-slip.[7]
According to theNational Agency for Disaster Countermeasure (BNPB), the earthquake occurred in proximity to the Garsela and Lembang faults. None of these faults triggered the earthquake, instead, it ruptured along a previously unknown fault. In 2022,an earthquake in Cianjur occurred on another unmapped fault that resulted in over 600 fatalities.[8]
Two people died and 159 others were injured.[9] Both fatalities were children; one succumbed to injuries sustained after being struck by falling debris while another died from a seizure. The earthquake also displaced 710 people who were moved to shelters.[10] At least 784 homes collapsed and over 5,379 others and 226 buildings were damaged inBandung Regency.[11][12] InGarut, 20 people were injured, six homes collapsed, and 2,036 structures were damaged.[13][14][15][16] A house was destroyed and two others were damaged inWest Bandung Regency; one school was damaged inCimahi; another home collapsed inPurwakarta; and one home was damaged inBogor.[15]
