Moderate mag. 5.0 earthquake - 28 km west of Purwakarta, West Java, Indonesia, on Saturday, February 26, 2011 at 06:29 GMT

Date & time: Feb 26, 2011 06:29:35 UTC
Magnitude: 5
Depth: 187.4 km
Epicenter latitude / longitude: 6.556°S / 107.187°E (Indonesia)
Antipode: 6.556°N / 72.813°W
Nearest volcano: Sanggabuana (5 km / 3 mi)
Nearby towns and cities:
28 km (18 mi) W of Purwakarta (pop: 215,800) --> See nearby quakes!
30 km (19 mi) NNW of Ciranjang-hilir (pop: 77,800) --> See nearby quakes!
31 km (19 mi) SE of Cileungsir (pop: 202,200) --> See nearby quakes!
33 km (21 mi) S of Cikarang (pop: 106,500) --> See nearby quakes!
33 km (21 mi) WSW of Cikampek (pop: 145,600) --> See nearby quakes!
35 km (22 mi) ESE of Citeureup (pop: 110,200) --> See nearby quakes!
38 km (23 mi) ESE of Cibinong (pop: 188,700) --> See nearby quakes!
42 km (26 mi) SSE of Bekasi (pop: 1,520,100) --> See nearby quakes!
54 km (33 mi) SE of Jakarta (pop: 8,540,100) --> See nearby quakes!
62 km (38 mi) NW of Bandung (pop: 1,699,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2 x 10¹² joules (554 megawatt hours, equivalent to 477 tons of TNT) | about seismic energy

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Based on its magnitude, the fault that was active during the quake ruptured along a surface of approx. 10 km² (=4 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 5 km (3 mi).
Aftershocks typically occur during the days and weeks following the quake at or near the same fault, at distances of up to approx. two times the length of the rupture zone.
The often broadly linear arrangement of aftershock epicenters encompasses the rupture zone of the main shock (check on the map below to verify).

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