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Date & time: Sunday, 19 April 1936 05:07 UTC
Magnitude: 7.4
Depth: 20.0 km
Epicenter latitude / longitude: 7.613°S / 156.557°E (Solomon Islands)
Nearest volcano: Nonda (8 km / 5 mi)
Nearby towns and cities:
63 km (39 mi) NW of Gizo (pop: 6,200)
102 km (63 mi) S of Taro (pop: 0)
189 km (117 mi) SE of Arawa (pop: 40,300)
Primary data source: USGS
Estimated released energy: 7.9 x 10¹⁵ joules (2206 gigawatt hours, equivalent to 1.9 x 10⁶ tons of TNT or 118.7 atomic bombs!) [learn more]

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Based on its magnitude, the fault that was active during the quake ruptured along a surface of approx. 2512 km² (=970 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 87 km (54 mi).
Aftershocks typically occur during the weeks, months or even a year 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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