Major magnitude 7.2 earthquake - Bangladesh on Monday, July 8, 1918 at 10:22 GMT

Date & time: Jul 8, 1918 10:22:08 UTC
Magnitude: 7.2
Depth: 15.0 km
Epicenter latitude / longitude: 24.599°N / 90.853°E (Bangladesh)
Antipode: 24.599°S / 89.147°W
Nearby towns and cities:
19 km (12 mi) NNE of Kishorganj (pop: 90,700) --> See nearby quakes!
34 km (21 mi) SSE of Netrakona (pop: 79,000) --> See nearby quakes!
44 km (27 mi) NNW of Bājitpur (pop: 34,600) --> See nearby quakes!
52 km (32 mi) W of Baniachang (pop: 37,800) --> See nearby quakes!
62 km (38 mi) WNW of Habiganj (pop: 88,800) --> See nearby quakes!
62 km (39 mi) NNW of Bhairab Bāzār (pop: 105,500) --> See nearby quakes!
76 km (47 mi) N of Narsingdi (pop: 281,100) --> See nearby quakes!
91 km (57 mi) NNE of Tongi (pop: 337,600) --> See nearby quakes!
109 km (68 mi) NNE of Dhaka (pop: 10,356,500) --> See nearby quakes!
238 km (148 mi) NNE of Khulna (pop: 1,342,300) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 4 x 10¹⁵ joules (1106 gigawatt hours, equivalent to 9.5 x 10⁵ tons of TNT or 59.5 atomic bombs!) | 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. 1585 km² (=612 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 69 km (43 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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