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Very strong mag. 6.9 earthquake - Ostrov Shumshu, 29 km east of Severo-Kuril'sk, Sakhalin Oblast, Russia, on Friday, September 4, 1953 at 07:23 GMT

Very strong mag. 6.9 earthquake - Ostrov Shumshu, 29 km east of Severo-Kuril\'sk, Sakhalin Oblast, Russia, on Friday, September 4, 1953 at 07:23 GMT

Very strong magnitude 6.9 earthquake at 56 km depth

Date & time: Sep 4, 1953 07:23:10 UTC
Magnitude: 6.9
Depth: 56.3 km
Epicenter latitude / longitude: 50.645°N / 156.532°E (North Pacific Ocean, Russia)
Antipode: 50.645°S / 23.468°W
Nearest volcano: Ebeko (36 km / 22 mi)
Nearby towns and cities:
29 km (18 mi) E of Severo-Kuril'sk (pop: 2,420) --> See nearby quakes!
95 km (59 mi) S of Ozernovskiy (pop: 2,620) --> See nearby quakes!
284 km (176 mi) SSW of Paratunka (pop: 1,770) --> See nearby quakes!
285 km (177 mi) SSW of Vilyuchinsk (Yelizovsky District) (pop: 25,200) --> See nearby quakes!
305 km (190 mi) SSW of Petropavlovsk-Kamchatskiy (pop: 187,300) --> See nearby quakes!
310 km (193 mi) SSW of Yelizovo (pop: 40,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 1015 joules (392 gigawatt hours, equivalent to 3.4 x 105 tons of TNT or 21.1 atomic bombs!) | about seismic energy
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
6.956 kmKuril Islands (Russia)USGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
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Aftershocks

[More info]

Recorded aftershocks, latest first (7 quakes)

Date and timeMag
Depth		LocationDetails
Dec 13, 1953 06:56
68 years ago
6.0

20 km		284 km S of Petropavlovsk-Kamchatskiy, Kamchatka, RussiaMore
Nov 10, 1953 23:40
69 years ago
6.6

57 km		47 km E of Ostrov Kambal’nyy Island, Kamchatka, RussiaMore
Oct 28, 1953 12:09
69 years ago
6.0

35 km		55 km S of Ostrov Dym Island, Sakhalin Oblast, RussiaMore
Oct 11, 1953 13:08
69 years ago
6.6

50 km		49 km S of Ostrov Ptenets Island, Sakhalin Oblast, RussiaMore
Sep 26, 1953 01:02
69 years ago
6.1

46 km		45 km SE of Ostrov Kambal’nyy Island, Kamchatka, RussiaMore
Sep 23, 1953 02:14
69 years ago
6.6

55 km		38 km SE of Ostrov Ptenets Island, Sakhalin Oblast, RussiaMore
Sep 5, 1953 18:58
69 years ago
6.1

51 km		33 km SE of Ostrov Serdtse Alaida Island, Kamchatka, RussiaMore

Earlier earthquakes in the same area

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