Strong mag. 6.5 earthquake - North Pacific Ocean, 35 km southeast of Ostrov Ptenets Island, Sakhalin Oblast, Russia, on Sunday, August 18, 1957 at 21:42 (GMT)

Strong mag. 6.5 earthquake - North Pacific Ocean, 35 km southeast of Ostrov Ptenets Island, Sakhalin Oblast, Russia, on Sunday, August 18, 1957 at 21:42 (GMT)

Strong magnitude 6.5 earthquake at 57 km depth

Date & time: Aug 18, 1957 21:42:38 UTC
Magnitude: 6.5
Depth: 57.4 km
Epicenter latitude / longitude: 50.057°N / 156.229°E (North Pacific Ocean, Russia)
Antipode: 50.057°S / 23.771°W
Nearest volcano: Vernadskii Ridge (58 km / 36 mi)
Nearby towns and cities:
69 km (43 mi) S of Severo-Kuril'sk (pop: 2,420) --> See nearby quakes!
161 km (100 mi) S of Ozernovskiy (pop: 2,620) --> See nearby quakes!
352 km (219 mi) SSW of Paratunka (pop: 1,770) --> See nearby quakes!
353 km (220 mi) SSW of Vilyuchinsk (Yelizovsky District) (pop: 25,200) --> See nearby quakes!
373 km (232 mi) SSW of Petropavlovsk-Kamchatskiy (pop: 187,300) --> See nearby quakes!
379 km (235 mi) SSW of Yelizovo (pop: 40,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.5 x 1014 joules (98.6 gigawatt hours, equivalent to 84802 tons of TNT or 5.3 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.
6.557 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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Recorded aftershocks, latest first (2 quakes)

Date and timeMag
Oct 25, 1957 10:03
64 years ago

50 km
North Pacific Ocean, 26 km E of Ostrov Chaykina Island, Sakhalin Oblast, RussiaMore
Sep 7, 1957 06:48
64 years ago

50 km
North Pacific Ocean, 49 km SE of Ostrov Ptenets Island, Sakhalin Oblast, RussiaMore

Earlier earthquakes in the same area

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