Very strong mag. 6.6 earthquake - 38 km southeast of Ostrov Ptenets Island, Sakhalin Oblast, Russia, on Wednesday, September 23, 1953 at 02:14 GMT
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Very strong magnitude 6.6 earthquake at 55 km depth
Magnitude: 6.6
Depth: 55.2 km
Epicenter latitude / longitude: 50.08°N / 156.302°E

Antipode: 50.08°S / 23.698°W
Nearest volcano: Vernadskii Ridge (57 km / 35 mi)
Nearby towns and cities:
67 km (42 mi) S of Severo-Kuril'sk (pop: 2,420) --> See nearby quakes!
158 km (98 mi) S of Ozernovskiy (pop: 2,620) --> See nearby quakes!
348 km (216 mi) SSW of Paratunka (pop: 1,770) --> See nearby quakes!
349 km (217 mi) SSW of Vilyuchinsk (Yelizovsky District) (pop: 25,200) --> See nearby quakes!
369 km (229 mi) SSW of Petropavlovsk-Kamchatskiy (pop: 187,300) --> See nearby quakes!
374 km (233 mi) SSW of Yelizovo (pop: 40,700) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 5 x 1014 joules (139 gigawatt hours, equivalent to 1.2 x 105 tons of TNT or 7.5 atomic bombs!) | about seismic energy
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. | Depth | Location | Source |
6.6 | 55 km | Kuril Islands (Russia) | USGS |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Aftershocks
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Recorded aftershocks, latest first (4 quakes)
Date and time![]() | Mag Depth | Location | Details |
Mar 9, 1954 05:39 68 years ago | 6.3 28 km | 351 km S of Petropavlovsk-Kamchatskiy, Kamchatka, Russia | More |
Oct 28, 1953 12:09 69 years ago | 6.0 35 km | 55 km S of Ostrov Dym Island, Sakhalin Oblast, Russia | More |
Oct 11, 1953 13:08 69 years ago | 6.6 50 km | 49 km S of Ostrov Ptenets Island, Sakhalin Oblast, Russia | More |
Sep 26, 1953 01:02 69 years ago | 6.1 46 km | 45 km SE of Ostrov Kambal’nyy Island, Kamchatka, Russia | More |
Earlier earthquakes in the same area
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