Moderate mag. 5.0 earthquake - Japan Sea, 91 km northwest of Noshiro, Akita, Japan, on Friday, 23 September 1983 at 11:36 (GMT)

Moderate mag. 5.0 earthquake - Japan Sea, 91 km northwest of Noshiro, Akita, Japan, on Friday, 23 September 1983 at 11:36 (GMT)

Moderate magnitude 5.0 earthquake at 25 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: 23 Sep 1983 11:36:59 UTC
Magnitude: 5
Depth: 24.9 km
Epicenter latitude / longitude: 40.742°N / 139.213°E (Japan Sea, Japan)
Nearest volcano: Oshima-Ko-jima (85 km / 53 mi)
Nearby towns and cities:
91 km (57 mi) NW of Noshiro (pop: 51,100) --> See nearby quakes!
98 km (61 mi) W of Shimokizukuri (Tsugaru) (pop: 18,900) --> See nearby quakes!
104 km (64 mi) W of Goshogawara (pop: 49,100) --> See nearby quakes!
108 km (67 mi) W of Hirosaki (pop: 175,000) --> See nearby quakes!
125 km (78 mi) WNW of Ōdate (pop: 64,500) --> See nearby quakes!
128 km (80 mi) W of Aomori (pop: 298,400) --> See nearby quakes!
137 km (85 mi) NW of Akita (pop: 320,100) --> See nearby quakes!
201 km (125 mi) NW of Morioka (pop: 295,200) --> See nearby quakes!
313 km (195 mi) SW of Sapporo (pop: 1,883,000) --> See nearby quakes!
564 km (350 mi) N of Tokyo (pop: 8,336,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2 x 1012 joules (554 megawatt hours, equivalent to 477 tons of TNT) More info
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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
5.025 kmnear the west coast of Honshu, JapanUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

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Aftershocks

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Recorded aftershocks, latest first (0 quakes):
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