Strong mag. 5.3 earthquake - Japan Sea, 87 km northwest of Noshiro, Akita, Japan, on Friday, 23 September 1983 at 11:20 (GMT)

Strong mag. 5.3 earthquake - Japan Sea, 87 km northwest of Noshiro, Akita, Japan, on Friday, 23 September 1983 at 11:20 (GMT)

Strong magnitude 5.3 earthquake at 23 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: 23 Sep 1983 11:20:01 UTC
Magnitude: 5.3
Depth: 22.9 km
Epicenter latitude / longitude: 40.748°N / 139.284°E (Japan Sea, Japan)
Nearest volcano: Oshima-Ko-jima (81 km / 50 mi)
Nearby towns and cities:
87 km (54 mi) NW of Noshiro (pop: 51,100) --> See nearby quakes!
92 km (57 mi) W of Shimokizukuri (Tsugaru) (pop: 18,900) --> See nearby quakes!
98 km (61 mi) W of Goshogawara (pop: 49,100) --> See nearby quakes!
102 km (63 mi) W of Hirosaki (pop: 175,000) --> See nearby quakes!
110 km (68 mi) W of Kuroishi (pop: 38,600) --> See nearby quakes!
120 km (75 mi) WNW of Ōdate (pop: 64,500) --> See nearby quakes!
122 km (76 mi) W of Aomori (pop: 298,400) --> See nearby quakes!
135 km (84 mi) NNW of Akita (pop: 320,100) --> See nearby quakes!
309 km (192 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: 5.6 x 1012 joules (1.56 gigawatt hours, equivalent to 1344 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
5.323 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

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Aftershocks

More info
Recorded aftershocks, latest first (1 quakes):
  • 23 Sep 1983 11:36 UTC
    | M 5.0 |
    24.9 km (15.5 mi) depth
    |
    6 km (4 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

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