Strong mag. 5.5 earthquake - Japan Sea, 92 km west of Noshiro, Akita, Japan, on Saturday, 18 June 1983 at 22:13 (GMT)

Strong mag. 5.5 earthquake - Japan Sea, 92 km west of Noshiro, Akita, Japan, on Saturday, 18 June 1983 at 22:13 (GMT)

Strong magnitude 5.5 earthquake at 21 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: 18 Jun 1983 22:13:31 UTC
Magnitude: 5.5
Depth: 21.3 km
Epicenter latitude / longitude: 40.176°N / 138.944°E (Japan Sea, Japan)
Nearest volcano: Megata (71 km / 44 mi)
Nearby towns and cities:
92 km (57 mi) W of Noshiro (pop: 51,100) --> See nearby quakes!
92 km (57 mi) WNW of Tennō (Katagami) (pop: 22,700) --> See nearby quakes!
112 km (70 mi) WNW of Akita (pop: 320,100) --> See nearby quakes!
121 km (75 mi) W of Takanosu (Kitaakita) (pop: 20,500) --> See nearby quakes!
137 km (85 mi) W of Ōdate (pop: 64,500) --> See nearby quakes!
138 km (85 mi) WSW of Hirosaki (pop: 175,000) --> See nearby quakes!
145 km (90 mi) WSW of Goshogawara (pop: 49,100) --> See nearby quakes!
148 km (92 mi) WSW of Kuroishi (pop: 38,600) --> See nearby quakes!
379 km (235 mi) SSW of Sapporo (pop: 1,883,000) --> See nearby quakes!
503 km (313 mi) N of Tokyo (pop: 8,336,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.1 x 1013 joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 atomic bombs!) 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
5.521 kmeastern Sea of 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.
There are no user reports for this quake yet. If you felt it be the first to report it!
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Aftershocks

More info
Recorded aftershocks, latest first (9 quakes):
  • 25 Jul 1983 23:17 UTC
    | M 5.0 |
    33 km (20.5 mi) depth
    |
    3 km (2 mi) distance
    | USGS | Details
  • 24 Jul 1983 15:36 UTC
    | M 4.3 |
    33 km (20.5 mi) depth
    |
    15 km (9 mi) distance
    | USGS | Details
  • 22 Jul 1983 12:16 UTC
    | M 4.8 |
    33 km (20.5 mi) depth
    |
    9 km (6 mi) distance
    | USGS | Details
  • 20 Jul 1983 21:11 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    11 km (7 mi) distance
    | USGS | Details
  • 02 Jul 1983 05:32 UTC
    | M 5.1 |
    17.3 km (10.7 mi) depth
    |
    15 km (9 mi) distance
    | USGS | Details
  • 01 Jul 1983 23:32 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    19 km (12 mi) distance
    | USGS | Details
  • 29 Jun 1983 05:11 UTC
    | M 5.0 |
    21.6 km (13.4 mi) depth
    |
    14 km (9 mi) distance
    | USGS | Details
  • 22 Jun 1983 20:15 UTC
    | M 5.4 |
    17.2 km (10.7 mi) depth
    |
    9 km (6 mi) distance
    | USGS | Details
  • 19 Jun 1983 04:35 UTC
    | M 4.8 |
    30.9 km (19.2 mi) depth
    |
    16 km (10 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

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