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Very strong mag. 6.3 earthquake - 86 km west of Noshiro, Akita, Japan, on Thursday, June 9, 1983 at 13:04 GMT

Very strong mag. 6.3 earthquake - 86 km west of Noshiro, Akita, Japan, on Thursday, June 9, 1983 at 13:04 GMT Very strong mag. 6.3 earthquake - 86 km west of Noshiro, Akita, Japan, on Thursday, June 9, 1983 at 13:04 GMT

Very strong magnitude 6.3 earthquake at 28 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.

Earthquake details

Date & timeJun 9, 1983 13:04:00 UTC
Local time at epicenter
StatusConfirmed
Magnitude6.3
Depth28.0 km
Epicenter latitude / longitude40.268°N / 139.023°E (Japan Sea, Japan)
Antipode40.268°S / 40.977°W
Shaking intensityStrong shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoMegata (70 km / 43 mi)
Nearby towns and cities86 km (53 mi) W of Noshiro (pop: 51,100) | Show on map | Quakes nearby
90 km (56 mi) WNW of Tennō (Katagami) (pop: 22,700) | Show on map | Quakes nearby
112 km (69 mi) WNW of Akita (pop: 320,100) | Show on map | Quakes nearby
128 km (79 mi) WSW of Hirosaki (pop: 175,000) | Show on map | Quakes nearby
130 km (81 mi) W of Ōdate (pop: 64,500) | Show on map | Quakes nearby
157 km (98 mi) WSW of Aomori (pop: 298,400) | Show on map | Quakes nearby
166 km (103 mi) NNW of Sakata (pop: 100,400) | Show on map | Quakes nearby
192 km (119 mi) WNW of Morioka (pop: 295,200) | Show on map | Quakes nearby
366 km (228 mi) SSW of Sapporo (pop: 1,883,000) | Show on map | Quakes nearby
513 km (319 mi) N of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby
Estimated seismic energy released1.8 x 1014 joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 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.
Mag.DepthLocationSource
6.328 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.
There are no user reports for this quake.
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Aftershocks

[More info]

Recorded aftershocks, latest first (30 quakes)

Date and timeMag
Depth
LocationDetails
Sep 23, 1983 11:36
39 years ago
5.0

25 km
91 km NW of Noshiro, Akita, JapanMore
Sep 23, 1983 11:20
39 years ago
5.3

23 km
87 km NW of Noshiro, Akita, JapanMore
Sep 18, 1983 13:12
39 years ago
4.8

41 km
43 km SW of Noshiro, Akita, JapanMore
Jul 25, 1983 23:17
39 years ago
5.0

33 km
92 km W of Noshiro, Akita, JapanMore
Jul 25, 1983 06:30
39 years ago
4.5

22 km
116 km W of Noshiro, Akita, JapanMore
Jul 24, 1983 19:07
39 years ago
4.3

33 km
125 km W of Hirosaki, Aomori, JapanMore
Jul 24, 1983 15:36
39 years ago
4.3

33 km
90 km W of Noshiro, Akita, JapanMore
Jul 24, 1983 14:52
39 years ago
5.1

194 km
48 km W of Akita, JapanMore
Jul 22, 1983 12:16
39 years ago
4.8

33 km
83 km W of Noshiro, Akita, JapanMore
Jul 20, 1983 21:11
39 years ago
4.7

33 km
92 km W of Noshiro, Akita, JapanMore
Jul 17, 1983 17:28
39 years ago
4.8

56 km
92 km NW of Noshiro, Akita, JapanMore
Jul 2, 1983 05:32
39 years ago
5.1

17 km
99 km W of Noshiro, Akita, JapanMore
Jul 1, 1983 23:32
39 years ago
4.7

33 km
106 km W of Noshiro, Akita, JapanMore
Jun 29, 1983 05:11
39 years ago
5.0

22 km
96 km W of Noshiro, Akita, JapanMore
Jun 24, 1983 02:09
39 years ago
4.3

33 km
93 km NW of Noshiro, Akita, JapanMore
Jun 22, 1983 20:15
39 years ago
5.4

17 km
94 km W of Noshiro, Akita, JapanMore
Jun 22, 1983 00:59
39 years ago
4.5

33 km
90 km NW of Noshiro, Akita, JapanMore
Jun 20, 1983 02:43
39 years ago
5.4

18 km
123 km W of Hirosaki, Aomori, JapanMore
Jun 19, 1983 04:35
39 years ago
4.8

31 km
92 km W of Noshiro, Akita, JapanMore
Jun 18, 1983 22:13
39 years ago
5.5

21 km
92 km W of Noshiro, Akita, JapanMore
Jun 15, 1983 07:28
39 years ago
4.4

33 km
82 km W of Noshiro, Akita, JapanMore
Jun 15, 1983 01:34
39 years ago
4.6

33 km
92 km W of Noshiro, Akita, JapanMore
Jun 12, 1983 17:43
39 years ago
4.6

33 km
108 km W of Noshiro, Akita, JapanMore
Jun 12, 1983 05:02
39 years ago
4.4

33 km
89 km W of Noshiro, Akita, JapanMore
Jun 12, 1983 03:00
39 years ago
4.7

33 km
87 km W of Noshiro, Akita, JapanMore
Jun 11, 1983 22:01
39 years ago
5.1

23 km
113 km W of Hirosaki, Aomori, JapanMore
Jun 11, 1983 06:14
39 years ago
4.6

33 km
91 km W of Noshiro, Akita, JapanMore
Jun 10, 1983 07:20
39 years ago
5.0

27 km
78 km W of Noshiro, Akita, JapanMore
Jun 9, 1983 14:41
39 years ago
4.8

28 km
86 km W of Noshiro, Akita, JapanMore
Jun 9, 1983 14:31
39 years ago
4.3

33 km
83 km W of Noshiro, Akita, JapanMore

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