Very strong mag. 6.4 earthquake - 185 km east of Hachinohe, Aomori, Japan, on Friday, April 8, 1994 at 01:10 GMT

Very strong mag. 6.4 earthquake - 185 km east of Hachinohe, Aomori, Japan, on Friday, April 8, 1994 at 01:10 GMT Very strong mag. 6.4 earthquake - 185 km east of Hachinohe, Aomori, Japan, on Friday, April 8, 1994 at 01:10 GMT

Very strong magnitude 6.4 earthquake at 13 km depth

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

Earthquake details

Date & timeApr 8, 1994 01:10:40 UTC
Local time at epicenter
StatusConfirmed
Magnitude6.4
Depth13.3 km
Epicenter latitude / longitude40.608°N / 143.683°E (North Pacific Ocean, Japan)
Antipode40.608°S / 36.317°W
Shaking intensityVery strong shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoOsore-yama (220 km / 137 mi)
Nearby towns and cities183 km (114 mi) NE of Miyako (pop: 51,700) | Show on map | Quakes nearby
185 km (115 mi) E of Hachinohe (pop: 239,000) | Show on map | Quakes nearby
194 km (120 mi) E of Misawa (pop: 42,800) | Show on map | Quakes nearby
195 km (121 mi) NE of Yamada (Shimohei-gun) (pop: 20,100) | Show on map | Quakes nearby
238 km (148 mi) ENE of Morioka (pop: 295,200) | Show on map | Quakes nearby
250 km (155 mi) E of Aomori (pop: 298,400) | Show on map | Quakes nearby
260 km (161 mi) S of Obihiro (pop: 173,900) | Show on map | Quakes nearby
269 km (167 mi) SSW of Kushiro (pop: 183,600) | Show on map | Quakes nearby
335 km (208 mi) SE of Sapporo (pop: 1,883,000) | Show on map | Quakes nearby
649 km (403 mi) NNE of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby
Estimated seismic energy released2.5 x 1014 joules (69.8 gigawatt hours, equivalent to 60036 tons of TNT or 3.8 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
6.413 kmoff the east 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 (20 quakes)

Date and timeMag
Depth
LocationDetails
Sep 6, 1994 10:07
28 years ago
4.7

33 km
264 km E of Hachinohe, Aomori, JapanMore
Sep 6, 1994 09:37
28 years ago
4.6

33 km
268 km E of Hachinohe, Aomori, JapanMore
Aug 28, 1994 10:10
28 years ago
4.6

56 km
97 km E of Hachinohe, Aomori, JapanMore
Aug 3, 1994 07:43
28 years ago
3.7

65 km
121 km E of Hachinohe, Aomori, JapanMore
Jul 21, 1994 21:32
28 years ago
4.7

33 km
195 km E of Hachinohe, Aomori, JapanMore
Jul 11, 1994 22:32
28 years ago
4.6

48 km
136 km NE of Hachinohe, Aomori, JapanMore
May 11, 1994 04:52
28 years ago
3.9

33 km
90 km NE of Miyako, Iwate, JapanMore
Apr 16, 1994 12:39
28 years ago
4.7

27 km
193 km E of Hachinohe, Aomori, JapanMore
Apr 11, 1994 13:48
28 years ago
4.3

33 km
105 km NE of Hachinohe, Aomori, JapanMore
Apr 11, 1994 10:25
28 years ago
4.7

32 km
172 km E of Hachinohe, Aomori, JapanMore
Apr 9, 1994 23:11
28 years ago
4.9

20 km
201 km E of Hachinohe, Aomori, JapanMore
Apr 9, 1994 02:16
28 years ago
4.7

16 km
192 km E of Hachinohe, Aomori, JapanMore
Apr 8, 1994 21:09
28 years ago
4.5

48 km
179 km E of Hachinohe, Aomori, JapanMore
Apr 8, 1994 14:42
28 years ago
4.3

37 km
197 km E of Hachinohe, Aomori, JapanMore
Apr 8, 1994 14:19
28 years ago
5.0

35 km
174 km E of Hachinohe, Aomori, JapanMore
Apr 8, 1994 14:13
28 years ago
4.9

36 km
189 km E of Hachinohe, Aomori, JapanMore
Apr 8, 1994 13:35
28 years ago
4.3

33 km
194 km E of Hachinohe, Aomori, JapanMore
Apr 8, 1994 06:45
28 years ago
4.0

24 km
187 km E of Hachinohe, Aomori, JapanMore
Apr 8, 1994 04:37
28 years ago
4.3

26 km
205 km E of Hachinohe, Aomori, JapanMore
Apr 8, 1994 01:41
28 years ago
4.1

24 km
178 km E of Hachinohe, Aomori, JapanMore

Earlier earthquakes in the same area

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