Very strong mag. 6.3 earthquake - 138 km south of Kushiro, Hokkaido, Japan, on Wednesday, July 6, 1988 at 15:54 GMT

Very strong mag. 6.3 earthquake - 138 km south of Kushiro, Hokkaido, Japan, on Wednesday, July 6, 1988 at 15:54 GMT Very strong mag. 6.3 earthquake - 138 km south of Kushiro, Hokkaido, Japan, on Wednesday, July 6, 1988 at 15:54 GMT

Very strong magnitude 6.3 earthquake at 30 km depth

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

Earthquake details

Date & timeJul 6, 1988 15:54:19 UTC
Local time at epicenter
StatusConfirmed
Magnitude6.3
Depth30.1 km
Epicenter latitude / longitude41.744°N / 144.199°E (North Pacific Ocean, Japan)
Antipode41.744°S / 35.801°W
Shaking intensityStrong shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoAkan (183 km / 114 mi)
Nearby towns and cities138 km (86 mi) S of Kushiro (pop: 183,600) | Show on map | Quakes nearby
154 km (96 mi) SSE of Obihiro (pop: 173,900) | Show on map | Quakes nearby
161 km (100 mi) SSE of Otofuke (pop: 40,900) | Show on map | Quakes nearby
165 km (102 mi) ESE of Shizunai-furukawachō (pop: 22,400) | Show on map | Quakes nearby
230 km (143 mi) S of Kitami (pop: 113,100) | Show on map | Quakes nearby
236 km (147 mi) ESE of Tomakomai (pop: 174,800) | Show on map | Quakes nearby
241 km (150 mi) ESE of Chitose (pop: 92,900) | Show on map | Quakes nearby
265 km (165 mi) ENE of Hachinohe (pop: 239,000) | Show on map | Quakes nearby
276 km (172 mi) ESE of Sapporo (pop: 1,883,000) | Show on map | Quakes nearby
778 km (484 mi) NNE 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
6.330 kmHokkaido, Japan regionUSGS
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 (6 quakes)

Date and timeMag
Depth
LocationDetails
Dec 24, 1988 15:35
34 years ago
4.4

35 km
83 km S of Kushiro, Hokkaido, JapanMore
Sep 20, 1988 22:43
34 years ago
5.3

42 km
84 km SE of Kushiro, Hokkaido, JapanMore
Jul 7, 1988 09:40
34 years ago
4.7

33 km
171 km S of Kushiro, Hokkaido, JapanMore
Jul 6, 1988 16:55
34 years ago
5.5

34 km
140 km S of Kushiro, Hokkaido, JapanMore
Jul 6, 1988 16:43
34 years ago
4.8

46 km
139 km S of Kushiro, Hokkaido, JapanMore
Jul 6, 1988 16:31
34 years ago
5.3

40 km
142 km S of Kushiro, Hokkaido, JapanMore

Earlier earthquakes in the same area

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