Strong mag. 6.0 earthquake - Off the East Coast of Honshu, Japan, on Friday, 23 December 1977 at 21:14 (GMT)
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Strong magnitude 6.0 earthquake at 41 km depth
Magnitude: 6
Depth: 41.0 km
Epicenter latitude / longitude: 39.068°N / 143.047°E

Nearest volcano: Yakeishi (191 km / 119 mi)
Nearby towns and cities:
104 km (65 mi) ESE of Ōtsuchi (Kamihei-gun) (pop: 16,500) --> See nearby quakes!
104 km (65 mi) ESE of Kamaishi (pop: 43,100) --> See nearby quakes!
104 km (65 mi) ESE of Yamada (Shimohei-gun) (pop: 20,100) --> See nearby quakes!
115 km (71 mi) E of Ōfunato (pop: 35,400) --> See nearby quakes!
115 km (71 mi) ESE of Miyako (pop: 51,700) --> See nearby quakes!
133 km (83 mi) E of Tōno (pop: 26,800) --> See nearby quakes!
168 km (104 mi) ENE of Ishinomaki (pop: 117,200) --> See nearby quakes!
168 km (104 mi) E of Kitakami (pop: 93,900) --> See nearby quakes!
209 km (130 mi) ENE of Sendai (pop: 1,063,100) --> See nearby quakes!
479 km (297 mi) NE of Tokyo (pop: 8,336,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 6.3 x 1013 joules (17.5 gigawatt hours, equivalent to 15080 tons of TNT or 0.9 atomic bombs!) More info
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.
Magnitude | Depth | Location | Source |
M 6.0 | 41 km | off the east coast of Honshu, Japan | 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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There are no user reports for this quake yet. If you felt it Aftershocks of the 6.0 quake Off the East Coast of Honshu, Japan, 23 December 1977 21:14 GMT
More info
Recorded aftershocks, latest first (21 quakes):- 17 Jun 1978 13:02 UTC| M 4.2 |33 km (20.5 mi) depth|54 km (34 mi) distance| USGS | Details
- 01 Jan 1970 00:00 UTC| M |0 km (0 mi) depth|14276 km (8871 mi) distance| | Details
- 13 Jun 1978 17:09 UTC| M 4.7 |29 km (18 mi) depth|58 km (36 mi) distance| USGS | Details
- 30 May 1978 12:39 UTC| M 4.5 |33 km (20.5 mi) depth|21 km (13 mi) distance| USGS | Details
- 01 Jan 1970 00:00 UTC| M |0 km (0 mi) depth|14276 km (8871 mi) distance| | Details
- 01 Jan 1970 00:00 UTC| M |0 km (0 mi) depth|14276 km (8871 mi) distance| | Details
- 20 May 1978 04:28 UTC| M 4.4 |53 km (32.9 mi) depth|56 km (35 mi) distance| USGS | Details
- 09 Apr 1978 15:34 UTC| M 4.6 |31 km (19.3 mi) depth|39 km (24 mi) distance| USGS | Details
- 01 Jan 1970 00:00 UTC| M |0 km (0 mi) depth|14276 km (8871 mi) distance| | Details
- 01 Jan 1970 00:00 UTC| M |0 km (0 mi) depth|14276 km (8871 mi) distance| | Details
- 10 Mar 1978 22:20 UTC| M 4.9 |30 km (18.6 mi) depth|51 km (32 mi) distance| USGS | Details
- 23 Jan 1978 11:09 UTC| M 4.3 |33 km (20.5 mi) depth|57 km (36 mi) distance| USGS | Details
- 01 Jan 1970 00:00 UTC| M |0 km (0 mi) depth|14276 km (8871 mi) distance| | Details
- 19 Jan 1978 01:45 UTC| M 4.9 |16 km (9.9 mi) depth|23 km (14 mi) distance| USGS | Details
- 16 Jan 1978 05:32 UTC| M 5.1 |9 km (5.6 mi) depth|16 km (10 mi) distance| USGS | Details
- 11 Jan 1978 13:29 UTC| M 4.9 |33 km (20.5 mi) depth|14 km (9 mi) distance| USGS | Details
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Earlier earthquakes in the same area since 1900
Strong mag. 6.0 earthquake - Off the East Coast of Honshu, Japan, on Friday, 23 December 1977 at 21:14 (GMT)- Date / time UTC| Mag |Depth|Age|Distance| Details
- 02 Mar 1933 17:31| 8.4 |15km / 9.3mi|88 years ago|134km / 83mi| 1933 Sanriku (Sanriku-oki) Earthquake, Japan
- 16 May 1968 00:49| 8.2 |30km / 19mi|53 years ago|202km / 126mi| Off the East Coast of Honshu, Japan
- 20 Mar 1960 17:07| 8.0 |15km / 9.3mi|61 years ago|90km / 56mi| Off the East Coast of Honshu, Japan
- 05 Nov 1938 08:43| 7.8 |35km / 22mi|82 years ago|248km / 154mi| Off the East Coast of Honshu, Japan
- 09 Mar 1931 03:49| 7.8 |35km / 22mi|90 years ago|176km / 110mi| Near the East Coast of Honshu, Japan
- 06 Nov 1938 08:53| 7.7 |30km / 19mi|82 years ago|197km / 123mi| Off the East Coast of Honshu, Japan
- 05 Nov 1938 10:50| 7.7 |35km / 22mi|82 years ago|224km / 139mi| Off the East Coast of Honshu, Japan
- 06 Nov 1938 21:38| 7.6 |25km / 16mi|82 years ago|234km / 146mi| Off the East Coast of Honshu, Japan
- 09 Aug 1901 18:33| 7.5 |unknown|120 years ago|132km / 82mi| Off the East Coast of Honshu, Japan
- 12 Apr 1962 00:52| 7.3 |28km / 17mi|59 years ago|118km / 74mi| Near the East Coast of Honshu, Japan
Hint: Click on Date/Time to show latest first
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