Major magnitude 7.7 earthquake - North Pacific Ocean, 46 km southeast of Kasakai-jima Island, Japan, on Monday, June 12, 1978 at 08:14 (GMT)

Major magnitude 7.7 earthquake - North Pacific Ocean, 46 km southeast of Kasakai-jima Island, Japan, on Monday, June 12, 1978 at 08:14 (GMT)

Major magnitude 7.7 earthquake at 44 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Jun 12, 1978 08:14:26 UTC
Magnitude: 7.7
Depth: 44.0 km
Epicenter latitude / longitude: 38.19°N / 142.028°E (North Pacific Ocean, Japan)
Antipode: 38.19°S / 37.972°W
Nearest volcano: Adachi (120 km / 75 mi)
Nearby towns and cities:
68 km (42 mi) ESE of Ishinomaki (pop: 117,200) --> See nearby quakes!
76 km (47 mi) ESE of Yamoto (Higashimatsushima) (pop: 32,000) --> See nearby quakes!
87 km (54 mi) ESE of Matsushima (pop: 16,400) --> See nearby quakes!
87 km (54 mi) ESE of Wakuya (Tōda Gun) (pop: 18,300) --> See nearby quakes!
88 km (55 mi) E of Shiogama (pop: 59,500) --> See nearby quakes!
93 km (58 mi) E of Rifu (pop: 35,000) --> See nearby quakes!
94 km (59 mi) ESE of Kogota (Tōda Gun) (pop: 19,800) --> See nearby quakes!
102 km (63 mi) E of Sendai (pop: 1,063,100) --> See nearby quakes!
347 km (216 mi) NE of Tokyo (pop: 8,336,600) --> See nearby quakes!
361 km (224 mi) NE of Kawasaki (pop: 1,306,800) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.2 x 1016 joules (6219 gigawatt hours, equivalent to 5.4 x 106 tons of TNT or 334.4 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
7.744 kmnear 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 yet. If you felt it be the first to report it!
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Aftershocks

More info

Recorded aftershocks, latest first (400 quakes)

  • 06 Jun 1980 10:05 UTC
    | M 4.5 |
    59 km (36.7 mi) depth
    |
    61 km (38 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    14269 km (8866 mi) distance
    | | Details
  • 26 May 1980 14:36 UTC
    | M 4.8 |
    39 km (24.2 mi) depth
    |
    131 km (82 mi) distance
    | USGS | Details
  • 21 May 1980 09:28 UTC
    | M 4.5 |
    40 km (24.9 mi) depth
    |
    208 km (129 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    14269 km (8866 mi) distance
    | | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    14269 km (8866 mi) distance
    | | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    14269 km (8866 mi) distance
    | | Details
  • 20 May 1980 01:09 UTC
    | M 4.8 |
    48 km (29.8 mi) depth
    |
    242 km (150 mi) distance
    | USGS | Details
  • 20 May 1980 00:23 UTC
    | M 4.6 |
    28 km (17.4 mi) depth
    |
    236 km (147 mi) distance
    | USGS | Details
  • 19 May 1980 18:56 UTC
    | M 5.0 |
    43 km (26.7 mi) depth
    |
    251 km (156 mi) distance
    | USGS | Details
  • 11 May 1980 16:01 UTC
    | M 4.3 |
    62 km (38.5 mi) depth
    |
    279 km (173 mi) distance
    | USGS | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    14269 km (8866 mi) distance
    | | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    14269 km (8866 mi) distance
    | | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    14269 km (8866 mi) distance
    | | Details
  • 01 Jan 1970 00:00 UTC
    | M |
    0 km (0 mi) depth
    |
    14269 km (8866 mi) distance
    | | Details
  • 06 May 1980 19:25 UTC
    | M 4.7 |
    35 km (21.7 mi) depth
    |
    147 km (92 mi) distance
    | USGS | Details
  • Show all

Earlier earthquakes in the same area

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