Major magnitude 6.8 earthquake - North Pacific Ocean, 290 km east of Tokyo, Japan, on Wednesday, November 9, 1938 at 09:15 (GMT)

Major magnitude 6.8 earthquake - North Pacific Ocean, 290 km east of Tokyo, Japan, on Wednesday, November 9, 1938 at 09:15 (GMT)

Major magnitude 6.8 earthquake at 15 km depth

Date & time: Nov 9, 1938 09:15:53 UTC
Magnitude: 6.8
Depth: 15.0 km
Epicenter latitude / longitude: 36.474°N / 142.769°E (North Pacific Ocean, Japan)
Antipode: 36.474°S / 37.231°W
Nearby towns and cities:
180 km (112 mi) ESE of Iwaki (pop: 357,300) --> See nearby quakes!
184 km (114 mi) E of Kitaibaraki (pop: 50,800) --> See nearby quakes!
185 km (115 mi) E of Takahagi (pop: 33,600) --> See nearby quakes!
190 km (118 mi) E of Hitachi (pop: 186,300) --> See nearby quakes!
192 km (120 mi) ENE of Hasaki (pop: 39,200) --> See nearby quakes!
197 km (122 mi) E of Funaishikawa (Naka-gun) (pop: 35,300) --> See nearby quakes!
199 km (124 mi) ENE of Kashima-shi (pop: 65,800) --> See nearby quakes!
208 km (129 mi) E of Mito (pop: 246,500) --> See nearby quakes!
290 km (180 mi) ENE of Tokyo (pop: 8,336,600) --> See nearby quakes!
304 km (189 mi) ENE of Yokohama (pop: 3,574,400) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1 x 1015 joules (278 gigawatt hours, equivalent to 2.4 x 105 tons of TNT or 14.9 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
6.815 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 (4 quakes)

Date and timeMag
Depth
LocationDetails
Feb 16, 1939 18:51
83 years ago
6.6

35 km
North Pacific Ocean, 249 km NE of Tokyo, JapanMore
Nov 30, 1938 02:29
83 years ago
6.8

30 km
North Pacific Ocean, 263 km NE of Tokyo, JapanMore
Nov 22, 1938 01:14
83 years ago
6.8

25 km
North Pacific Ocean, 275 km NE of Tokyo, JapanMore
Nov 13, 1938 22:31
83 years ago
6.9

35 km
North Pacific Ocean, 307 km E of Tokyo, JapanMore

Earlier earthquakes in the same area

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