Very strong mag. 6.6 earthquake - North Pacific Ocean, 249 km northeast of Tokyo, Japan, on Thursday, February 16, 1939 at 18:51 (GMT)

Very strong mag. 6.6 earthquake - North Pacific Ocean, 249 km northeast of Tokyo, Japan, on Thursday, February 16, 1939 at 18:51 (GMT)

Very strong magnitude 6.6 earthquake at 35 km depth

Date & time: Feb 16, 1939 18:51:07 UTC
Magnitude: 6.6
Depth: 35.0 km
Epicenter latitude / longitude: 36.865°N / 142.055°E (North Pacific Ocean, Japan)
Antipode: 36.865°S / 37.945°W
Nearest volcano: Adatara (179 km / 111 mi)
Nearby towns and cities:
106 km (66 mi) E of Iwaki (pop: 357,300) --> See nearby quakes!
129 km (80 mi) ENE of Hitachi (pop: 186,300) --> See nearby quakes!
145 km (90 mi) ENE of Hitachi-Naka (pop: 156,800) --> See nearby quakes!
146 km (91 mi) ENE of Katsuta (pop: 156,000) --> See nearby quakes!
154 km (96 mi) ENE of Mito (pop: 246,500) --> See nearby quakes!
160 km (99 mi) ESE of Kōriyama (pop: 340,600) --> See nearby quakes!
172 km (107 mi) SE of Fukushima (pop: 294,200) --> See nearby quakes!
188 km (117 mi) SE of Sendai (pop: 1,063,100) --> See nearby quakes!
196 km (122 mi) E of Utsunomiya (pop: 449,900) --> See nearby quakes!
249 km (155 mi) ENE of Tokyo (pop: 8,336,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 5 x 1014 joules (139 gigawatt hours, equivalent to 1.2 x 105 tons of TNT or 7.5 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.
6.635 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

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