Very strong mag. 6.3 earthquake - 3.4 km southeast of Imaichi, Nikko-shi, Prefectura de Tochigi, Japan, on Sunday, December 25, 1949 at 23:17 (GMT)

Very strong mag. 6.3 earthquake - 3.4 km southeast of Imaichi, Nikko-shi, Prefectura de Tochigi, Japan, on Sunday, December 25, 1949 at 23:17 (GMT)

Very strong magnitude 6.3 earthquake at 10 km depth

Date & time: Dec 25, 1949 23:17:33 UTC
Magnitude: 6.3
Depth: 10.0 km
Epicenter latitude / longitude: 36.702°N / 139.717°E (Nikko-shi, Prefectura de Tochigi, Japan)
Antipode: 36.702°S / 40.283°W
Nearest volcano: Nyoho-Akanagi (20 km / 12 mi)
Nearby towns and cities:
3 km (2 mi) ESE of Imaichi (pop: 64,300) --> See nearby quakes!
10 km (6 mi) ESE of Nikkō (Nikko) (pop: 16,000) --> See nearby quakes!
17 km (11 mi) N of Kanuma (pop: 94,900) --> See nearby quakes!
21 km (13 mi) NW of Utsunomiya (Prefectura de Tochigi) (pop: 449,900) --> See nearby quakes!
22 km (14 mi) WSW of Yaita (pop: 36,300) --> See nearby quakes!
34 km (21 mi) WSW of Ōtawara (pop: 58,900) --> See nearby quakes!
35 km (22 mi) N of Tochigi (pop: 82,100) --> See nearby quakes!
45 km (28 mi) N of Oyama (pop: 159,900) --> See nearby quakes!
113 km (70 mi) N of Tokyo (pop: 8,336,600) --> See nearby quakes!
141 km (88 mi) N of Yokohama (Kanagawa) (pop: 3,574,400) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.8 x 1014 joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 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.
6.310 kmeastern 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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