Major magnitude 7.8 earthquake - Inoko-jima, 6 km northeast of Tateyama, Chiba, Japan, on Sunday, September 2, 1923 at 02:46 (GMT)

Major magnitude 7.8 earthquake - Inoko-jima, 6 km northeast of Tateyama, Chiba, Japan, on Sunday, September 2, 1923 at 02:46 (GMT)

Major magnitude 7.8 earthquake at 15 km depth

Date & time: Sep 2, 1923 02:46:41 UTC
Magnitude: 7.8
Depth: 15.0 km
Epicenter latitude / longitude: 35.007°N / 139.926°E (Tateyama-shi, Chiba, Japan)
Antipode: 35.007°S / 40.074°W
Nearest volcano: Oshima (58 km / 36 mi)
Nearby towns and cities:
6 km (4 mi) ENE of Tateyama (pop: 50,100) --> See nearby quakes!
19 km (12 mi) WSW of Kamogawa (pop: 29,100) --> See nearby quakes!
35 km (22 mi) SSE of Futtsu (pop: 51,700) --> See nearby quakes!
39 km (24 mi) S of Kimitsu (pop: 92,100) --> See nearby quakes!
39 km (24 mi) SE of Yokosuka (Kanagawa) (pop: 429,000) --> See nearby quakes!
42 km (26 mi) S of Kisarazu (pop: 122,500) --> See nearby quakes!
48 km (30 mi) SE of Kamakura (Kanagawa) (pop: 166,000) --> See nearby quakes!
54 km (33 mi) SSE of Yokohama (Kanagawa) (pop: 3,574,400) --> See nearby quakes!
68 km (42 mi) SSW of Chiba (pop: 919,700) --> See nearby quakes!
79 km (49 mi) SSE of Tokyo (pop: 8,336,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.2 x 1016 joules (8784 gigawatt hours, equivalent to 7.6 x 106 tons of TNT or 472.4 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
7.815 kmnear the south 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 (7 quakes)

Date and timeMag
Depth
LocationDetails
May 23, 1925 02:09
97 years ago
6.6

15 km
17 km NW of Fukuchiyama, Kyoto, JapanMore
Aug 25, 1924 14:31
97 years ago
6.4

25 km
North Pacific Ocean, 105 km SE of Iwaki, Fukushima, JapanMore
Aug 17, 1924 01:45
97 years ago
6.2

10 km
North Pacific Ocean, 131 km E of Hasaki, Chōshi-shi, Chiba, JapanMore
Aug 14, 1924 23:27
97 years ago
6.3

10 km
North Pacific Ocean, 134 km E of Hitachi, Ibaraki, JapanMore
Aug 14, 1924 18:02
97 years ago
7.0

15 km
North Pacific Ocean, 69 km E of Kashima-shi, Ibaraki, JapanMore
Jan 14, 1924 20:50
98 years ago
6.8

15 km
2.1 km NW of Sayama, Saitama, JapanMore
Sep 26, 1923 08:23
98 years ago
6.5

10 km
North Pacific Ocean, 22 km SE of Shimoda, Prefectura de Shizuoka, JapanMore

Earlier earthquakes in the same area

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