| Magnitude | 5.5 |
| Alert | Strong |
| Depth | 47.0 km |
| Coordinates | 33.956, 142.287 |
| UTC time | 1978-08-15 12:55:19.200 |
Earthquake details
Tuesday, August 15, 1978 Earthquake
The earthquake hit Japan on Tuesday, August 15, 1978 at 12:55 UTC with a magnitude of 5.5. The closest known location in the current dataset is Isumi (Japan - JP), about 223.3 km away. The epicenter is located at longitude 142.287 and latitude 33.956.
| Location | Chiba |
| Country | Japan (JP) |
| Severity | Strong |
Earthquake map 1978-08-15
Closest countries
The 12 closest cities near the epicenter.
| Isumi | 223.3 km |
| Kamogawa | 237.4 km |
| Hasaki | 238.3 km |
| Mobara | 244.9 km |
| Asahi | 246.5 km |
| Minamibōsō | 247.4 km |
| Ōamishirasato | 247.6 km |
| Tōgane | 249.7 km |
| Tateyama | 249.8 km |
| Ōami | 250.3 km |
| Yōkaichiba | 250.8 km |
| Sōsa | 251.9 km |
Nearby earthquakes
The latest 8 earthquakes within 100 km of this epicenter.
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Narita
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M 4.3
Kamisu
Japan · 2026-07-02 07:17 UTC
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M 4.2
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Japan · 2026-06-26 18:59 UTC
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Sakura
Japan · 2026-06-26 04:31 UTC
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Asahi
Japan · 2026-06-26 04:00 UTC
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Kamisu
Japan · 2026-06-26 03:46 UTC
248.1 km
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