| Magnitude | 5.4 |
| Alert | Strong |
| Depth | 73.9 km |
| Coordinates | 34.778, 140.826 |
| UTC time | 1985-10-03 21:28:02.060 |
Earthquake details
Thursday, October 3, 1985 Earthquake
The earthquake hit Japan on Thursday, October 3, 1985 at 21:28 UTC with a magnitude of 5.4. The closest known location in the current dataset is Isumi (Japan - JP), about 63.3 km away. The epicenter is located at longitude 140.826 and latitude 34.778.
| Location | Mobara |
| Country | Japan (JP) |
| Severity | Strong |
Earthquake map 1985-10-03
Closest countries
The 12 closest cities near the epicenter.
| Isumi | 63.3 km |
| Kamogawa | 75.1 km |
| Mobara | 86.8 km |
| Minamibōsō | 86.8 km |
| Tateyama | 90.5 km |
| Ōamishirasato | 92.4 km |
| Ōami | 94.4 km |
| Tōgane | 95.6 km |
| Sanmu | 101.6 km |
| Sodegaura | 101.9 km |
| Yōkaichiba | 105.7 km |
| Kisarazu | 105.7 km |
Nearby earthquakes
The latest 8 earthquakes within 100 km of this epicenter.
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Chiba
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Tateyama
Japan · 2026-06-30 15:02 UTC
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M 4.5
Asahi
Japan · 2026-06-26 04:00 UTC
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M 4.2
Isumi
Japan · 2026-06-18 18:43 UTC
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M 4.3
Isumi
Japan · 2026-05-23 06:20 UTC
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M 4.4
Tateyama
Japan · 2026-03-22 08:56 UTC
75.5 km
M 4.4
Kamisu
Japan · 2026-02-26 11:55 UTC
81.1 km
M 4.4
Isumi
Japan · 2026-02-19 08:24 UTC
63.9 km
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