4.4
Earthquake Details: 90 km ESE of Tomioka, Japan
Aug 23, 2026, 00:32:24
A magnitude 4.4 earthquake occurred near 90 km ESE of Tomioka, Japan on Aug 23, 2026 at 00:32:24. The seismic event was recorded at a depth of 24.09 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Regional Seismicity
Technical Details
Depth24.09 km
Significance298
Latitude36.9495
Longitude141.9148
Event IDus6000tmw4
Magnitude4.4
Updated:Aug 23, 2026, 02:15:30 UTC
External Resources
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Time & depth
- Local time
- Aug 23, 2026, 09:32:24 GMT+9
- UTC
- Aug 23, 2026, 00:32:24 UTC
24.09 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
Nearby event sequence · 12
M4.25 km N of Hitachi, JapanBeforeM5.5148 km SSE of Tateyama, JapanBeforeM5.9near the east coast of Honshu, JapanBeforeM5.84 km N of Toride, JapanBeforeM2.3Noto, Ishikawa PrefectureBeforeM3.8off the south coast of Boso PeninsulaAfterM4.3off the coast of Iwate PrefectureAfterM4.3off the coast of Iwate PrefectureAfterM4.5off the coast of Fukushima PrefectureAfterM3.4Southern Ibaraki PrefectureAfterM4.8147 km E of Miyako, JapanAfterM6.1off the coast of SanrikuAfter
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Earthquake information is automatically aggregated from the official seismic agencies listed below. Preliminary measurements can change as agencies review an event; use local emergency authorities for safety decisions. Latest successful data update: Aug 23, 2026, 02:15 UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0. CC BY 4.0
- JMA — Source: Japan Meteorological Agency (JMA).
- Geoscience Australia — Based on Australian Earthquakes data by Geoscience Australia. © Commonwealth of Australia. Licensed under CC BY 4.0; the section 5 disclaimer applies. CC BY 4.0
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.