3.9
Earthquake Details: off the east coast of Asahi, Chiba, Japan
Oct 7, 2026, 19:36:00
A magnitude 3.9 earthquake occurred near off the east coast of Asahi, Chiba, Japan on Oct 7, 2026 at 19:36:00. The seismic event was recorded at a depth of 500 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Regional Seismicity
Technical Details
Depth500 km
Significance0
Latitude35.6000
Longitude140.7000
Event IDjma:20261008043638
Magnitude3.9
Updated:Oct 7, 2026, 19:39:00 UTC
External Resources
View on JMA Official SiteLoading map...
Time & depth
- Local time
- Oct 8, 2026, 04:36:00 GMT+9
- UTC
- Oct 7, 2026, 19:36:00 UTC
500 km · Deep-focus
More than 300 km deep. Deep earthquakes can be felt across a wide area.
Nearby major cities
Nearby event sequence · 5
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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: Oct 7, 2026, 19:39 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.