3.5
Earthquake Details: northeastern Chiba
Sep 30, 2026, 21:17:00
A magnitude 3.5 earthquake occurred near northeastern Chiba on Sep 30, 2026 at 21:17:00. 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
Latitude35.7000
Longitude140.6000
Event IDjma:20261001061703
Magnitude3.5
Updated:Sep 30, 2026, 21:20:00 UTC
External Resources
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Time & depth
- Local time
- Oct 1, 2026, 06:17:00 GMT+9
- UTC
- Sep 30, 2026, 21:17:00 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 · 11
M3.4off the coast of IwateBeforeM3.3off the coast of IwateBeforeM2.9Aizu, FukushimaBeforeM3.5off the coast of MiyagiBeforeM4.3Izu Islands, Japan regionBeforeM4.3near the south coast of Honshu, JapanBeforeM4.9near the south coast of Honshu, JapanBeforeM2.6southern WakayamaBeforeM4.4102 km E of Miyako, JapanBeforeM3.0northeastern ChibaBeforeM2.9Aizu, FukushimaBefore
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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: Sep 30, 2026, 21:20 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.