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3 days agoChiba, Japan Activity Report
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Live map and archive of seismic activity in Chiba, Japan.
Common Questions about Earthquakes in Chiba
How often are earthquakes recorded in the Chiba area?
In the past 7 days, the number of earthquakes of magnitude 1.5 or above recorded in Chiba was 3. These figures describe the available records, not a prediction of future earthquakes.
What makes an earthquake “significant”?
It is not just about magnitude: reported shaking and estimated impacts also matter. The significant-events filter highlights events that meet the site’s criteria; it is not a warning or a complete list of felt earthquakes.
How strong was the largest recent earthquake in the Chiba area?
The largest earthquake recorded in Chiba in the past 7 days had a magnitude of 4.0. These figures describe the available records, not a prediction of future earthquakes.
How far back does the earthquake data go?
The historical search starts in 1900, but available records vary by region and source. Older and smaller earthquakes may be missing. A long search can reach the list’s display limit, so narrow the date range to explore it in more detail.
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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 24, 2026, 20:19 UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under 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.
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.
- CENC / Wolfx — CENC earthquake parameters via Wolfx, an independent unofficial relay.
- GFZ / GEOFON — Locations, depths and magnitudes: GFZ/GEOFON using GEVN network data (CC BY 4.0).