April 30, 2023 at 21:21:00 JST
Off the east Coast of Chiba Prefecture · M4.2 · Shindo 1
千葉県東方沖
Places with the strongest observed Shindo
These municipalities had the highest station readings in this report. Open a place to compare this earthquake with its local history.
Shindo readings and epicentre
Each numbered marker is an actual station reading. The orange M marker shows the epicentre.
Observed Shindo by station
These are actual readings reported at JMA and partner stations, not estimates.
Scroll horizontally to see the full table.
| Shindo | Station | Prefecture | Distance from epicentre |
|---|---|---|---|
| 1 | Choshi City銚子市小畑新町 | Chiba | 18.6 km |
| 1 | Choshi City銚子市川口町 | Chiba | 20.1 km |
| 1 | Choshi City銚子市若宮町 | Chiba | 21.9 km |
| 1 | Kamisu City神栖市波崎 | Ibaraki | 24.7 km |
| 1 | Asahi City旭市萩園 | Chiba | 29.0 km |
| 1 | Asahi City旭市高生 | Chiba | 31.6 km |
| 1 | Asahi City旭市ニ | Chiba | 34.4 km |
| 1 | Katori City香取市仁良 | Chiba | 44.0 km |
Report updates
Status, time and revision available in the stored report. Field-by-field differences may not be retained.
- Confirmed
Revision 1 · p2pquake
Sources and bulletins
Multiple source bulletins do not necessarily represent multiple corrections.
- P2PQUAKEIssued: April 30, 2023 at 21:25:25Received: July 31, 2026 at 00:25:40
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Understand this earthquake report
Read Shindo, magnitude and JMA information in the right context.
A guide to event and issue times, hypocentre, depth, Shindo, tsunami information, preliminary reports and corrections.
Read guide →5 min readWhat does earthquake depth mean?A plain-language guide to hypocentre depth and why shallow and deep earthquakes can feel very different.
Read guide →5 min readMagnitude vs Shindo: what is the difference?Magnitude describes the size of an earthquake at its source; Shindo describes shaking at a place. Learn why they are not interchangeable.
Read guide →6 min readCan every earthquake cause a tsunami?What creates a tsunami, why magnitude alone is not enough and when to leave the coast immediately.
Read guide →