August 9, 2023 at 20:41:00 JST
Off the east Coast of Chiba Prefecture · M3.9 · Shindo 2
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.
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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 |
|---|---|---|---|
| 2 | Katsuura City勝浦市新官 | Chiba | 26.1 km |
| 2 | Katsuura City勝浦市墨名 | Chiba | 26.9 km |
| 2 | Otaki Town大多喜町大多喜 | Chiba | 38.2 km |
| 2 | Chonan Town長南町総合グラウンド | Chiba | 45.9 km |
| 1 | Isumi Cityいすみ市大原 | Chiba | 25.4 km |
| 1 | Isumi Cityいすみ市岬町長者 | Chiba | 29.9 km |
| 1 | Isumi Cityいすみ市国府台 | Chiba | 33.1 km |
| 1 | Ichinomiya Town一宮町一宮 | Chiba | 36.8 km |
| 1 | Kamogawa City鴨川市内浦 | Chiba | 37.2 km |
| 1 | Kamogawa City鴨川市横渚 | Chiba | 45.1 km |
| 1 | Kamogawa City鴨川市八色 | Chiba | 45.8 km |
| 1 | Chonan Town長南町長南 | Chiba | 45.9 km |
| 1 | Kimitsu City君津市久留里市場 | Chiba | 53.1 km |
| 1 | Tateyama City館山市長須賀 | Chiba | 68.2 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: August 9, 2023 at 20:44:34Received: July 31, 2026 at 00:25:06
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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 →