February 21, 2023 at 08:39:00 JST
Off the east Coast of Chiba Prefecture · M3.4 · 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.
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| Shindo | Station | Prefecture | Distance from epicentre |
|---|---|---|---|
| 2 | Chonan Town長南町総合グラウンド | Chiba | 15.1 km |
| 2 | Ichihara City市原市姉崎 | Chiba | 32.7 km |
| 1 | Ichinomiya Town一宮町一宮 | Chiba | 4.3 km |
| 1 | Chosei Village長生村本郷 | Chiba | 4.7 km |
| 1 | Mutsuzawa Town睦沢町下之郷 | Chiba | 8.5 km |
| 1 | Mobara City茂原市道表 | Chiba | 10.5 km |
| 1 | Isumi Cityいすみ市岬町長者 | Chiba | 11.2 km |
| 1 | Kujukuri Town九十九里町片貝 | Chiba | 14.9 km |
| 1 | Oamishirasato City大網白里市大網 | Chiba | 15.2 km |
| 1 | Isumi Cityいすみ市国府台 | Chiba | 15.6 km |
| 1 | Nagara Town長柄町桜谷 | Chiba | 15.8 km |
| 1 | Isumi Cityいすみ市大原 | Chiba | 16.7 km |
| 1 | Togane City東金市東新宿 | Chiba | 18.0 km |
| 1 | Togane City東金市日吉台 | Chiba | 19.6 km |
| 1 | Katsuura City勝浦市新官 | Chiba | 28.7 km |
| 1 | Katsuura City勝浦市墨名 | Chiba | 28.9 km |
| 1 | Kimitsu City君津市久留里市場 | Chiba | 32.0 km |
| 1 | Chiba Chuo Ward千葉中央区中央港 | Chiba | 35.0 km |
| 1 | Chiba Hanamigawa Ward千葉花見川区花島町 | Chiba | 41.3 km |
| 1 | Kisarazu City木更津市富士見 | Chiba | 43.7 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: February 21, 2023 at 08:41:58Received: July 31, 2026 at 00:25:59
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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 →