February 23, 2021 at 09:52:00 JST
Off the Coast of Fukushima Prefecture · M4.0 · Shindo 1
福島県沖
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 |
|---|---|---|---|
| 1 | Minamisoma City南相馬市原町区高見町 | Fukushima | 54.0 km |
| 1 | Namie Town浪江町幾世橋 | Fukushima | 54.3 km |
| 1 | Okuma Town大熊町大川原 | Fukushima | 61.6 km |
| 1 | Soma City相馬市中村 | Fukushima | 63.9 km |
| 1 | Naraha Town楢葉町北田 | Fukushima | 64.6 km |
| 1 | Yamamoto Town山元町浅生原 | Miyagi | 75.0 km |
| 1 | Tamura City田村市船引町 | Fukushima | 92.2 km |
| 1 | Ishinomaki City石巻市桃生町 | Miyagi | 111.1 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 23, 2021 at 09:55:00Received: July 31, 2026 at 00:29:31
- P2PQUAKEIssued: February 23, 2021 at 09:55:00Received: July 31, 2026 at 00:29:31
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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 →