August 10, 2021 at 01:15:00 JST
Off the Coast of Ibaraki Prefecture · M4.0 · Shindo 1
茨城県沖
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.
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| Shindo | Station | Prefecture | Distance from epicentre |
|---|---|---|---|
| 1 | Hitachi City日立市助川小学校 | Ibaraki | 53.6 km |
| 1 | Takahagi City高萩市安良川 | Ibaraki | 55.7 km |
| 1 | Kitaibaraki City北茨城市磯原町 | Ibaraki | 59.9 km |
| 1 | Hitachiomiya City常陸大宮市北町 | Ibaraki | 72.7 km |
| 1 | Mito City水戸市内原町 | Ibaraki | 75.5 km |
| 1 | Hitachiomiya City常陸大宮市上小瀬 | Ibaraki | 82.2 km |
| 1 | Kasama City笠間市石井 | Ibaraki | 86.1 km |
| 1 | Daigo Town大子町池田 | Ibaraki | 86.2 km |
| 1 | Shirakawa City白河市新白河 | Fukushima | 120.5 km |
| 1 | Tamura City田村市都路町 | Fukushima | 121.1 km |
| 1 | Namie Town浪江町幾世橋 | Fukushima | 122.8 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 10, 2021 at 01:18:19Received: July 31, 2026 at 00:28:36
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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 →