July 23, 2021 at 09:59:00 JST
Off the Coast of Ibaraki Prefecture · M3.8 · 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.
Scroll horizontally to see the full table.
| Shindo | Station | Prefecture | Distance from epicentre |
|---|---|---|---|
| 1 | Hitachinaka Cityひたちなか市南神敷台 | Ibaraki | 27.5 km |
| 1 | Tokai Village東海村東海 | Ibaraki | 30.6 km |
| 1 | Hitachi City日立市助川小学校 | Ibaraki | 30.8 km |
| 1 | Hitachinaka Cityひたちなか市東石川 | Ibaraki | 32.3 km |
| 1 | Mito City水戸市栗崎町 | Ibaraki | 34.5 km |
| 1 | Takahagi City高萩市安良川 | Ibaraki | 38.4 km |
| 1 | Mito City水戸市金町 | Ibaraki | 38.8 km |
| 1 | Mito City水戸市千波町 | Ibaraki | 40.5 km |
| 1 | Hokota City鉾田市汲上 | Ibaraki | 44.6 km |
| 1 | Ibaraki Town茨城町小堤 | Ibaraki | 44.8 km |
| 1 | Mito City水戸市内原町 | Ibaraki | 48.7 km |
| 1 | Omitama City小美玉市堅倉 | Ibaraki | 52.5 km |
| 1 | 茨城鹿嶋市宮中 | Ibaraki | 52.6 km |
| 1 | Kasama City笠間市石井 | Ibaraki | 59.2 km |
| 1 | Tsuchiura City土浦市常名 | Ibaraki | 71.8 km |
| 1 | 城里町小勝 | Ibaraki | — |
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: July 23, 2021 at 10:02:32Received: July 31, 2026 at 00:28:43
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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 →