July 27, 2021 at 13:39:00 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.
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 | Hitachi City日立市助川小学校 | Ibaraki | 49.2 km |
| 1 | Tokai Village東海村東海 | Ibaraki | 58.2 km |
| 1 | Hitachinaka Cityひたちなか市南神敷台 | Ibaraki | 60.5 km |
| 1 | Hitachinaka Cityひたちなか市山ノ上町 | Ibaraki | 62.1 km |
| 1 | Mito City水戸市栗崎町 | Ibaraki | 67.0 km |
| 1 | Mito City水戸市千波町 | Ibaraki | 71.9 km |
| 1 | Hokota City鉾田市汲上 | Ibaraki | 79.2 km |
| 1 | 茨城鹿嶋市宮中 | Ibaraki | 85.8 km |
| 1 | Kasama City笠間市笠間 | Ibaraki | 88.6 km |
| 1 | Kasama City笠間市石井 | Ibaraki | 89.1 km |
| 1 | Katori City香取市仁良 | Chiba | 104.8 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: July 27, 2021 at 13:42:32Received: July 31, 2026 at 00:28:39
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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 →