February 23, 2021 at 07:05:00 JST
Northern Nagano Prefecture · M2.8 · Shindo 2
長野県北部
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 |
|---|---|---|---|
| 2 | Omi Village麻績村麻 | Nagano | 6.3 km |
| 2 | 長野市信州新町新町 | Nagano | 7.8 km |
| 2 | Chikuhoku Village筑北村坂北 | Nagano | 8.0 km |
| 2 | Chikuhoku Village筑北村坂井 | Nagano | 8.3 km |
| 2 | Chikuhoku Village筑北村西条 | Nagano | 11.1 km |
| 1 | 長野市大岡 | Nagano | 1.4 km |
| 1 | Omachi City大町市八坂 | Nagano | 8.1 km |
| 1 | Ikusaka Village生坂村役場 | Nagano | 10.0 km |
| 1 | Chikuma City千曲市杭瀬下 | Nagano | 10.4 km |
| 1 | Omachi City大町市役所 | Nagano | 13.3 km |
| 1 | Ogawa Village小川村高府 | Nagano | 13.6 km |
| 1 | Chikuma City千曲市上山田温泉 | Nagano | 13.8 km |
| 1 | Sakaki Town坂城町坂城 | Nagano | 16.7 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 23, 2021 at 07:08:00Received: July 31, 2026 at 00:29:31
- P2PQUAKEIssued: February 23, 2021 at 07:08:00Received: 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 →