October 18, 2021 at 15:21:00 JST
Kiisuido Strait · M3.4 · Shindo 1
紀伊水道
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 | Minabe Townみなべ町芝 | Wakayama | 21.8 km |
| 1 | Gobo City御坊市薗 | Wakayama | 21.9 km |
| 1 | 日高川町土生 | Wakayama | 24.7 km |
| 1 | Shirahama Town白浜町日置 | Wakayama | 34.7 km |
| 1 | Yuasa Town湯浅町青木 | Wakayama | 37.5 km |
| 1 | Minami Town美波町西の地 | Tokushima | 47.9 km |
| 1 | Anan City阿南市富岡町 | Tokushima | 48.3 km |
| 1 | Nakahechi, Tanabe City田辺市中辺路町近露 | Wakayama | 49.2 km |
| 1 | Anan City阿南市山口町 | Tokushima | 50.0 km |
| 1 | 田辺市中屋敷町 | Wakayama | — |
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: October 18, 2021 at 15:24:28Received: July 31, 2026 at 00:28:22
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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 →