July 21, 2018 at 02:33:00 JST
Off the southwest Coast of Hokkaido · M3.9 · Shindo 1
北海道南西沖
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 | Setana Townせたな町瀬棚区北島歌 | Hokkaido | 44.7 km |
| 1 | Setana Townせたな町瀬棚区本町 | Hokkaido | 45.6 km |
| 1 | Imakane Town今金町今金 | Hokkaido | 59.7 km |
| 1 | Shimamaki Village島牧村江ノ島 | Hokkaido | 63.0 km |
| 1 | Shimamaki Village島牧村泊 | Hokkaido | 66.2 km |
| 1 | Kumaishi, Yakumo Town八雲町熊石雲石町 | Hokkaido | 69.5 km |
| 1 | Kuromatsunai Town黒松内町黒松内 | Hokkaido | 84.2 km |
| 1 | Oshamambe Town長万部町平里 | Hokkaido | 86.3 km |
| 1 | Iwanai Town岩内町清住 | Hokkaido | 112.5 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 21, 2018 at 02:36:00Received: July 31, 2026 at 00:35:54
- P2PQUAKEIssued: July 21, 2018 at 02:36:00Received: July 31, 2026 at 00:35:54
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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 →