August 23, 2021 at 10:43:00 JST
Off the Coast of Iwate Prefecture · M4.0 · Shindo 1
岩手県沖
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 | Kamaishi City釜石市只越町 | Iwate | 41.1 km |
| 1 | Kamaishi City釜石市中妻町 | Iwate | 42.0 km |
| 1 | Ofunato City大船渡市大船渡町 | Iwate | 42.6 km |
| 1 | Ofunato City大船渡市猪川町 | Iwate | 47.2 km |
| 1 | Kesennuma City気仙沼市唐桑町 | Miyagi | 49.0 km |
| 1 | Rikuzentakata City陸前高田市高田町 | Iwate | 50.3 km |
| 1 | Kesennuma City気仙沼市笹が陣 | Miyagi | 55.7 km |
| 1 | Kesennuma City気仙沼市赤岩 | Miyagi | 55.8 km |
| 1 | Sumita Town住田町世田米 | Iwate | 55.9 km |
| 1 | Ichinoseki City一関市室根町 | Iwate | 66.2 km |
| 1 | Minamisanriku Town南三陸町歌津 | Miyagi | 66.7 km |
| 1 | Ichinoseki City一関市大東町 | Iwate | 69.8 km |
| 1 | Ichinoseki City一関市藤沢町 | Iwate | 75.3 km |
| 1 | Ichinoseki City一関市千厩町 | Iwate | 75.9 km |
| 1 | Ishinomaki City石巻市北上町 | Miyagi | 82.2 km |
| 1 | Ichinoseki City一関市東山町 | Iwate | 82.3 km |
| 1 | Tome City登米市東和町 | Miyagi | 82.9 km |
| 1 | Tome City登米市中田町 | Miyagi | 89.7 km |
| 1 | Ichinoseki City一関市花泉町 | Iwate | 90.5 km |
| 1 | Tome City登米市豊里町 | Miyagi | 94.2 km |
| 1 | Hiraizumi Town平泉町平泉 | Iwate | 94.4 km |
| 1 | Ishinomaki City石巻市桃生町 | Miyagi | 96.7 km |
| 1 | Kitakami City北上市相去町 | Iwate | 99.4 km |
| 1 | Ishinomaki City石巻市泉町 | Miyagi | 100.8 km |
| 1 | 栗原市栗駒 | Miyagi | 106.6 km |
| 1 | 大崎市田尻 | Miyagi | 108.5 km |
| 1 | 南三陸町志津川 | Miyagi | — |
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: August 23, 2021 at 10:46:24Received: July 31, 2026 at 00:28:36
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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 →