August 31, 2018 at 21:24:00 JST
Iyonada Sea · M3.8 · Shindo 2
伊予灘
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 |
|---|---|---|---|
| 2 | Ikata Town伊方町湊浦 | Ehime | 13.1 km |
| 2 | Ozu City大洲市大洲 | Ehime | 16.4 km |
| 2 | Yawatahama City八幡浜市五反田 | Ehime | 17.0 km |
| 1 | Ozu City大洲市長浜 | Ehime | 7.5 km |
| 1 | Yawatahama City八幡浜市保内町 | Ehime | 13.3 km |
| 1 | Yawatahama City八幡浜市広瀬 | Ehime | 16.5 km |
| 1 | Uchiko Town内子町内子 | Ehime | 23.9 km |
| 1 | Seiyo City西予市三瓶町 | Ehime | 24.5 km |
| 1 | Uchiko Town内子町平岡 | Ehime | 25.4 km |
| 1 | Seiyo City西予市宇和町 | Ehime | 28.5 km |
| 1 | Iyo City伊予市中山町 | Ehime | 29.1 km |
| 1 | Seiyo City西予市明浜町 | Ehime | 31.2 km |
| 1 | Ozu City大洲市肱川町 | Ehime | 31.7 km |
| 1 | Seiyo City西予市野村町 | Ehime | 33.7 km |
| 1 | Ozu City大洲市河辺町 | Ehime | 33.9 km |
| 1 | Suo Oshima Town周防大島町平野 | Yamaguchi | 34.6 km |
| 1 | Suo Oshima Town周防大島町西安下庄 | Yamaguchi | 35.1 km |
| 1 | Kaminoseki Town上関町長島 | Yamaguchi | 37.1 km |
| 1 | Uwajima City宇和島市吉田町 | Ehime | 37.8 km |
| 1 | Matsuyama City松山市富久町 | Ehime | 39.1 km |
| 1 | Uwajima City宇和島市三間町 | Ehime | 39.5 km |
| 1 | Tobe Town砥部町宮内 | Ehime | 39.8 km |
| 1 | Seiyo City西予市城川町 | Ehime | 40.7 km |
| 1 | Suo Oshima Town周防大島町久賀 | Yamaguchi | 40.9 km |
| 1 | Suo Oshima Town周防大島町小松 | Yamaguchi | 41.0 km |
| 1 | Yanai City柳井市大畠 | Yamaguchi | 45.3 km |
| 1 | Kumakogen Town久万高原町久万 | Ehime | 46.9 km |
| 1 | Matsuyama City松山市中島大浦 | Ehime | 47.2 km |
| 1 | Hirao Town平生町平生 | Yamaguchi | 48.5 km |
| 1 | Yanai City柳井市南町 | Yamaguchi | 48.6 km |
| 1 | Matsuno Town松野町松丸 | Ehime | 50.2 km |
| 1 | 梼原町広野 | Kochi | 51.5 km |
| 1 | Matsuyama City松山市北条辻 | Ehime | 52.6 km |
| 1 | Hikari City光市中央 | Yamaguchi | 58.4 km |
| 1 | Kunisaki City国東市鶴川 | Oita | 62.2 km |
| 1 | Kunisaki City国東市田深 | Oita | 62.3 km |
| 1 | Etajima City江田島市大柿町 | Hiroshima | 63.5 km |
| 1 | Kudamatsu City下松市大手町 | Yamaguchi | 67.7 km |
| 1 | Kure City呉市二河町 | Hiroshima | 73.6 km |
| 1 | Sukumo City宿毛市桜町 | Kochi | 79.4 km |
| 1 | Kure City呉市安浦町 | Hiroshima | 81.7 km |
| 1 | Bungotakada City豊後高田市御玉 | Oita | 88.3 km |
| 1 | Hofu City防府市西浦 | Yamaguchi | 93.6 km |
| 1 | 松山市北持田町 | Ehime | — |
| 1 | 岩国市玖珂総合支所 | Yamaguchi | — |
| 1 | 田布施町下田布施 | Yamaguchi | — |
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 31, 2018 at 21:28:00Received: July 31, 2026 at 00:35:40
- P2PQUAKEIssued: August 31, 2018 at 21:28:00Received: July 31, 2026 at 00:35:40
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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.
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