August 4, 2021 at 07:11:00 JST
Off the Coast of Ibaraki Prefecture · M4.9 · Shindo 1
茨城県沖
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 | Choshi City銚子市川口町 | Chiba | 123.1 km |
| 1 | Choshi City銚子市小畑新町 | Chiba | 123.9 km |
| 1 | 茨城鹿嶋市鉢形 | Ibaraki | 133.4 km |
| 1 | Kamisu City神栖市溝口 | Ibaraki | 134.2 km |
| 1 | 茨城鹿嶋市宮中 | Ibaraki | 134.6 km |
| 1 | Hitachinaka Cityひたちなか市南神敷台 | Ibaraki | 135.8 km |
| 1 | Hitachinaka Cityひたちなか市山ノ上町 | Ibaraki | 136.9 km |
| 1 | Hitachi City日立市助川小学校 | Ibaraki | 137.1 km |
| 1 | Hokota City鉾田市汲上 | Ibaraki | 138.1 km |
| 1 | Tokai Village東海村東海 | Ibaraki | 140.6 km |
| 1 | Asahi City旭市南堀之内 | Chiba | 141.7 km |
| 1 | Hokota City鉾田市鉾田 | Ibaraki | 142.5 km |
| 1 | Mito City水戸市栗崎町 | Ibaraki | 142.9 km |
| 1 | Itako City潮来市堀之内 | Ibaraki | 144.1 km |
| 1 | Katori City香取市仁良 | Chiba | 144.1 km |
| 1 | Katori City香取市佐原平田 | Chiba | 147.7 km |
| 1 | Mito City水戸市金町 | Ibaraki | 148.0 km |
| 1 | Katori City香取市役所 | Chiba | 148.0 km |
| 1 | Mito City水戸市千波町 | Ibaraki | 149.4 km |
| 1 | Tako Town多古町多古 | Chiba | 156.1 km |
| 1 | Omitama City小美玉市小川 | Ibaraki | 156.5 km |
| 1 | Mito City水戸市内原町 | Ibaraki | 157.3 km |
| 1 | Omitama City小美玉市上玉里 | Ibaraki | 158.4 km |
| 1 | Kasama City笠間市石井 | Ibaraki | 168.4 km |
| 1 | Ishioka City石岡市柿岡 | Ibaraki | 171.8 km |
| 1 | Tsuchiura City土浦市常名 | Ibaraki | 172.2 km |
| 1 | Togane City東金市日吉台 | Chiba | 173.6 km |
| 1 | Tsukuba Cityつくば市天王台 | Ibaraki | 181.0 km |
| 1 | Mashiko Town益子町益子 | Tochigi | 182.6 km |
| 1 | Ichikai Town市貝町市塙 | Tochigi | 183.4 km |
| 1 | Moka City真岡市田町 | Tochigi | 188.7 km |
| 1 | Chikusei City筑西市舟生 | Ibaraki | 195.0 km |
| 1 | Sukagawa City須賀川市八幡山 | Fukushima | 195.5 km |
| 1 | Chiba Mihama Ward千葉美浜区ひび野 | Chiba | 195.9 km |
| 1 | Shirakawa City白河市新白河 | Fukushima | 199.0 km |
| 1 | Tenei Village天栄村下松本 | Fukushima | 202.8 km |
| 1 | Oyama City小山市神鳥谷 | Tochigi | 207.0 km |
| 1 | Konan, Koriyama City郡山市湖南町 | Fukushima | 220.5 km |
| 1 | Shibukawa City渋川市赤城町 | Gunma | 277.0 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: August 4, 2021 at 07:15:45Received: July 31, 2026 at 00:28:38
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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 →