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© 2026 Hindsite. UK publication.Composed by Claude · libel-checked · cited inline.

2026 Sanriku earthquake — Hindsite — Hindsite

2026 Sanriku earthquake

60 sources spanning 1971–2026

15.01 cm/s (5.91 in/s)

3D cluster graph · 14 →

On 20 April 2026 at 16:53 JST (07:53 UTC), a MJMA 7.7 (Mw 7.4–7.5) earthquake struck off the Sanriku Coast of Honshu, Japan, along the Japan Trench. The earthquake caused strong shaking in Iwate and Aomori, with a maximum intensity of 5-upper (5+) on the Japan Meteorological Agency seismic intensity scale, recorded in Hashikami, Aomori. Additionally, it generated long-period ground motion of class 3 in the southern Akita and northern Miyagi prefectures

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On 20 April 2026 at 16:53 JST (07:53 UTC), a MJMA 7.7 (Mw 7.4–7.5) earthquake struck off the Sanriku Coast of Honshu, Japan, along the Japan Trench. The earthquake caused strong shaking in Iwate and Aomori, with a maximum intensity of 5-upper (5+) on the Japan Meteorological Agency seismic intensity scale, recorded in Hashikami, Aomori. Additionally, it generated long-period ground motion of class 3 in the southern Akita and northern Miyagi prefectures

Hero image for 2026 Sanriku earthquake — Pictured·Asahi Shimbun·「地震が襲った瞬間」実は能登半島地震の動画またSNSでフェイク

2026

Evaluation of Earthquake Offshore of Sanriku on April 20, 202614 May 2026

令和8年4月20日青森県三陸沖地震に係る被害報 (第8報)27 Apr 2026

三陸沖を震源とする地震による被害及び消防機関等の対応状況（第１１報）21 Apr 2026

「後発地震注意情報」今後1週間は大規模地震に備え警戒青森で震度5強踏切内で道路陥没、ビルの外壁落下も｜FNNプライムオンライン21 Apr 2026

「地震が襲った瞬間」実は能登半島地震の動画またSNSでフェイク21 Apr 2026

三陸沖を震源とする地震による被害及び消防機関等の対応状況（第８報）21 Apr 2026

2026-Sanriku-Earthquake20 Apr 2026

Japan says bigger tsunami may hit after earthquake off north-east coast - follow live20 Apr 2026

Earthquake Information20 Apr 2026

Global CMT Catalog Search20 Apr 2026

【速報中】北海道太平洋沿岸中部の津波警報は注意報に切り替え後発地震注意情報発表道内約4万4千人に避難指示20 Apr 2026

【速報中】岩手・久慈で８０ｃｍの津波、「後発地震注意情報」発表…津波警報は津波注意報に切り替え20 Apr 2026

三陸沖M7.7地震、岩手県久慈港に津波80センチ後発地震情報も発表20 Apr 2026

三陸沖地震で最大８０ｃｍの津波、昨年１２月以来の「後発地震注意情報」…１週間はすぐ逃げられる態勢維持を20 Apr 2026

地震被害「重傷2人軽傷4人」官房長官宮城では道路陥没も20 Apr 2026

通算2度目の後発地震注意情報対象自治体は? 青森震度5強20 Apr 2026

Japan warns of slightly increased risk of mega-quake after a 7.7-magnitude one20 Apr 2026

津波警報直後から SNSで偽情報・偽動画相次ぐ注意を20 Apr 2026

青森で震度５強、津波観測「後発地震注意」２回目、気象庁20 Apr 2026

Global CMT Catalog Buscar20 Apr 2026

Động đất mạnh gây cảnh báo sóng thần tại Nhật Bản20 Apr 2026

日本東北規模7.5地震引發海嘯警報　岩手縣現0.8公尺浪高20 Apr 2026

地震情報 : 詳細情報20 Apr 2026

北海道・三陸沖後発地震注意情報発表（気象庁）20 Apr 2026

地震情報 04月20日 16時53分頃発生最大震度：5強20 Apr 2026

三陸沖を震源とする地震による被害状況等について（第 1 報）20 Apr 2026

Archived copy+ 1 event20 Apr 2026

2004

Fault plane geometry in the source region of the 1994 Sanriku-oki earthquake15 Jun 2004

Seismic structure and seismogenesis off Sanriku region, northeastern Japan15 Jun 2004

Geometría del plano de falla en la región fuente del Terremoto de Sanriku-oki de 199410 Jun 2004

2001

Space–time distribution of interplate moment release including slow earthquakes and the seismo-geodetic coupling in the Sanriku-oki region along the Japan trench15 Jun 2001

Distribución espacio-temporal de la liberación de momento interplaca, incluidos terremotos lentos y el acoplamiento sismo-geodésico en la región de Sanriku-oki a lo largo de Japón trinchera10 Jun 2001

2000

Distribution of seismic coupling on the subducting plate boundary in northeastern Japan inferred from GPS observations15 Jun 2000

Distribución del acoplamiento sísmico en el límite de la placa subducida en el noreste de Japón inferida a partir de GPS observaciones10 Jun 2000

1971

Seismological evidence for a lithospheric normal faulting – the Sanriku earthquake of 193315 Jun 1971

Evidencia sismológica de una falla normal litosférica: el terremoto de Sanriku de 193310 Jun 1971

Undated

M 7.4 - 100 km ENE of Miyako, Japan 2026GOV

USGS earthquake catalogGOV

M 6.8 - 122 km E of Yamada, Japan 2025GOV

M 5.6 - 113 km E of Miyako, Japan 2026GOV

Japan earthquake mapped: Country on high alert for large quake after tsunami warnings

Terremoto de Sanriku de 2026

USGS earthquake catalogGOV

Japón emite una rara advertencia especial sobre la posibilidad de un terremoto más potente

北海道と東北に一時津波警報、岩手・久慈で80センチ観測青森震度5強

令和8年4月20日青森県三陸沖地震に係る被害報(第2報)

S%C3%A9isme de 2026 de la c%C3%B4te de Sanriku

Gempa bumi Sanriku 2026

%E4%B8%89%E9%99%B8%E6%B2%96%E5%9C%B0%E9%9C%87 (2026%E5%B9%B4)

気象庁会見「落石やがけ崩れ、今後の地震や雨に注意」「今後2、3日の地震に注意」

地震で道路陥没か、JR仙石線は一部区間で終日運休 22日再開

「後発地震注意情報」備え続くパネルが約20mの高さから落下した施設は修繕作業へ青森・八戸市

2026%EB%85%84 %EC%82%B0%EB%A6%AC%EC%BF%A0 %ED%95%B4%EC%97%AD %EC%A7%80%EC%A7%84

長周期地震動の観測結果

緊急地震速報（予報）の内容

2026 %D8%B3%D8%A7%D9%86%D8%B1%DB%8C%DA%A9%D9%88 %D8%A8%D9%8F%D9%86%DB%8C%D9%8F%D9%84

Trz%C4%99sienie ziemi w Sanriku (2026)

%E0%B9%81%E0%B8%9C%E0%B9%88%E0%B8%99%E0%B8%94%E0%B8%B4%E0%B8%99%E0%B9%84%E0%B8%AB%E0%B8%A7%E0%B8%99%E0%B8%AD%E0%B8%81%E0%B8%8A%E0%B8%B2%E0%B8%A2%E0%B8%9D%E0%B8%B1%E0%B9%88%E0%B8%87%E0%B8%8B%E0%B8%B1%E0%B8%99%E0%B8%A3%E0%B8%B4%E0%B8%81%E0%B8%B8 %E0%B8%9E.%E0%B8%A8. 2569

%C4%90%E1%BB%99ng %C4%91%E1%BA%A5t Sanriku 2026

2026%E5%B9%B4%E4%B8%89%E9%99%86%E8%BF%91%E6%B5%B7%E5%9C%B0%E9%9C%87