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[INTERNATIONAL] · Japan, Russia · 51 sources

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Part of situation: Kamchatka earthquake and Japan alert error (3 clusters)

Japan Meteorological Agency issues false magnitude 9.9 earthquake warning

earthquake warning error Japan Meteorological Agency magnitude 9.9 false alarm seismic monitoring failure Kamchatka earthquake

The Japan Meteorological Agency (JMA) issued an erroneous earthquake early warning for a magnitude 9.9 seismic event near the Kuril Islands on October 16, 2026. The alert triggered emergency alarms on millions of mobile devices and caused temporary disruptions to public transportation, including the suspension of Shinkansen bullet trains and Sapporo trams.

The JMA retracted the warning within minutes, clarifying that the actual earthquake was a magnitude 6.9 event located near the Kamchatka Peninsula in Russia at a depth of 160 kilometers. The agency attributed the error to a technical anomaly in calculating the epicenter, noting that the system incorrectly assumed the epicenter was approximately 680 kilometers further from Japan than its actual location. This error occurred because a function designed to exclude observation points more than 700km from an epicenter failed to operate correctly.

JMA official Shinya Tsukada issued a formal apology for the distress and inconvenience caused. Additionally, NTT Docomo reported a system malfunction that prevented the delivery of emergency area mail alerts to users in several regions, including Hokkaido and Kanto, during the incident. Authorities have ruled out the possibility of a cyberattack.

Entities

Aki Ebita · Ayataka Ebita · Japan · Japan Meteorological Agency · Kamchatka Peninsula · Kuril Islands · NTT Docomo · Shinkansen · Shinya Tsukada

Claims

What the coverage asserts, and how many sources carry each claim.

Sources

Jepang Tarik Peringatan Gempa Magnitudo 9,9 yang Salah [seputaraceh.id]
إنذار بزلزال قوته 9.9 درجات يربك اليابان [dailynewslb.com]
Αναστατώθηκε η Ιαπωνία για σεισμό 9,9 Ρίχτερ, από λάθος της Μετεωρολογικής Υπηρεσίας [tempo24.news]
Ιαπωνία: Συναγερμός για σεισμό 9,9 Ρίχτερ που αποσύρθηκε ως λανθασμένος [cretaone.gr]
Tarihin en büyüğü: 9.9’luk deprem alarm Japonya’yı ayağa kaldırdı [sondakikakibris.com]
Japan's Earthquake Alert: A False Alarm and Its Implications - Daily Digest - News, Craic & Everything in Between [dailydigest.ie]
9.9'luk deprem uyarısı ülkeyi karıştırdı! [www.sehrivangazetesi.com]
上野公園白鳥ボートに乗ってる時に9.9の大地震のアラームが鳴ったよ [kaigai.ch]
🚨 ¡Pánico en Japón! Anunciaron el peor terremoto de la historia por un error informático [ciudadano.news]
Japão pede desculpas após alerta falso de terremoto de magnitude 9,9 [www.brasilemfolhas.com.br]
Τους «έκοψε το αίμα»: Προειδοποίηση για σεισμό 9,9 Ρίχτερ στην Ιαπωνία – Ανακλήθηκε [www.tromaktiko.gr]
ドコモ、10月16日の緊急地震速報でエリアメールが配信されない不具合 [orefolder.jp]
L'agence japonaise annule l'alerte au séisme M9.9 émise par erreur et le transit est perturbé - Japon Samouraï [japonsamourai.fr]
【速報】10/16（金）12時40分ごろ緊急地震速報、市川市でも「千島列島で地震」と通知、その後取り消しに | 市川にゅ～す - 千葉県市川市の地域情報ブログ [ichi-24.jp]
Японската метеорологична агенция отмени погрешно издадено предупреждение за земетресение с [novini247.com]
10月16日北海道から東海の緊急地震速報は……。 | 日々是～まんぷく [puku2.jugem.jp]
Jepun tarik balik amaran gempa bumi 9.9 magnitud [berita.rtm.gov.my]
Συναγερμός για σεισμό 9,9 Ρίχτερ στην Ιαπωνία από λάθος της Μετεωρολογικής Υπηρεσίας [seleo.gr]
Japón emite por error alerta sísmica por terremoto de magnitud 9,9 [deultimominuto.com]
Japan 9.9 Earthquake Alert Retracted After System Error [metropolisjapan.com]
Sistema de alerta temprana de Japón anunció por error un terremoto de magnitud 9.9 y desató el pánico: ¿qué pasó? [rpp.pe]
緊急地震速報がドコモの端末で配信されず　原因はシステム不具合と判明 : ガハろぐNewsヽ(･ω･)/ｽﾞｺｰ [gahalog.2chblog.jp]
日本气象厅速报9.9级地震后立即取消并道歉 [sputniknews.cn]
「M9.9」緊急地震速報、初の「警報取り消し」で気象庁が謝罪 サイバー攻撃の可能性は「ない」と明言 [www.advertimes.com]
獨家／規模9. 9強震警報狂響、9分鐘後卻撤回！亞帕運現場虛驚 | ETtoday運動雲 | ETtoday新聞雲 [sports.ettoday.net]
Liên tiếp 4 trận động đất ở Quảng Ngãi gây lo ngại về hoạt động địa chất năm 2026 [soha.vn]
Jepun tersilap keluar amaran gempa paling dahsyat [www.utusan.com.my]
東北新幹線が一時運転見合わせ [smart.shimotsuke.co.jp]
Falsa alarma de sismo 9.9 en Japón causa momentos de tensión [laverdad.com.mx]
ドコモ、16日地震の「緊急地震速報」不配の原因を解消 [k-tai.watch.impress.co.jp]
Çfarë ndodhi?! Alarm i rremë për tërmet 9.9 ballë në Japoni, autoritetet kërkojnë falje për gabimin [www.balkanweb.com]
Ειδήσεις Κύπρος [www.sigmalive.com]
緊急地震速報 異例の取り消し マグニチュード6.9→9.9「過大に推定」 気象庁は3度の会見で謝罪　原因は2つの誤り【news23】 [news.cube-soft.jp]
日本、誤ったマグニチュード9.9地震警報を撤回 [www.arabnews.jp]
Japan issues false magnitude 9.9 earthquake alert, apologises after withdrawing warning [english.mathrubhumi.com]
Ιαπωνία: Ανακλήθηκε εσφαλμένη προειδοποίηση για σεισμό 9,9 Ρίχτερ [www.ertnews.gr]
¡Error en Japón! Alerta por un terremoto de magnitud 9.9 [aldialogo.mx]
Η γκάφα της μετεωρολογικής υπηρεσίας που «πάγωσε» την Ιαπωνία: Προειδοποίησαν για σεισμό 9,9 Ρίχτερ [www.ekriti.gr]
Sistema de alerta temprana de Japón anunció por error un terremoto de magnitud 9.9 y desató el pánico: ¿qué pasó? [g5noticias.cl]
緊急地震速報“取り消し”　誤報防止の機能動作せず｜FNNプライムオンライン [www.fnn.jp]
緊急地震速報取り消し　のと鉄道一時運転停止　被災者「能登地震を思い出した」　気象庁、Ｍ９．９と過大推定 [www.hokkoku.co.jp]
Sistemi i paralajmërimit të hershëm i Japonisë lëshon alarm të rremë për një tërmet me magnitudë 9.9 ballë [javanews.al]
Japan False Earthquake Alert: Magnitude 9.9 Warning Withdrawn [www.calabriamagnifica.it]
Nhật Bản phát nhầm cảnh báo động đất 9,9 độ khiến cư dân náo loạn [kenh14.vn]
L'Agenzia meteorologica giapponese ha avvisato i cittadini dell'imminente arrivo del terremoto più forte di sempre, poi ha cancellato l'avviso e ha detto di essersi sbagliata [www.rivistastudio.com]
ドコモで緊急地震速報のエリアメール配信されず...原因は「システムの不具合」　「鳴らなかった」の声続々 [www.j-cast.com]
Clipe de groază în Japonia după o alertă de cutremur de 9,9 grade [www.stirilekanald.ro]
気象庁、緊急地震速報を取消　原因は不明 - 週刊アスキー [weekly.ascii.jp]
Tek Bir Olay Yüzünden Japonlar 7.300 Yıl Önce Neredeyse Yok Oluyormuş [onedio.com]
Japan Mistakenly Issues Magnitude 9.9 Quake Alert After Tremor Near Russia; Withdraws It Minutes Later [www.news18.com]
Japan's False Emergency Alert for a 9.9 Earthquake Wasn't a Cyberattack [gizmodo.com]