Japan issued a 9.9 magnitude earthquake alert, but ground didn't shake: What happened

An "alert" indicating a massive magnitude-9.9 earthquake sent shockwaves of fear across Japan on Friday afternoon. Just eight ...

Japan’s False Emergency Alert for a 9.9 Earthquake Wasn’t a Cyberattack

The false warning of a 9.9 earthquake in Japan wasn’t the result of a cyberattack, according to the New York Times, citing ...

Japan Mistakenly Issues Warning for Strongest Ever Earthquake

Officials on Friday withdrew an alert sent when they believed a 9.9-magnitude earthquake had taken place. In the end, the ...

Reflections on the Earthquake Early Warning (M9.9 False Alarm) for the M6.9 Earthquake near the Kamchatka Peninsula

Regarding the M6.9 earthquake that occurred near the Kamchatka Peninsula on October 16, the Japan Meteorological Agency (JMA) ...
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Japan Issues Magnitude 9.9 Earthquake Warning, Then Quickly Cancels It

The JMA issued an emergency warning after initial automated data suggested a magnitude 9.9 earthquake near the Kuril Islands.

[M9.9 was a false alarm] Why was the Earthquake Early Warning wrong? The cause revealed by the Japan Meteorological Agency and 5 things you should know

Hello! This is "Today's Discovery Note" 💙"A magnitude 9.9 massive earthquake has occurred!?"On October 16, 2026, such an Earthquake Early Warning was issued, becoming a major topic of ...