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The earthquake early warning system effectively provided timely alerts for the earthquakes in the Japan Sea off the Sanriku coast.

Public SafetyWeatherApr 20, 2026score 0.172 posts · 0 replies across 1 instances
The thread reports on a series of earthquakes in the Japan Sea off the Sanriku coast, with the first report indicating a magnitude 4.7 earthquake and the fifth report indicating a magnitude 5.0 earthquake. These events are significant due to their location and potential impact on the region.

Claims

The earthquake early warning system effectively provided timely alerts for the earthquakes in the Japan Sea off the Sanriku coast.
Parent: Public SafetyEntity: Earthquake Early Warning SystemImpact: positiveDate: Apr 20, 2026 - Apr 21, 2026Target: Effectiveness of the earthquake early warning system

Source posts

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■■緊急地震速報(第1報)■■ 三陸沖で地震 最大震度 2(推定) [詳細] 2026/04/20 17:30:07発生 M4.7 深さ 20km #earthquake
0 boosts · 0 favs · 0 replies · Apr 20, 2026
#earthquake
@[email protected]
■■緊急地震速報(第5報)■■ 三陸沖で地震 最大震度 2(推定) [詳細] 2026/04/20 18:49:42発生 M5.0 深さ 40km #earthquake
0 boosts · 0 favs · 0 replies · Apr 20, 2026
#earthquake
@[email protected]
■■緊急地震速報(第2報)■■ 福島県沖で地震 最大震度 2(推定) [詳細] 2026/04/21 13:50:49発生 M4.0 深さ 40km #earthquake
0 boosts · 0 favs · 0 replies · Apr 21, 2026
#earthquake
@[email protected]
■■緊急地震速報(第3報)■■ 福島県沖で地震 最大震度 2(推定) [詳細] 2026/04/21 13:50:49発生 M4.0 深さ 50km #earthquake
0 boosts · 0 favs · 0 replies · Apr 21, 2026
#earthquake
@[email protected]
■■緊急地震速報(最終報)■■ 福島県沖で地震 最大震度 2(推定) [詳細] 2026/04/21 13:50:49発生 M4.0 深さ 50km #earthquake
0 boosts · 0 favs · 0 replies · Apr 21, 2026
#earthquake