The 2025 Kamchatka tsunami kept the Pacific ringing for more than ten hours. Its rhythm could help tsunami warnings

AI Summary

A magnitude 8.8 earthquake off Russia's Kamchatka Peninsula in July 2025 generated a tsunami that spread across the Pacific and produced waves reaching about 19 meters on Shumshu in the Kuril Islands. Researchers say the tsunami's oscillations continued for more than ten hours and may help improve future warning systems.

On July 29, 2025, at 23:24 Universal Time, a long stretch of seafloor off Russia's Kamchatka Peninsula was thrust upward. The magnitude 8.8 earthquake was the largest on Earth since the Tohoku earthquake of 2011, according to the U.S. Geological Survey, and within minutes a tsunami was spreading across the Pacific. Warnings went out from Japan to Chile. On Shumshu, in the Kuril Islands, the water splashed up to about 19 meters (62 feet) high.