The 2025 Kamchatka tsunami kept the Pacific ringing for more than ten hours. Its rhythm could help tsunami warnings
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…
On July 29, 2025, a powerful earthquake struck the Kamchatka Peninsula in Russia, registering a magnitude of 8.8, making it the largest seismic event on Earth since the 2011 Tohoku earthquake. The tremor generated a tsunami that rapidly spread across the Pacific Ocean, prompting tsunami warnings from Japan to Chile. In Shumshu, one of the Kuril Islands, the waves reached a height of approximately 19 meters (62 feet).
The research team, led by Amin Rashidi, investigated how much of the ocean's recorded data could be attributed to the earthquake alone. Utilizing a network of buoys, known as DART, they compared the simulated tsunami waves to the actual readings. The simulation accurately predicted the arrival times and heights of the tsunami waves, agreeing within a minute for 6 buoys and within 6 centimeters for wave heights.
Along the coastlines, the simulation matched 21 reported wave heights within approximately 16%. This study highlights that the earthquake alone is responsible for the tsunami and reveals that the ocean continues to oscillate at a specific frequency for over 10 hours post-tsunami. This phenomenon, known as ringing, could potentially serve as an indicator for early tsunami warnings, giving warning centers valuable insight into where the waves may intensify.
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