2025 Kamchatka tsunami kept the Pacific ringing for over ten hours

A magnitude 8.8 earthquake off Russia's Kamchatka Peninsula on July 29, 2025 triggered a Pacific-wide tsunami that kept the ocean oscillating for more than ten hours. Waves reached about 19 meters on Shumshu in the Kuril Islands. The rhythm of these oscillations could improve tsunami warning systems.

• Magnitude 8.8 quake was the largest on Earth since 2011
• Tsunami spread across the Pacific, with warnings from Japan to Chile
• Waves reached about 19 meters on Shumshu in the Kuril Islands
• Ocean oscillations lasted over ten hours and may aid forecasting