Why the Pacific tsunami was smaller than expected – a geologist explains

The earthquake near the east coast of the Kamchatka peninsula in Russia on July 30 2025 generated tsunami waves that have reached Hawaii and coastal areas of the US mainland. The earthquake’s magnitude of 8.8 is significant, potentially making it one of the largest quakes ever recorded.

Countries around much of the Pacific, including in east Asia, North and South America, issued alerts and in some cases evacuation orders in anticipation of potentially devastating waves. Waves of up to four…

© La Conversation - mercredi 30 juillet 2025