The strongest earthquake so far in 2025 was the 2025 Kamchatka earthquake, which had a moment magnitude (Mw) of 8.8. It occurred on July 29, 2025, off the eastern coast of the Kamchatka Peninsula in Russia. This earthquake was classified as IX ("Violent") on the Modified Mercalli Intensity scale and was the most powerful recorded worldwide since the 2011 TÅhoku earthquake. It was among the strongest ever recorded by seismometers, causing moderate damage and multiple injuries in Kamchatka Krai and Sakhalin Oblast, with a tsunami that was weaker than expected.
For earthquakes specifically in September 2025, notable strong events include:
- September 18: A magnitude 7.8 earthquake offshore Kamchatka with an intensity of VIII ("Severe")
- September 13: A magnitude 7.4 earthquake offshore Kamchatka intensity VI ("Strong")
- Several other earthquakes with magnitudes ranging from about 5.5 to 6.4 globally.
In summary, the strongest earthquake in 2025 was the magnitude 8.8 Kamchatka earthquake, and there were other strong earthquakes with magnitudes around 7 to 7.8 in September 2025.
