Overview

• Seismic agencies reported magnitudes ranging from 7.2 to 7.8 for the undersea event at roughly 123 km depth east of Petropavlovsk‑Kamchatsky.
• Regional authorities and NOAA issued tsunami alerts with site‑specific forecasts up to 1.5 meters at Mys Lopatka before canceling advisories after minimal coastal impact.
• The Kuril Islands briefly activated tsunami precautions, observed a wave up to 15 centimeters in South Kuril, and later lifted the warning.
• Inspections reported no structural destruction, and emergency services stayed in a state of heightened readiness as public advisories remained active.
• USGS recorded four notable aftershocks around magnitude 5–6, while regional officials counted 16 in a day, reflecting sustained elevated seismicity since the July 30 main shock.