Overview

• The USGS reported a magnitude 7.8 earthquake at a depth of about 10 km, roughly 128 km east of Petropavlovsk-Kamchatsky on Russia’s Kamchatka Peninsula.
• Tsunami advisories were issued for Alaska’s western Aleutians and later canceled, and the Pacific Tsunami Warning Center issued an all clear for Hawaii; no alerts were posted for the U.S. West Coast.
• Kamchatka authorities issued local tsunami alerts that were subsequently lifted as Governor Vladimir Solodov placed emergency services on high alert and said there were no immediate reports of damage.
• Multiple aftershocks followed, including preliminary magnitudes of 5.8 and 5.4 recorded shortly after the main event.
• USGS identified the quake as the largest aftershock of the July 29 magnitude‑8.8 event on the Kuril–Kamchatka subduction zone, while Russian seismic services initially reported lower magnitudes near 7.2–7.4.