Overview

• The magnitude 8.8 earthquake struck at a depth of 20.7 kilometers about 119 kilometers east-southeast of Petropavlovsk-Kamchatsky early on July 30.
• Ports on the Kamchatka Peninsula and the Kuril Islands flooded as residents evacuated to higher ground, but regional authorities report no serious injuries.
• Multiple aftershocks, including a 6.9-magnitude tremor, continue to be recorded even as their frequency and strength taper off.
• Tsunami waves up to four meters inundated the Kuril Islands, and minor sea-level rises were logged in Alaska’s Amchitka and Adak communities and along Hokkaido’s coast.
• Maritime and coastal agencies remain on heightened alert and are monitoring sensors for any repeat surges or unusual sea-level changes.