Event Overview

A powerful magnitude 8.8 earthquake struck off Kamchatka early on July 30, 2025, initially estimated at 8.0 then upgraded twice to 8.8 by the USGS Al Jazeera+15Anadolu Ajansı+15AP News+15.

The epicenter was located approximately 119–136 km east‑southeast of Petropavlovsk‑Kamchatsky, at a shallow depth between 19 and 20.7 km Reddit+14The Week+14Anadolu Ajansı+14.

The quake occurred along the Kuril–Kamchatka arc, one of the Pacific Ring of Fire’s most seismically active zones Al Jazeera.

Historic Significance

This is the strongest earthquake in the region since 1952, when a magnitude ~9.0 event off Severo‑Kurilsk produced 9 m tsunamis (killing over 2,300 people) WTOP News+15Wikipedia+15The Wall Street Journal+15.

Globally, it’s among the top ten most powerful recorded earthquakes, comparable to the 2011 Tōhoku quake (M9.0) The WeekSky News.

Local Impacts (Kamchatka & Kuril Islands)

Severo‑Kurilsk on Paramushir Island saw heavy tsunami flooding; residents were evacuated and around 2,000 people moved to safety https://www.newschannel6now.com.

Tsunami waves up to 4 m (≈13 ft) were observed locally, significantly impacting ports and coastal infrastructure The Wall Street Journal.

In Petropavlovsk‑Kamchatsky, houses shook, mirrors broke, cars swayed, cabinets fell, and mobile and power outages occurred. Several minor injuries reported; a kindergarten wall collapsed—fortunately no casualties El País+10The Week+10Sky News+10.

Evacuations were ordered on nearby Sakhalin Island and emergency services surged into action https://www.29news.com+2The Week+2News on Air+2.

Tsunami Alerts & Wave Recording

Japan

Over 900,000 to 1.9 million people in multiple prefectures were ordered to evacuate (reports vary) ElHuffPost.

First tsunami waves of 30 cm to 50 cm (≈1–1.6 ft) reached Ishinomaki, Nemuro, and Tokachi on Hokkaido; though forecasts had warned that waves up to 1 m to 3 m might arrive in coastal prefectures https://www.29news.com+1The Week+1.

Fukushima Daiichi nuclear plant evacuated ~4,000 staff as a precaution; no damage reported https://www.newschannel6now.com+1News.com.au+1.

United States (Hawaii, Alaska & West Coast)

Hawaii issued statewide tsunami warnings and evacuations; 4-foot waves (~1.2 m) hit Oʻahu and Maui. Authorities opened emergency transport corridors and halted flights and port operations, though no major damage reported The Wall Street JournalWTOP NewsnortheastNOW.

In Alaska, small waves under 30 cm were recorded at Adak and Amchitka. A warning was issued for the Aleutian Islands and a watch or advisory extended to Alaska’s Panhandle and the U.S. West Coast (California, Oregon, Washington) WTOP News.

In California, local forecasts anticipated waves up to 1.7 m (≈5.7 ft) in places like Crescent City; advisories urged avoiding coastal zones until the all-clear AP News.

Other Pacific Regions

Alerts, advisories, or warnings were issued in Chile (coasts from Arica to Los Lagos), Ecuador, Peru, Mexico, Taiwan, Philippines, Indonesia, the Solomon Islands, and New Zealand. Most reported minor to no wave impact to date El País.

Chile declared a state of precaution for key coastal regions and suspended classes as a preventive measure El País.

India announced support advisory for Indian nationals in the U.S. West Coast and Hawaii, activated emergency helpline, affirmed nuclear facilities were unaffected, and no fatalities confirmed yet The Economic Times.

Aftershocks & Seismic Context

Significant aftershocks followed: magnitudes 6.9 and 6.3, located 131–147 km southeast of Petropavlovsk, at ~10 km depth Al Jazeera.

Regional geophysical services expect further aftershocks up to magnitude 7.5 over at least the next month Sky News.

This event followed earlier strong tremors in July, including a magnitude‑7.4 quake — now considered a foreshock to this main event Al Jazeera+1India Today+1.