Powerful Magnitude 8.8 Kamchatka Earthquake Triggers Widespread Tsunami Warnings

July 30, 2025 – 9:22 AM (PHT)

A powerful submarine earthquake—estimated at magnitude 8.7 to 8.8—struck near Russia’s Kamchatka Peninsula at a depth of approximately 18–20 km, about 120–130 km east‑southeast of Petropavlovsk‑Kamchatsky. The quake ranks among the strongest in recent decades in the region.

Origin of the Tsunami

The earthquake occurred in the Kuril–Kamchatka subduction zone, where the Pacific Plate dives beneath the Okhotsk Plate. This tectonic boundary has historically produced major tsunamigenic earthquakes, including events in 1952 and 1841 (Kuril Islands, 1918)

Philippine Tsunami Advisory

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) issued an advisory for Pacific‑facing coastal provinces. Expected tsunami waves are under one metre in height, with arrival between 1:20 PM and 2:40 PM local time. PHIVOLCS cautioned that initial waves may not be the largest and that tsunami activity could persist for several hours

Provinces potentially affected:

• Luzon: Batanes, Cagayan, Isabela, Aurora, Quezon, Camarines Norte, Camarines Sur, Albay, Sorsogon, Catanduanes

• Visayas: Northern Samar, Eastern Samar, Leyte, Southern Leyte

• Mindanao: Dinagat Islands, Surigao del Norte, Surigao del Sur, Davao del Norte, Davao Oriental, Davao Occidental, Davao del Sur, Davao de Oro

Countries and Territories That Activated Tsunami Warnings

Following the quake, tsunami warnings, watches, or advisories were triggered across the Pacific and adjacent regions. Those affected include:

• Russia (Kamchatka region and Kuril Islands)

• Japan (especially Hokkaido and multiple coastal prefectures; major evacuations including over 900,000 residents)

• United States: Hawaii (state of emergency, evacuations on Oahu), Alaska (Aleutian Islands), U.S. West Coast (California, Oregon, Washington under watch or advisory), Guam and American Samoa under advisory

• Canada (British Columbia coastline)

• Philippines

• Taiwan

• Indonesia (including Papua and North Maluku regions)

• New Zealand (cautioned coastal residents, especially in North Island cities like Auckland and Wellington)

• Mexico, Ecuador (including Galápagos), Chile, Peru

• Australia (added to advisory list; potential wave heights up to 1 metre though no mainland threat confirmed)

• Additional Pacific island territories including Guam, Saipan, Kiribati, Midway, Palmyra, Johnstone, Jarvis, Solomon Islands, Samoa and others

Reported wave heights varied widely—from under half a metre in some areas to as much as 3–4 metres in parts of Kamchatka and coastal Japan. In Kamchatka’s Severo-Kurilsk, local flooding and structural damage occurred, prompting evacuations; several injuries were reported