Tsunami warnings follow 8.8 magnitude quake in Russia
A major 8.8 magnitude earthquake struck off the coast of Russia’s Kamchatka Peninsula on 30 July, triggering tsunami warnings and evacuations across the Pacific.
According to Reuters, the quake hit near Petropavlovsk-Kamchatsky and was the strongest to affect the region since 1952.
The earthquake caused injuries and building damage in Russia, with tsunami waves reaching as far as French Polynesia, Hawaii and Japan.
Tsunami warnings were issued across multiple countries, including the Galapagos Islands, before being downgraded in some regions.
The quake was followed by an eruption of the Klyuchevskoy volcano, which began spewing lava and gas later in the day.
Evacuations and advisories in Japan, Hawaii and South America
Reuters reported that tsunami warnings were triggered across the Pacific Ocean, with waves hitting several countries and territories.
Japan issued evacuation orders for parts of its Pacific coastline, including the Fukushima nuclear plant, although no damage was reported.
In Hawaii, waves up to 1.7 metres were recorded, and flights from Honolulu were briefly disrupted before services resumed in the evening.
Authorities in Ecuador’s Galapagos Islands ordered precautionary evacuations, moving people to safer areas inland.
Wave activity also reached coastal regions of California and British Columbia, but tsunami advisories for these locations were later withdrawn.
Russian regions affected by quake and volcanic activity
The earthquake’s epicentre was located around 119 km east-southeast of Petropavlovsk-Kamchatsky, according to the U.S. Geological Survey.
Russia’s RIA news agency reported tsunami waves up to 5 metres in Severo-Kurilsk, causing partial flooding and damage to port facilities.
The country’s emergency ministry said waves swept vessels from moorings and inundated parts of a fish processing plant.
The Russian Academy of Sciences said the Klyuchevskoy volcano, located around 450 km from the quake’s epicentre, began erupting shortly after the quake.
Its United Geophysical Service reported: “A descent of burning hot lava is observed on the western slope.
“Powerful glow above the volcano, explosions.”
Pacific islands experience varying wave impacts
In French Polynesia, authorities warned residents of the Marquesas Islands to evacuate to higher ground.
Reuters reported that wave heights of up to 2.5 metres were expected, although actual waves were later said to be smaller than first predicted.
Local authorities on Nuku Hiva recorded the arrival of initial waves, with several more expected.
Wave heights in other parts of French Polynesia were forecast to remain under 30 cm, not requiring further evacuation.
Officials noted the varying risk due to differences in island topography, with the Marquesas having high elevations, unlike the low-lying atolls elsewhere in the region.
Scientific explanation and emergency response
Scientists said the quake occurred along a megathrust fault where the Pacific Plate slides beneath the North American Plate.
According to geological researchers cited by Reuters, this region is prone to major seismic events due to its location on the Pacific Ring of Fire.
The German Research Center for Geosciences reported a subsequent 6.07 magnitude quake in the nearby Kuril Islands.
Video from Kamchatka’s regional health ministry showed medics continuing surgery during the quake, holding equipment and the patient steady in a shaking operating theatre.
Kremlin spokesperson Dmitry Peskov said: “There had been no casualties in Russia,” and credited this to resilient infrastructure and effective alert systems.
Russia’s Kamchatka earthquake triggers tsunami alerts across Pacific: Summary
A magnitude 8.8 earthquake struck off the coast of Kamchatka, Russia, on 30 July 2025.
The quake was centred near Petropavlovsk-Kamchatsky and was the strongest recorded in the region since 1952.
Reuters reported injuries and structural damage in the affected Russian areas.
Tsunami warnings were issued in Japan, Hawaii, French Polynesia, and the Galapagos Islands.
Severo-Kurilsk experienced tsunami waves of up to 5 metres, according to Russia’s RIA news agency.
Klyuchevskoy volcano erupted hours after the quake, releasing lava and ash.
Hawaii recorded waves up to 1.7 metres, and Japan reported a maximum of 1.3 metres.
French Polynesia’s Marquesas Islands saw smaller waves than forecast but evacuations were still issued.
Waves also reached California and British Columbia but advisories were later lifted.
Scientists linked the quake to tectonic movement on the Pacific Ring of Fire.