8.8-magnitude quake sends small tsunami into coasts of Russia, Japan and Alaska

Irish Examiner

6 days ago

One of the strongest earthquakes ever recorded has struck Russia's far east, an 8.8-magnitude tremor that caused tsunami waves in Japan and Alaska and prompted warnings for Hawaii, North and Central America and the Pacific islands south toward New Zealand.
Ports on the Kamchatka Peninsula in Russia near the quake's epicentre were flooded as residents fled inland, and white waves washed up to the shore in northern Japan.
Cars jammed streets and major roads in Honolulu, with standstill traffic even in areas away from the shoreline.
Due to a massive earthquake that occurred in the Pacific Ocean, a Tsunami Warning is in effect for those living in Hawaii. A Tsunami Watch is in effect for Alaska and the Pacific Coast of the United States. Japan is also in the way. Please visit https://t.co/wdFzeu1I0h for the… — Donald J. Trump (@realDonaldTrump) July 30, 2025
People were advised to move to higher ground around much of the Pacific and warned that the potential danger may last for more than a day.
Most places where tsunami waves have already washed ashore have reported no significant damage so far.
A tsunami height of 10-13ft was recorded in Kamchatka, 2ft on Japan's northern island of Hokkaido, and up to 1.4 feet above tide levels were observed in Alaska's Aleutian Islands.
The impact of the tsunami could last for hours or perhaps more than a day, according to Dave Snider, tsunami warning coordinator with the National Tsunami Warning Centre in Alaska.
Beaches were evacuated in Shirahama, Wakayama prefecture, western Japan (Kyodo News via AP)
'A tsunami is not just one wave,' he said.
'It's a series of powerful waves over a long period of time. Tsunamis cross the ocean at hundreds of miles an hour – as fast as a jet aeroplane – in deep water.
'But when they get close to the shore, they slow down and start to pile up. And that's where that inundation problem becomes a little bit more possible there.
'In this case, because of the Earth basically sending out these huge ripples of water across the ocean, they're going to be moving back and forth for quite a while,' which is why some communities may feel effects longer, he added.
Hawaii governor Josh Green said data from Midway Atoll, which is between Japan and Hawaii, measured waves from peak to trough of 6ft.
He said waves hitting Hawaii could be bigger or smaller and it is too early to tell how large they would be. A tsunami of that size would be akin to a 3ft wave riding on top of surf, he said.
A kindergarten was damaged by the quake in Petropavlovsk-Kamchatsky, Russia (Russian Emergency Ministry Press Service via AP)
'This is a longitudinal wave with great force driving through the shoreline and into land,' he said at a news conference.
Mr Green said Black Hawk helicopters have been activated and high-water vehicles were ready to go in case authorities need to rescue people. 'But please do not put yourself in harm's way,' he said.
The quake at 8.25am Japan time (12.25am BST) had a preliminary magnitude of 8.0, Japan and US seismologists said. The US Geological Survey later updated its strength to 8.8 magnitude and the USGS said the quake occurred at a depth of 13 miles.
The quake was centred about 74 miles east-southeast from the Russian city of Petropavlovsk-Kamchatsky, which has a population of 180,000, on the Kamchatka Peninsula. Multiple aftershocks as strong as 6.9 magnitude followed.
The first tsunami wave hit the coastal area of Severo-Kurilsk, the main settlement on Russia's Kuril Islands in the Pacific, according to the local governor Valery Limarenko. He said residents were safe and staying on high ground until the threat of a repeat wave was gone.
Temporary evacuation safety points are open across the state. If you are in an Evacuation Zone, please head to higher ground. These centers are available to provide a safe place to ride out the impact. The first wave is expected to arrive at approximately 7:10pm HST.… — HawaiiRedCross (@HawaiiRedCross) July 30, 2025
About 2,700 people were evacuated to safe locations on the Kuril Islands. Buildings were damaged and cars swayed in the streets in Petropavlovsk-Kamchatsky. Russian news agencies quoting the regional Health Ministry saying several people sought medical help in Kamchatka after the earthquake, but no serious injuries were reported.
The earthquake appears to be the strongest anywhere in the world since the 9.0 magnitude earthquake off north-eastern Japan in March 2011 that caused a massive tsunami that set off meltdowns at a nuclear power plant. Only a few stronger earthquakes have ever been measured around the world.
The tsunami alert disrupted transportation in Japan, with ferries, trains and airports in the affected area suspending or delaying some operations.
A tsunami of 2ft was recorded at Hamanaka town in Hokkaido and Kuji port in Iwate, according to the Japan Meteorological Agency. Several areas reported smaller waves including 8in in Tokyo Bay five hours after the quake.
In Japan's northern coastal town of Matsushima, dozens of residents took refuge at an evacuation centre, where water bottles were distributed and an air conditioner was running. One person told NHK she came to the facility without hesitation based on the lesson from the 2011 tsunami.
Japanese nuclear power stations have reported no abnormalities.
The operator of the Fukushima Daiichi plant damaged by the 2011 tsunami said about 4,000 workers are taking shelter on higher ground at the plant complex while monitoring remotely to ensure plant safety.