Tsunami waves have reached the US west coast after a 8.8 magnitude earthquake off Russia's eastern coast triggered warnings across the Pacific - here's a list of the areas affected
The earthquake, which hit near Kamchatka Peninsula at about 11:25am local time (00:25 BST) on Wednesday, is one of the most powerful ever recorded
Residents have been describing the moment the earthquake hit, with one telling the BBC: "Chaos broke out, furniture started falling before our eyes"
Tsunami warnings have since been downgraded in Japan, Russia and Hawaii - almost two million people had been told to evacuate in Japan
Meanwhile, Russian authorities have evacuated the town of Severo-Kurilsk after 4m (13ft) waves flooded the port - BBC Verify's been analysing footage from the area
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We've got more on the tsunami in Hokkaido. Estimates put it at about 30cm (12in), and it hit Nemuro, a port city in the north-eastern part of Hokkaido.
Japanese authorities warned earlier that the subsequent waves could be higher.
The tsunami has hit the northern part of Japan's Hokkaido prefecture, local broadcaster NHK says.
Japan's Prime Minister Shigeru Ishiba says authorities are "working to assess the situation", adding that any relief efforts will "put human lives first".
There is no confirmation of any damage so far, he says, urging residents under evacuation orders to seek high ground and stay away from the coasts.
Image source, ReutersJapan's Prime Minister Shigeru Ishiba
Three-metre (10 ft) tsunami waves could hit Ecuador following the tremor, according to the US Tsunami warning center.
As we just reported, tsunami warnings have been issued for several countries along with Pacific Ocean coastlines.
Officials in Hawaii have ordered an "immediate evacuation" of large parts the island Oahu, including the state capital Honolulu.
"Take Action! Destructive tsunami waves are expected," Honolulu's Department of Emergency Management says in alerts on social media.
Image source, ReutersJapan has also urged residents in affected areas to evacuate immediately. Its evacuation warnings now span hundreds of kilometres along a wide swathe of its coastal regions.
"Escape to a higher, safe location right away.The time of the tsunami's arrival is just an estimate. Waves could actually arrive sooner or later. Continue to evacuate as long as the warning is in place," authorities say in an alert.
Meterologists have forecasted that tsunami waves could reach as high as 3-4m.
The 8.7 magnitude earthquake struck about 78 miles (126km) from Petropavlovsk-Kamchatsky, Russia, at a depth of 18 kilometres, according to the United States Geological Survey.
The tremor generated a tsunami of 3-4 metres in Kamchatka, according to Sergei Lebedev, the regional minister for emergency situations.
There were no injuries, but a kindergarten was damaged, according to preliminary information, Lebedev added.
"Today's earthquake was serious and the strongest in decades of tremors," Kamchatka Governor Vladimir Solodov said in a video posted on the Telegram messaging app.
Here's a list of places for which tsunami alerts have been issued:
A massive 8.7 magnitude earthquake has struck off Russia's fareastern coast, triggering tsunami warnings across parts of Russia, Japan and United States.
Follow us for more developments on this breaking story.