Tokyo, 30 July

One of the world's strongest earthquakes struck Russia's Far East early Wednesday, an 8.8-magnitude temblor that caused a tsunami in the northern Pacific region and prompted warnings for Alaska, Hawaii and other coasts south toward New Zealand.

Several locations advised evacuations, but no major injuries have been reported.

Cars jammed streets and highways in Honolulu as the tsunami alerts coincided with the Tuesday afternoon rush-hour. Warning sirens blared as people moved to higher ground. Hawaii schools cancelled after-school and evening activities.

A tsunami of 50 centimeters (1.6 feet) was detected at the Ishinomaki port in northern Japan, according to the Japan Meteorological Agency. That was the highest measurement so far among several locations around northern Japan.

The Russian areas nearest the quake's epicentre on the Kamchatka Peninsula reported damage and evacuations, but no serious injuries.

Hawaii and Oregon warn residents of potential damage

The Pacific Tsunami Warning Center said a tsunami had been generated by the quake that could cause damage along the coastlines of all the Hawaiian islands.

“Urgent action should be taken to protect lives and property,” the warning stated. The first waves were expected around 7pm Tuesday local time.

The Oregon Department of Emergency Management said on Facebook that small tsunami waves were expected along the coast starting around 11.40 pm local time, with wave heights between 1 to 2 feet (30 to 60 centimeters). It urged people to stay away from beaches, harbors and marinas and to remain in a safe location away from the coast until the advisory is lifted.

Much of the West Coast spanning Canada's British Columbia province, Washington state and California were also under a tsunami advisory.

Russian regions report quake damage

The quake at 8.25 am Japan time had a preliminary magnitude of 8.0, Japan and US seismologists said. The US Geological Survey later updated its measurement to 8.8 magnitude and the USGS said the quake occurred at a depth of 20.7 kilometers.

The quake was centered about 119 kilometers 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 were recorded.

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.

The quake caused damage to buildings and cars swayed in the streets in Petropavlovsk-Kamchatsky, which also had power outages and mobile phone service failures. 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.

Among the world's strongest recorded quakes

The earthquake appeared to be the strongest anywhere in the world since the March 2011 earthquake off northeast Japan that was 9.0 magnitude and 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. Ferries connecting Hokkaido and Aomori on the northern tip of Japan's Honshu island were suspended, as well as those connecting Tokyo and nearby islands, and some local train operations were suspended or delayed, according to operators. Sendai airport temporarily closed its runway.

Japanese nuclear power plants reported no abnormalities. Tokyo Electric Power Company Holdings, which operates the tsunami-hit Fukushima Daiichi nuclear power plant, said about 4,000 workers are taking shelter on higher ground at the plant complex while monitoring remotely to ensure plant safety.

Philippine authorities warned provinces and towns along the archipelago's eastern coast facing the Pacific of possible tsunami waves of less than 1 meter and advised people to stay away from the beach and coastal areas.

New Zealand authorities issued warnings of “strong and unusual currents and unpredictable surges” along coastlines throughout the country. The government emergency management agency said people should move out of the water, off beaches and shore areas, and away from harbors, marinas, rivers and estuaries.