TSUNAMI WARNING NOTICE:
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The quake has prompted a major tsunami warning
The quake struck 157 miles (256km) south-east of Chiniak, Alaska, at 9.31am GMT (12.31am local time) on Tuesday.
People on Kodiak Island have been urged to stay away from the coast after the quake struck just 175 miles away.
The quake prompted a tsunami warning for parts of Alaska and Canada and a tsunami watch for the entire US west coast, the US Tsunami Warning System said.
The USGS has since downgraded the quake to a magnitude of 7.9.
People are being alerted to the danger by text messages and those in affected areas have been urged to seek high ground.
The NWS Pacific Tsunami Warning Center said that, based on the preliminary earthquake parameters, "widespread hazardous tsunami waves were possible".
People in Kodiak were woken up by the tremors shortly after midnight and tsunami sirens can be heard across the island.
One Twitter user has warned that the roads are "snowy and icy" meaning potential difficulties for thoise trying to flee to higher ground.
Helicopters are flying over the island as millions of people across the west coast of North America brace for tsunami waves to hit the coast.
Reports on social media suggest the tremors were felt as far south as Seatle and Vancouver.
Anchorage, Alaska's largest city, has issued an extreme warning, saying there is "extraordinary threat to life or property".
In a warning for Alaska and British Columbia, Anchorage Office of Emergency Management said: “If you are located in this coastal area, move inland to higher ground. Tsunami warnings mean that a tsunami with significant inundation is possible or is already occurring.”
Shaun Dyess said: “I’m here in Anchorage Alaska. It was shaking for along time. Hope no one got hurt.”
The quake had a depth of around six miles, according to USGS.
It is already expected to be one of the largest quakes in US history.
Details on damage and casualties have not yet emerged.
Alaska is situated on the Ring of Fire, a huge area in the basin of the Pacific Ocean where earthquakes and volcanic eruptions frequently occur.
Only four earthquakes with a greater magnitude have ever been recorded in the US, all of which were in Alaska and caused a tsunami.
The most powerful came on 27 March 1964, when a 9.2 magnitude quake caused ground fissures, collapsed buildings and killed 139 people.
The quake comes just hours after a 6.1-magnitude earthquake struck off the coast of Java, Indonesia, sending people in the capital running into the streets.
Officials in Japan are monitoring the situation but have not yet issued any tsunami warnings.
https://www.express.co.uk/news/worl...canada-ring-of-fire-big-one-California-hawaii
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The quake has prompted a major tsunami warning
The quake struck 157 miles (256km) south-east of Chiniak, Alaska, at 9.31am GMT (12.31am local time) on Tuesday.
People on Kodiak Island have been urged to stay away from the coast after the quake struck just 175 miles away.
The quake prompted a tsunami warning for parts of Alaska and Canada and a tsunami watch for the entire US west coast, the US Tsunami Warning System said.
The USGS has since downgraded the quake to a magnitude of 7.9.

The NWS Pacific Tsunami Warning Center said that, based on the preliminary earthquake parameters, "widespread hazardous tsunami waves were possible".
People in Kodiak were woken up by the tremors shortly after midnight and tsunami sirens can be heard across the island.
One Twitter user has warned that the roads are "snowy and icy" meaning potential difficulties for thoise trying to flee to higher ground.
Helicopters are flying over the island as millions of people across the west coast of North America brace for tsunami waves to hit the coast.
Reports on social media suggest the tremors were felt as far south as Seatle and Vancouver.
Anchorage, Alaska's largest city, has issued an extreme warning, saying there is "extraordinary threat to life or property".
In a warning for Alaska and British Columbia, Anchorage Office of Emergency Management said: “If you are located in this coastal area, move inland to higher ground. Tsunami warnings mean that a tsunami with significant inundation is possible or is already occurring.”
Shaun Dyess said: “I’m here in Anchorage Alaska. It was shaking for along time. Hope no one got hurt.”
The quake had a depth of around six miles, according to USGS.

It is already expected to be one of the largest quakes in US history.
Details on damage and casualties have not yet emerged.
Alaska is situated on the Ring of Fire, a huge area in the basin of the Pacific Ocean where earthquakes and volcanic eruptions frequently occur.
Only four earthquakes with a greater magnitude have ever been recorded in the US, all of which were in Alaska and caused a tsunami.
The most powerful came on 27 March 1964, when a 9.2 magnitude quake caused ground fissures, collapsed buildings and killed 139 people.
The quake comes just hours after a 6.1-magnitude earthquake struck off the coast of Java, Indonesia, sending people in the capital running into the streets.
Officials in Japan are monitoring the situation but have not yet issued any tsunami warnings.
https://www.express.co.uk/news/worl...canada-ring-of-fire-big-one-California-hawaii
.
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