SAN FRANCISCO, Nov. 30 (Xinhua) -- A tsunami warning issued after a major magnitude earthquake hits Anchorage, Alaska Friday morning has been canceled, the U.S. National Weather Service said.
"The Tsunami Warning in Alaska that accompanied this morning's M7.0 earthquake has been canceled," the service tweeted.
The areas in and around Anchorage have experienced at least nine earthquakes of magnitude 3 or higher since Friday morning's earthquake about eight miles (12.8 km) north of Anchorage, it added.
The U.S. National Tsunami Warning Center also said in a tweeted post that no tsunami has been observed.
A tsunami alert was issued earlier for Cook Inlet and the southern Kenai Peninsula in Alaska.
The quake, which was initially reported with a magnitude of 6.7, was updated to 7.0, jolting 11 km north of Anchorage at 17:29:28 GMT on Friday, according to the U.S. Geological Survey.
There was no report of injuries or casualties from the quake, but video footage posted on social media showed big cracks were seen on some roads and windows smashed in some buildings.
One of the posts showed ceiling tiles were falling at a high school in Anchorage, a major city in Alaska. Electrical service was disrupted in some areas in Anchorage.
Alaska averages 40,000 earthquakes every year, with more large quakes than the other 49 states combined across the country.
