Back-to-back earthquakes, measuring 7.0 and 5.8, rocked buildings and shattered roads in Anchorage on Friday, sending people running into the streets and briefly triggering a warning to residents in Kodiak to flee to higher ground for fear of a tsunami. The warning was lifted a short time later. There were no immediate reports of any deaths or serious injuries.

Alaska averages 40,000 earthquakes per year, with more large quakes than the 49 other states combined. Southern Alaska has a high risk of earthquakes because of tectonic plates sliding past each other under the region

'It was anarchy': back-to-back earthquakes rock Anchorage