A significant earthquake rocked Anchorage, Alaska at 8:29 a.m. local time today (Nov. 30). The U.S. Geological Survey (USGS) initially reported that the quake had a magnitude of 6.6, but later updated that to 7.0. The epicenter was 8 miles (13 kilometers) north of Anchorage, and a tsunami warning has been issued for the region.

[Update, 2:10 p.m. EST: The tsunami alert for Alaska was canceled at 9:59 a.m. local Anchorage time, according to a tweet posted by the the U.S. National Tsunami Warning Center on Twitter.]

Locals have shared images and video on social media that appear to show the quake and its aftereffects, however, has not independently confirmed their authenticity.

pic.twitter.com/tvFMtpxun3

Reporter Cassie Schirm shared this image of the damage to the KTVA newsroom.

KTVA’s newsroom felt the blow of the earthquake this morning. #anchorage #alaska #earthquake #weather pic.twitter.com/d1SaxriGw9

Blair Braverman, a dogsled racer and author, shared images of traffic as people moved East following the tusnami warning.

Traffic pic.twitter.com/AGdsA78fBs

Stoplights are out, so drivers are treating them like 4-way stops. Slow but steady. No one on the road seems to be panicking anymore, but we’re still all heading to high ground. Wish we had snacks. #earthquake pic.twitter.com/MHsCxIDfMU

USGS reported several aftershocks in the region, which Braverman and others in the area also reported feeling.

Earthquakes, as has previously reported, occur when pressure built up along fault lines in the Earth’s crust gets released, and the crust slips along the fault, moving the Earth above. Tsunamis can sometimes result when that movement pushes on ocean water, causing it to shift toward land. Earthquakes are somewhat common in the Anchorage area, and this is not the largest earthquake it’s experienced in living memory. Anchorage saw an enormous 9.2 magnitude earthquake back in 1964.

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