Communities along a 700-mile (1,127-km) stretch of Alaska’s southern coast ordered their residents to higher ground Wednesday after a powerful earthquake prompted a tsunami warning.

The tsunami warning was downgraded to an advisory after a 7.3 earthquake in Alaska.

The U.S. Tsunami Center said the warning was in effect from about 40 miles (64.4 km) southwest of Homer to Unimak Pass, a distance of about 700 miles.