The United States Geological Survey (USGS) reported that a 7.2-magnitude earthquake rocked the Alaska peninsula early on Sunday. A tsunami warning for nearby areas was initially issued, but was later lifted.

A tsunami warning that had been issued by the U.S. Tsunami Warning System for South Alaska and the Alaska Peninsula’s coastal regions has been withdrawn.

USGS revised the magnitude of the earthquake down from an initial reading of 7.4, and it revised the depth of the quake to 32.6 km (20.3 miles) from an initial 9.3 km.

There were no immediate reports of damage or casualties although a few Twitter accounts posted videos of tsunami sirens and strong tremors being felt.