A powerful 7.3-magnitude earthquake struck off the southern coast of Alaska on Wednesday, according to the United States Geological Survey (USGS).
The quake occurred at 12:37 p.m. local time (2037 GMT), with its epicenter located about 54 miles (87 kilometers) south of Sand Point, a remote town on Popof Island in the Aleutians East Borough.

The earthquake had a depth of 20.1 kilometers (about 12.5 miles), which is considered shallow. Shallow earthquakes tend to cause stronger shaking at the surface compared to deeper ones, making them more dangerous for nearby areas.

Tsunami Warning Promptly Issued

Soon after the quake, the National Tsunami Warning Center (NTWC) in Palmer, Alaska, issued a tsunami warning for parts of southern Alaska and the Alaska Peninsula.

In its official update, the center stated, “A tsunami has been confirmed and some impacts are expected.”

The tsunami warning zone stretches from Kennedy Entrance — located about 40 miles southwest of Homer — to Unimak Pass, which lies approximately 80 miles northeast of Unalaska. This coastal stretch includes communities that are vulnerable to tsunami waves due to their location along the Pacific Ocean.

Authorities urged people in low-lying coastal areas to remain alert, monitor updates, and follow evacuation protocols if needed.

Alaska’s History with Earthquakes

Alaska lies within the seismically active Pacific “Ring of Fire.” This region is known for frequent and powerful earthquakes due to the movement of tectonic plates.
It is the most earthquake-prone state in the United States, experiencing thousands of small quakes every year — along with the occasional major one.

For example, just last year in July 2023, a 7.2-magnitude earthquake hit off the Alaskan Peninsula. Although that quake was similar in strength, it did not cause significant damage or trigger a tsunami.

Emergency Services and Public Response

Emergency officials in Alaska acted quickly after Wednesday’s earthquake. They monitored seismic activity and wave patterns to assess tsunami risks.
No immediate reports of damage or injuries were released. However, authorities continued to observe the region for aftershocks or additional threats.

Residents in affected areas were advised to stay away from beaches and harbors and to move to higher ground if instructed.

Scientific Monitoring Continues

The USGS and NTWC are continuing to monitor aftershocks and potential tsunami activity. Earthquake experts often watch for smaller quakes following major ones, which can sometimes cause additional shaking or damage.