A powerful 7,3 magnitude earthquake struck off the southern coast of Alaska on Wednesday, triggering alarms across the region and creating tense moments for residents of several coastal communities. The situation prompted a tsunami warning , putting residents and authorities on high alert as they closely monitored the natural phenomenon.
As information came in from official agencies, concern grew in towns like Sand Point, Cold Bay, and Kodiak, located near the epicenter. Emergency sirens sounded in various locations , urging residents to move to higher ground or take refuge on upper floors of buildings. The alert was downgraded to a warning after an analysis of the tsunami's danger, indicating that the threat only affected areas directly exposed to the sea.
Location and characteristics of the earthquake
The earthquake was detected by the United States Geological Survey (USGS) and the National Weather Service (NWS) at approximately 12:37 p.m. (local time). The epicenter was located about 87 kilometers south of Sand Point , in the Shumagin archipelago, at an estimated depth of 20 kilometers. Initially reported as a magnitude 7,2, after further analysis, official agencies revised the figure to 7,3 on the Richter scale.
The tremor was felt intensely in different locations on the Alaska Peninsula and nearby areas, although the USGS noted that the risk of casualties and material damage is low , partly because much of the population resides in homes designed to withstand earthquakes, although there are some more vulnerable structures.
Tsunami warning zone and range
A tsunami warning was issued for southern Alaska and the Alaska Peninsula , covering the area from Kennedy Entrance—about 65 kilometers southwest of Homer—to Unimak Pass, near Unalaska. Experts said tsunami activity could begin around 1:30 p.m. (Alaska time) at Sand Point and spread toward Kodiak and other nearby areas. However, no other areas of the United States or Canada were threatened, according to the National Weather Service (NWS) and the National Oceanic and Atmospheric Administration (NOAA).
After reviewing the data and confirming that the waves generated by the earthquake would not cause widespread flooding or dangerous currents far from the coast, authorities lowered the alert level to "warning ." This means the risk was limited to beach areas, ports, and immediate coastal zones.
Emergency reactions and actions
Given the situation, residents of towns under alert received clear instructions from the authorities: leave coastal areas , avoid beaches and ports, and move to higher ground or areas away from the water. In places like Unalaska and the city of Kodiak, evacuation protocols were activated, and many people sought shelter until the alert level was lowered and they could return to their homes.
Specialists emphasized that, in these cases, acting quickly and always following the instructions of civil protection teams is essential, as tsunami-related phenomena can be unpredictable. Coordination worked well in this case, minimizing potential damage.
Residents of the hardest-hit areas gradually returned to normal life, grateful that early warning systems had fulfilled their role in reducing risks.