US: 7.4-magnitude earthquake strikes 120 km south of Chignik (Alaska) on July 21; tsunami warning issued

Event

On Wednesday, July 22, the United States Geological Survey (USGS) recorded a 7.4-magnitude earthquake 120 km (75 mi) south of Chignik (Alaska). The earthquake struck at a depth of 12 km (8 mi) at 22:12 (local time July 21). The US Tsunami Warning System issued a statement that a tsunami warning has been issued. The warning covers south Alaska and the Alaska Peninsula, and the Pacific coasts from Kennedy Entrance to Unimak Pass. There have been no reports of damages or casualties.

Aftershocks are possible in the affected area over the coming hours and days. 

Advice

Individuals in the affected areas are advised to monitor the situation and prepare for potential aftershocks.

In the event of aftershocks, individuals are advised to protect themselves as much as possible from falling debris if indoors (e.g., under a table), move away from windows, and not attempt to leave a building unless there is immediate danger. If outdoors, move away from tall buildings, utility wires, and streetlights. Follow authority directives.