In the wake of a powerful 7.5 earthquake in Alaska, a Tsunami Advisory has been issued for the entire state of Hawaii effective 4:38 pm local time, 10:38 pm ET. The Alaska quake occurred at 10:55 am Hawaii time south of Alaska near 54.7 N 159.6 W. That event triggered a Tsunami Warning earlier today in Alaska. However, with ocean gauges indicating unusual water levels around Hawaii, the Pacific Tsunami Warning Center issued the advisory for the Aloha State.
The greatest unusual wave activity is happening on Hawaii’s Big Island and Maui Island now. Hilo, Hawaii saw a 1 ft rise in water with a 16 minute period; Kahului, Maui saw a 1.2 foot rise with a 20 minute period. Other rises were reported at Kawaihae on Hawaii’s Big Island, and Mokuoloe, Oahu Island.
However, based on all available data a major tsunami isn’t expected to strike the State of Hawaii. However, because these sea level changes are above advisory levels, hazards could occur. Swimmers and boaters and others near the shore at beaches and in/around harbors and marinas could be threatened by tsunami-related hazards. The threat may continue for several hours after the initial wave arrival, which occurred around 3:30pm local time.
The Pacific Tsunami Warning Center will issue hourly updates on this situation until the threat has passed. These advisories are being communicated to the public through Hawaii Emergency Management and Civil Defense officials.