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What time could a tsunami hit Hawaii? Key details amid ongoing threat
Hawaii is under a tsunami watch after a magnitude 8.7 earthquake struck Russia's Kamchatka Peninsula. A tsunami advisory has been issued for parts of Japan.
Hawaii is under a tsunami watch after a powerful magnitude 8.7 earthquake struck off the coast of Russia’s Kamchatka Peninsula. The watch was issued at 1:33 p.m. HST on Tuesday. According to the U.S. Geological Survey, the earthquake was shallow, occurring at a depth of 19.3 kilometers (12 miles).
According to the U.S. Tsunami Warning System, “Based on all available data, a tsunami may have been generated by this earthquake that could be destructive on coastal areas even far from the epicenter. An investigation is underway to determine if there is a tsunami threat to Hawaii.”
“If tsunami waves impact Hawaii, the estimated earliest arrival of the first tsunami wave is: 7:17 p.m. HST, Tuesday, July 29, 2025. Further messages will be issued hourly or sooner as conditions warrant until the threat to Hawaii has passed.”
Also Read: Russia earthquake: Scary videos show buildings shaking as quake hits Kamchatka
Tsunami warning for parts of Alaska
A tsunami warning has also been issued for parts of Alaska. The warning covers the Aleutian Islands, from Samalga Pass (30 miles southwest of Nikolski) to Attu, including the Pribilof Islands.
A tsunami advisory is in effect for:
South Alaska and the Alaska Peninsula, along the Pacific coast from Chignik Bay to Unimak Pass (80 miles northeast of Unalaska)
Aleutian Islands, from Unimak Pass to Samalga Pass
US states under tsunami watch
Several US states, including California, Washington, Oregon, and Alaska, are under a tsunami watch.
Also Read: 'Tsunami has been confirmed’: NWS issues urgent warning after powerful Russia earthquake
Tsunami advisory for Japan
Japan’s Meteorological Agency has also issued a tsunami advisory for parts of the country's Pacific coast, warning of possible waves up to 1 meter (about 3 feet). The earthquake’s epicenter was approximately 250 kilometers (160 miles) from Hokkaido and was only weakly felt, according to Japan’s NHK television.
