An 8.7 magnitude earthquake off the Russian coast on Tuesday night has triggered tsunami alerts across the Pacific, prompting watches and advisories in California, Hawaii, and Alaska.

Meanwhile, Tonga’s Meteorological Service has reassured residents that no tsunami warning has been issued for the Kingdom.

The National Tsunami Warning Centre in the United States issued a tsunami watch for the entire coast of California, with estimated wave arrival times ranging from 1:05 a.m. in Los Angeles Harbour to 1.15am in Oceanside and La Jolla.

Hawaii was also placed under a tsunami watch at 1:33 p.m. HST, with Maui County estimating the earliest wave arrival at 7:17 p.m. HST.

Alaska’s Aleutian Islands are under a Tsunami Advisory, with waves expected to reach Shemya and Adak later in the evening. The advisory indicates that tsunami waves are likely, though less severe than those under a full warning.

In Tonga, the Meteorological Service confirmed that no tsunami warning is currently in effect, and emphasised that official alerts will be issued only through its channels if conditions change.

The update comes as part of Tonga’s ongoing commitment to keeping residents informed amid rising regional concerns about seismic activity and oceanic threats.

The Governor’s Office of Emergency Services in California stated it is “monitoring any potential impacts to the state” following the quake and tsunami watch.

Authorities across the Pacific continue to assess the situation, with updates expected as more data becomes available.