Mainland U.S. on Alert
Warnings are also in effect from Northern California through Oregon, Washington, and parts of Alaska.
Here’s what we know so far:
San Francisco could see waves around 12:40 a.m.
Los Angeles area closer to 1:00 a.m.
Coastal Oregon and Washington just before midnight
Waves might stay under a foot in most places, but spots like Port San Luis could see surges up to 3 feet. Even smaller waves can cause strong, dangerous currents.
This is one of the strongest earthquakes recorded anywhere in recent years. Several big aftershocks have already followed, some over magnitude 7.5.
Experts say the tsunami threat could last several hours, and more waves are still possible.