Officials from Japan to California issued warnings after an 8.8-magnitude quake off Russia’s coast. Hours later, there were no immediate reports of major damage, although some areas remained on alert.

One of the world’s strongest earthquakes struck Russia’s Far East on Wednesday as an 8.8-magnitude tremor set off a tsunami in the northern Pacific and prompted warnings for Alaska, Hawaii and south toward New Zealand.

One of the most powerful earthquakes in modern history shook Russia’s remote east coast Wednesday, sending tsunami waves hurtling across the Pacific Ocean and putting nations from Japan to the United States to Chile on high alert with millions urged to evacuate.