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.

A tsunami has hit coastal areas of Russia’s Kuril Islands and Japan’s large northern island of Hokkaido after an 8.7-magnitude earthquake early on Wednesday. Tsunami warning sirens sounded in Honolulu, Hawaii, where people were told to move to higher ground.

The magnitude 8.8 quake is believed to be the joint sixth-largest on record, though only minor injuries near the epicenter have been reported.