Tsunami warnings are being downgraded in most areas following one of this century’s most powerful earthquakes in Russia.

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.

Past strong earthquakes have caused massive and damaging waves far away, but scientists say these tsunami waves were tame by comparison across the Pacific basin.