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

The quake is the sixth-strongest on record, according to the United States Geological Survey. It’s also the largest since ...

Here’s a glance at some of the most powerful earthquakes recorded previously, according to the U.S. Geological Survey.

A magnitude-8.7 earthquake in Russia’s Far East early Wednesday prompted tsunami warnings in parts of Japan, Alaska and ...