Ancient 2,000-year-old artifacts were recovered from the Mediterranean Sea near Alexandria, Egypt, possibly from the sunken city of Canopus.

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.

Tsunami alerts were issued for Alaska and Hawaii on Tuesday after a major, 8.8 magnitude earthquake struck off the coast of Russia, according to officials.

The Atlantic coastline is vulnerable to tsunamis triggered by earthquakes and landslides across the ocean basin

Millions of people were evacuated, as minds cast back to the devastating tsunami of Boxing Day 2004 in the Indian Ocean and Japan 2011, both triggered by similarly large earthquakes. But today's tsunami has been much less severe, even though it's brought some damage.

A massive 7.4 magnitude earthquake struck off the coast of Russia’s Kamchatka Peninsula, triggering tsunami warnings and widespread concern. Within just 32 minutes, two more quakes followed — a 6.7 and a 5.

The risk of a devastating mega-tsunami from the Cascadia Subduction Zone highlights the need for improved evacuation plans.