A massive 1,000-foot "mega tsunami" could strike the U.S. West Coast — and scientists say it’s not a matter of if, but when. Triggered by the dangerous Cascadia Subduction Zone, this wave could drown cities like Seattle and Portland in just minutes.

The U.S. Tsunami Warning System issued a tsunami threat after the quake, saying hazardous waves were possible for coasts near the epicenter.

Authorities briefly issued tsunami warnings after a 7.8-magnitude earthquake in the Drake Passage but withdrew them within an hour, citing deep, rough waters that reduce the risk of coastal impact.

A powerful 7.4-magnitude earthquake struck off the coast of the southern Philippines island of Mindanao early Friday morning local time, according to the U.S. Geological Survey, prompting a tsunami warning for the local region.

Are We Ready? :water_wave: Scientists have issued a stark warning about a potential mega tsunami that could devastate the US Pacific Coast. There's a 15% chance of a massive magnitude 8.0+ earthquake striking the Cascadia Subduction Zone within the next 50 years.