Thursday's tsunami warning left many scared and wondering, what are the signs and causes of a tsunami ... Cascadia Subduction Zone and the Mendocino Fracture Zone. "We live in earthquake country ...

January 26 marked the 325th anniversary since the last earthquake struck the Cascadia subduction zone. Centuries later, the ancient quake has left clues for scientists to prepare for the next one.

One such hot zone is the coastline stretching from ... it's essential to know nature's three tsunami warning signs, Bernard says. "If you feel an earthquake, if you see the water retreating ...

But if you don't have prior knowledge of whether you're in a tsunami hazard zone, and no maps or evacuation signs are available, aim for spots 100 feet above sea level and as far as two miles ...

Israel, with its nearly 200-kilometer Mediterranean coastline already fitted with tsunami warning signs, is on high alert.

"If the eruption is accompanied by an earthquake, the quakes could create tsunami waves that will affect the Aegean Islands, ...