Why does Oregon participate in these earthquake drills? There are many reasons — including one "big one" — why residents ...

The Pacific Northwest is at risk for a mega-earthquake because of the Cascadia Subduction Zone. The region is primed for powerful quakes, with a particularly strong one called the Big One ...

I had experienced a couple of earthquakes ... scale. If you understand the logarithmic basis of the Richter Scale — that a 9.0 quake is ten times bigger than an 8.0 magnitude quake but 1,000 times ...