Cascadia's Fault Quotes

“Bottom line: if you're on a beach and the ground starts shaking - and especially if that shaking lasts more than one minute - it's probably a subduction earthquake and there probably will be a tsunami. The shaking is all the warning you're going to get. Head for higher ground immediately and don't wait for any official notification.”
― Jerry Thompson, Cascadia's Fault: The Coming Earthquake and Tsunami That Could Devastate North America

“Bottom line: if you’re on a beach and the ground starts shaking—and especially if that shaking lasts more than one minute—it’s probably a subduction earthquake and there probably will be a tsunami. The shaking is all the warning you’re going to get.”
― Jerry Thompson, Cascadia's Fault: The Coming Earthquake and Tsunami that Could Devastate North America

“learned why those canyons and channels cutting across the flat surface of the ocean floor looked so much like a big river and its tributaries meandering across the prairies. It’s because that’s exactly what they are. This spidery web of channels is basically an extension of the Columbia River system across the sea floor—through the mud on top of the Juan de Fuca plate.”
― Jerry Thompson, Cascadia's Fault: The Coming Earthquake and Tsunami that Could Devastate North America

“The upper part of the mountain had completely disappeared in a spectacular blast that caused the lower walls of the volcano to collapse inward, creating a huge, circular hole in the ground—a caldera—five miles (8 km) wide. This gradually filled with snowmelt and rainwater to form Crater Lake—with a maximum depth of 1,958 feet (597 m), the deepest lake in the United States. Magma spilled from cracks along the shattered volcanic rim and surged downhill in avalanches that filled nearby valleys with up to three hundred feet (90 m) of hot rock, pumice, and ash. Somewhere between eleven and fourteen cubic miles (not cubic yards, cubic miles, or 46–58 km3) of magma was ejected. A towering column of ash thirty miles (48 km) high rained down for several days on eastern Oregon, Washington, Idaho, Montana, Nevada, and southwestern Canada. An ash layer half an inch (1 cm) thick was measured in Saskatchewan, 745 miles (1,200 km) from its origin.”
― Jerry Thompson, Cascadia's Fault: The Coming Earthquake and Tsunami that Could Devastate North America