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The Los Angeles earthquake hit a fault system that could pose a massive threat. Here’s what to know.
The Puente Hills fault lurks underground — buried under layers of rock and sediment. It’s part of a system of stacked and inclined faults, and while scientists aren’t sure exactly which one ...
Newly discovered fault line blamed for intensity of last April’s Big Apple quake —and could be concerning future threat
The angle sent seismic waves bouncing off a thick layer of rock, 20 miles below the planet ... Seismic activity along the ...
PBS5y
Geology of the Grand Canyon
"Scroll Down through History" displays the layers of rock exposed within the Grand Canyon ... now lies begins to shift and rise, creating fault lines. Evidence of this activity is still visible ...