The data come from a dense network of seismographs, turning thousands of tiny ground vibrations into a sweeping, time‑lapse ...

The earliest scientists first observed the waves that earthquakes produce before they could accurately describe the nature of earthquakes or their fundamental causes, as discussed in Lessons 1–5.

An animation depicts how seismic waves will impact Los Angeles National Treasure: The History of the Lie Detector The Art of Video Games A Rare Look at Tucker Cars Follow Us Explore ...

An animation from the USGS shows a 7.8 magnitude earthquake on the San Andreas Fault in southern California National Treasure: The History of the Lie Detector The Incredible Flying Car of the 1950s ...