Earthquake Science and Engineering

Caltech has led the way in earthquake science and engineering for nearly a century, establishing the theoretical underpinnings of geophysics, helping develop seismology into an international science, inventing the Richter scale, and creating the modern field of earthquake engineering. Today, Caltech trailblazers are imaging earthquakes with unprecedented resolution, developing and deploying early-warning systems, and engineering more robust buildings. Your investment can help us mitigate damage and save lives.

The Moving Earth, Micro to Mega

When Caltech’s Nadia Lapusta creates computer models of earthquakes, she must integrate an astonishing range of data—on scales from thousands of kilometers down to microns and from millennia down to thousandths of a second. That’s because to understand the big and slow, she needs to understand the tiny and fast. “Large-scale earthquake ruptures—even those around 8 on the Richter scale—are ultimately happening in very narrow layers of granulated rock,” she says. In fact, where one side of a fault moves against the other, those layers are powdered so thin that a stack of a thousand grains would equal the thickness of a credit card. And although a fault can go eons between destructive quakes, the first slip that kicks off the shaking can take place in a blink.

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