— James Webb, Mineral Point, Wis. A Chuck DeMets, professor of geophysics at the University of Wisconsin-Madison: Most earthquakes occur when a geological fault, a fracture within the Earth’s crust, ...

Learn how seismic waves helped identify rare mantle earthquakes deep below Earth’s crust, offering new insight into the ...

It was a groundbreaking discovery. Scientists have found previously concealed fault lines along California’s north coast, sparking concerns that we could be drastically underestimating the earthquake ...

The Mendocino Triple Junction off the coast of Northern California is the point where three tectonic plates meet. A new study reveals at least five moving pieces deep below the Earth's surface make up ...

In the photo above, a seismometer is buried about five feet underground. The seismometer is one of the units deployed by the Iowa Geological Survey so it could measure seismicity — or the frequency of ...