By tracking swarms of very small earthquakes, seismologists are getting a new picture of the complex region where the San Andreas fault meets the Cascadia subduction zone, an area that could give rise ...

Tremors beneath Northern California show hidden plate movement, helping scientists better understand where future big ...

Tiny earthquakes have revealed potentially deadly hidden faults beneath California. By tracking swarms of very small tremors, ...

Memorizing seven continents feels settled, like learning the alphabet. A new study argues the ground rules are less tidy.

A hidden shard of ancient crust has been detected where California’s San Andreas system collides with the Cascadia subduction ...

Invisible earthquakes are revealing a hidden tectonic puzzle beneath California’s most dangerous fault zone.

Map of Earth's principal tectonic plates. Earth's lithosphere. Major and minor plates. arrows indicate direction of movement at plate boundaries. Vector illustration. Billions of years ago, Earth's ...