A hidden chunk of an ancient tectonic plate is stuck to the Pacific Ocean floor and sliding under North America, complicating earthquake risk at the Cascadia subduction zone. When you purchase through ...

A hidden shard of ancient crust has been detected where California’s San Andreas system collides with the Cascadia subduction zone, reshaping how I understand the tectonic engine of the West Coast.

Today, the Denali Fault rips apart some of the North American plate, but it was once a place where tectonic plates came together. When you purchase through links on our site, we may earn an affiliate ...

By tracking swarms of very small earthquakes, seismologists are getting a new picture of the complex region where the San ...

The study, led by U of A geophysicist graduate Songyun Huang and professor of geophysics Jeff Gu, uses seismic data from ...

Cratons are the most ancient, stable pieces of tectonic plates, but even these geological formations can change over time. A new study details how the North American plate is “dripping” into the ...

Scientists uncover hidden faults beneath Northern California’s Mendocino triple junction. The discovery reshapes ...

There are seven continents on Earth, or so we learned in school. But it turns out that these designations are not as straightforward as they seem, and different scientists have different views on how ...