Scientists warn that the Cascadia Subduction Zone is capable of unleashing a massive 9.2 earthquake and tsunami that could cripple the Pacific Northwest. This video explains why the region is ...

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

More than 300 years ago, a massive earthquake rocked the Pacific Northwest. That event came from the Cascadia subduction zone, a 700 mile fault line stretching from Northern California to British ...

PORT ANGELES, Wash. — Port Angeles faces significant tsunami danger from a Cascadia subduction zone earthquake that could send waves 16 feet high or more crashing into its waterfront in less than an ...

Even long-lived subduction zones eventually die, and scientists believe they are witnessing the slow death of one in the northern end of the Cascadia subduction zone. A new study using seismic data ...

For decades, the end-stage life of a subduction zone existed only in theory. Now, for the first time in geologic history, scientists are bearing witness to the Juan de Fuca Plate tearing apart and ...

The Carrizo Plain in eastern San Luis Obispo County contains the most strikingly graphic portion of the San Andreas Fault. Sediment cores recovered from the Pacific seafloor suggest that megathrust ...

Two earthquakes struck off the Oregon coast on Tuesday, rattling communities along the Pacific Northwest shoreline. The first temblor registered a magnitude of 5.4 and occurred about 100 miles west of ...

One of the most dangerous faults in the United States, the Cascadia Subduction Zone, may be able to trigger an earthquake on the San Andreas Fault, a new study says. But some scientists want more ...

If the Cascadia subduction zone and the San Andreas fault can act in concert, then seismic models must consider the possibility of coupled behavior. That could mean a higher short-term risk of back-to ...

For the first time, scientists have seen a subduction zone actively breaking apart beneath the Pacific Northwest. Seismic data show the oceanic plate tearing into fragments, forming microplates in a ...