Plate Tectonics:
* Subduction Zones: The Pacific Plate is being subducted (forced) under the North American Plate along the west coast. This creates a lot of friction and pressure, causing the rocks to melt and rise to the surface as magma, leading to volcanic eruptions.
* Transform Fault Boundaries: The San Andreas Fault is a transform fault boundary where the Pacific Plate and the North American Plate slide past each other horizontally. This sliding motion creates stress that is released in the form of earthquakes.
East Coast's Stability:
* Continental Plate: The east coast of the US lies on the stable North American Plate. It's far away from any active subduction zones or major fault lines.
* Old, Stable Crust: The eastern part of the US is composed of very old and stable crust, which is less prone to tectonic activity.
Key Points:
* Ring of Fire: The Ring of Fire is a zone of intense volcanic activity and earthquakes due to the interaction of tectonic plates.
* Plate Boundaries: Different types of plate boundaries (subduction zones and transform faults) contribute to volcanic activity and earthquakes.
* Stable Crust: The eastern US lies on a stable continental plate, which makes it relatively free from volcanic activity and major earthquakes.
While the east coast is relatively stable, it's not entirely immune to seismic activity. Smaller earthquakes can occur due to old fault lines and human activities like fracking.
