- This region lies along the boundary between the Juan de Fuca Plate and the North American Plate.
- It stretches from California to southern Alaska.
- Known for its volcanic activity, with multiple active volcanoes like Mount St. Helens and Mount Rainier.
- Frequent earthquakes also occur due to the convergence of the two plates.
2. The San Andreas Fault in California:
- The San Andreas Fault is a major strike-slip fault that runs through California.
- It marks the boundary between the Pacific Plate and the North American Plate.
- Crustal activity along this fault results in periodic earthquakes, some of which have been historically significant.
3. Central America:
- Central America, particularly near the coasts, is an area with significant crustal activity.
- It sits on the Cocos Plate which subducts beneath the Caribbean Plate and the North American Plate.
- Volcanic activity is prevalent in countries like Guatemala, Nicaragua, and Costa Rica.
- Numerous historical eruptions and frequent seismic activity characterize these regions.
4. The Caribbean:
- The Caribbean region is prone to earthquakes and volcanic eruptions due to its complex tectonic setting.
- Several microplates interact with the North American and South American plates.
- Volcanic activity is notable in places like the Lesser Antilles arc system, with islands such as Montserrat and Martinique having active volcanoes.
