Final answer:
The part of California west of the San Andreas fault is slowly moving northwest due to tectonic activity. Although it's not 'plowing into' Alaska, geological changes occur over millions of years. Predictions suggest changes such as Los Angeles and San Francisco becoming neighboring cities.
Step-by-step explanation:
When the part of California west of the San Andreas fault moves due to tectonic activity, it is expected to move northwestward, not directly 'plowing into' Alaska. The San Andreas fault is a boundary between two tectonic plates - the Pacific Plate and the North American Plate. The Pacific Plate (which includes part of California’s coastline) is slowly moving northwest compared to the North American Plate.
However, it's important to understand that these movements are extremely slow, occurring over millions of years. Predictions suggest that in about 15 million years, Los Angeles and San Francisco could be next-door neighbors. The exact impact on Alaska, if any, is hard to predict due to the complexities of plate tectonics.
Learn more about Plate Tectonics