Final answer:
The Pacific Plate is moving northward, carrying the Hawaiian Islands with it. It shares a boundary with the North American Plate along the San Andreas Fault, influencing the movement of cities like Los Angeles.
Step-by-step explanation:
The Pacific Plate, upon which the Hawaiian Islands rest, is moving in a northward direction. This movement is caused by the dynamics of tectonic plates, which are massive sections of the Earth's lithosphere that move and interact at their boundaries. The Pacific Plate's northward motion is associated with the famous San Andreas Fault, a transform boundary it shares with the North American Plate.
Urban centers like Los Angeles and San Diego are situated on the Pacific Plate and travel with it as it shifts. Over millions of years, this motion may result in significant geographic changes, such as Los Angeles potentially becoming an island off the coast of San Francisco.