Final answer:
Geoscientists utilize GPS, VLBI, and earthquake analysis as evidence for plate motion, accounting for complex factors like differing motion rates due to an Euler pole.
Step-by-step explanation:
Three pieces of evidence that explain plate motion include global positioning satellites (GPS), very-long baseline interferometry (VLBI), and the study of earthquakes in relation to plate tectonics.
GPS and VLBI are sophisticated tools that geoscientists use to measure the motion of Earth's tectonic plates. This high-precision data helps calculate the rates at which two plates are moving apart or towards each other, revealing the dynamic nature of our planet's crust. Earthquake analysis is also crucial, as these natural events are closely linked with the edges of tectonic plates, where stress accumulates due to their movement, eventually leading to a quake when this stress is released.
Additionally, plate motions can result in different speeds and directions for different locations on a plate due to the rotation around an Euler pole. This concept is evident when considering hotspots like Yellowstone and Anahim, which, despite being on the same tectonic plate, do not display identical motion rates, illustrating the complexities of plate interactions.