1. The problem statement, all variables and given/known data What's the difference in using GPS Data vs. using Magnetic anomalies, fracture zones, hot spots to analyze plate motion? 2. Relevant equations 3. The attempt at a solution Seems like a question with a direct answer. What's the difference between the two? I am struggling to find any notes or information on it. This is in reference to a report that went into detail about a GPS study of plate motions. I need to know the difference between the two measuring tools to understand what's going on. Any help? Thank you.