Students in groups of two are giving access to 3 component seismograms from four locations through Google Earth. They are then asked to pick the P-wave and S-wave arrivals using OneNote and convert the time lag into a distance to epicenter. A circle drawing application in Google Earth then allows them to plot possible locations for the earthquake epicenter. This activity gives students practice in interpreting data, analyzing uncertainty and error in data or data analysis, and peer teaching Uses online and/or real-time data