A little exercise I suggest to get familiar with ArcGIS Explorer Online, where you can add different files (.csv, .shp, .gpx). In this case, I used a csv file from GeoCommunity at: http://spatialnews.geocomm.com/features/quakes2000/, and filtered information of earthquakes around the world registered in January 2000, but selected only the events with a magnitude higher than 4.00. Here's the result.
