Some symbols are, of course, hidden due to overlap.
The yellow-green star outline is centered on the epicenter of the mainshock, which would have been totally hidden by aftershock symbols if plotted normally as a circle. Highways appear in tan, lakes in light blue, and the surface traces of faults are shown in greenish-blue. The date is given in the upper right corner. It is also possible to view this animation without a background , should you wish. Unfortunately, some browsers may not align the animation correctly.