To see if any quakes occurred near a certain spot on the seismogram, just click the center of the trace line close to the event of interest. If any quakes were recorded between three minutes before your click and thirty seconds after it, they'll show up on the report. Just remember: quakes can go unreported for three or four days, depending on when they get around to them; the latest quake I have occurred at 07:50:21 on 2014/08/31 (MST).
Click here for a calendar for this seismogram centered on this day.