These were the Peru and Costa Rica earthquakes discussed in the earlier post and two EM Signals (UTC times) detected between the earthquake occurrence times.

2010/05/20 22:16:33 9.37N 84.25W 23 5.9 Costa Rica
2010/05/20 11:13:00 EM Signal
2010/05/20 10:12:00 EM Signal
2010/05/19 04:15:43 5.06S 77.55W 126 6.0 Northern Peru

The earthquake data are from the NEIS