actually there was an earthquake in alaska at the approximate time you posted, although I'm surprised you felt it - maybe your place is spring loaded! but there is no mention of an aftershock at the later time you posted
Magnitude3.5 - 49km ESE of Healy, Alaska
Time2013-02-09 21:51:47-08:00Location63.658°N 148.060°WDepth81.5km