My Second California Earthquake

On a personal note, I've now experienced my second California earthquick, albeit a tiny one--3.5. The ominous thing, though, is that the quake was centered in almost the exact same place as last week's 4.2 quake, north of Chatsworth, CA (which, again, is about 7 miles or so north of me).

I haven't studied earthquakes, but that does seem of some concern.