Hi Canie: Good for you...trying to join Don. My 2 cents worth is that a quake at M>4.5 is very unlikely in your window (<5-10%).

I suggest the kiddies are responding to this:1.8 2001/09/21 12:19:07 33.688N 118.301W 0.0 2 km ( 1 mi) SSW of Pt. Fermin, San Pedro, CA

Or there is another microearthquake in the works very close to your cats' location. I'm guessing it'll come in at M<3.5...probably an M2.x...or less.