About 3/4 of an an hour ago I was in my driveway minding my own business when my west-facing two-car garage door started shaking violently, and for no readily apparent reason. No other “symptoms” were in evidence. I stood there like an idjit for a while, looking at the sky (no sign of interesting contrails), off to the west at the hill between me and ATK (no sign of smoke or bits blowing into the sky) and at the rest of the world (no sign of stuff falling over). Something like 15 to 30 seconds later, it happened again, the garage door shook like someone was physically banging on it. There *may* have been a slight swaying in the ground, but I wasn’t sure of that.
Earthquakes are nothing new, but rest assured that having sizable structures suddenly shaking by themselves is a little disconcerting.
So far the USGS website shows no earthquakes anywhere nearby. I called a neighbor and he reported a similar experience in his workshop, so at least it wasn’t just be going bugnuts. I wonder if it was something “funny” going on at ATK… a rocket test,a burnoff of propellant, a series of detonations. Hmmm.