[dtel]

It is really hard to believe something cruising through the air, 40 miles above earth, could actually make the ground shake.
It seemed like an earthquake was occuring.
Do you know if the boom was a sonic boom or an explosion?
It seemed more like an explosion to me. I have heard several sonic booms and this did not seem like a normal sonic boom.

[Xenalyte]

No earthquakes - east and south Texas doesn't get 'em, as far as I know, and I've been here for 34 years.