What kind of damage do sonic booms cause?

Dear Tangoman:
I like the Concorde myself.
Sincerely,
Shaharaim Kumar
victoriatangoman wrote: I have read on numerous occasions that flight paths for the shuttle
have to be considerate of the double sonic booms it causes.

My questions:

What is a double sonic boom (other than two booms) and what causes
the double feature rather than the single boom?

Also, what damage on the ground will a sonic boom cause? Other than
a loud noise and window shaking. Will it damage building
foundations? Will it shatter windows?

Also, are all sonic booms the same or can they vary in intensity?
SOme louder than others. Some more intense. Some longer lasting.
Some covering a wider footprint.

TangoMan