[Scan-DC] 9:54PM EST in suburban MD, Sonic boom or thunder?

[b_thom at juno.com]

On Wed, 25 Jan 2006 12:02:35 -0500 "Cathy Drzyzgula"
<cathy at drzyzgula.org> writes:
> So these sounds were heard in Beltsville, Gaithersburg, Alexandria 
> and  
> Frederick county, all within 15 minutes.  Is this something that 
> fits with  
> sonic booms?  

No. A sonic boom is sharper, and there are two wavefronts. They go "CRACK
- CRACK." Sorry for the shouting.... I am four miles south of the
Pentagon, and I **vividly** recall hearing the fighters arrive soon after
Flight 77 crashed into the Pentagon.