That explains the explosions I heard today

http://www.navsea.navy.mil/nswc/dahlgren/RANGE/rangeschedule.aspx

Welcome to the The Potomac River Test Range Website. This page provides daily information about the operations and scheduling of activities at the Potomac River Test Range and the Explosive Experimental Area (Pumpkin Neck). These facilities are used by our military to conduct munitions testing and should be avoided while testing is in progress. Click on any of the areas of interest to the right for additional information.

Range / Weapons Testing Hotline: 877-845-5656 (toll free) for daily updates on range operation and test schedules. 
Noise Questions & Comments: 866-359-5540 (toll free) to comment or ask a question about noise or vibrations you think are being caused by operations at Dahlgren.

If you have additional questions regarding Potomac River Test Range operations, please contact the NSWC Dahlgren Public Affairs Office at 540-653-8152.

Range Schedule
Wednesday Oct 23, 2013
Status:    On Schedule
Description:    Has the potential to produce noise, Single Shots will take place during this event, Heavy Smoke, Boat Operations, Base Road Closure
Tisdale Road restricted:    Yes
Start:    8:00 AM
End:    5:00 PM
Restriction:    River specific locations:
River restriction location from buoy N-VA SIDE to buoy O-MD SIDE
Thursday Oct 24, 2013
Status:    On Schedule
Description:    Has the potential to produce noise, Single Shots will take place during this event, Light flash or flares, Shots with parachute, Heavy Smoke, Boat Operations, Base Road Closure
Tisdale Road restricted:    Yes
Start:    8:00 AM
End:    5:00 PM
Restriction:    River specific locations:
River restriction location from buoy N-VA SIDE to buoy O-MD SIDE

Cpap 90 day history highlights

maximum usage one day 10 hours 38 minutes 36 seconds
average usage all days 6 hours 58 minutes 50 seconds
minimum usage one day 4 hours 34 minutes 43 seconds
average time and large leak per day 36 minutes 8 seconds
average A H I 5.0
C PAP pressure 14.0 cm H 2 O

Percentage of night in periodic breathing
clear airway apnea 0.2 percent
obstructed airway apnea 2.9 percent 
H 2.6
flow limitation 0.0
vibratory snore 8.6
re: 0.0
ahi 5.7