Report Indexes : by Event Date  by Location  by Shape  by Posting Date

National UFO Reporting Center Sighting Report
Occurred : 9/20/2013 23:30 (Entered as : 09/20/2013 23:30)
Reported: 9/21/2013 12:09:51 PM 12:09
Posted: 9/30/2013
Location: Drexel Hill, PA
Duration: 45
Characteristics: Animals reacted to the event
Deep rumbling mimicking strange helicopter stopping abruptly.

We didn't see anything, but about 5 times, we heard a sound that we never heard before. It was like a deep military helicopter sound that stopped abruptly. The crickets didn't seem to mind, they would start up easily after the helicopter sound stopped. Usually the sound would stop when we went outside and the cats outside would come up to us like they were freaked out.

The weirdest thing about it is that the sound didn't fade, it just stopped on a dime and started on a dime.

We don't know what it was, it could have been military, but we have never heard any sound like that before in our lives.

((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))