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National UFO Reporting Center
Sighting Report
Occurred : 10/4/1999 02:00 (Entered as : 10/04/99 0200)
Reported: 10/9/1999 01:41
Posted: 3/21/2003
Location: Broomfield, CO
Shape: Unknown
Duration:2-3 seconds
Sensation like sonic boom shook house, with no noise -just a pressure wave

At above time and date, reporting person stated a pressure wave shook house, rattled windows, a dog and three cats reacted to the event and her husband noted the event as well. Contact with Broomfield Police Department disclosed no other reports made to the PD. A check with USGS Earthquake Center in Golden, CO, also disclosed no seismic activity recorded in the state on that date. Report via Colorado MUFON Hotline/J Nelson, follow up by COMUFON investigators.