Humming then a loud subsonic boom or explosion
Humming then object appeared in sky a loud boom or explosion then several flashes . Appeared to be decending after boom.
Humming then object appeared in sky a loud boom or explosion then several flashes . Appeared to be decending after boom.
No
Yes
No
Yes
No
Yes
Yes
Off
No
No
No
No
No
Yes
Yes
Denver
USA
30 minutes
30 minutes
39.74
-104.98
flash
CO
Occurred : 5/21/1998 21:30 (Entered as : 05/21/98 21:30) Reported: 9/23/1998 16:22 Posted: 1/28/1999 Location: Denver, CO Shape: Flash Duration: 30 minutes Characteristics: The object left a trail, There was an aura or haze around the object, The object changed color, The object made a sound, There were aircraft in the vicinity or aircraft chasing the object, There were electrical or magnetic effects
Humming then a loud subsonic boom or explosion