Reports Report 3166a (Event 3166-2017)

Name Signe G
Experience Level 3/5
Remarks I was unable to find any other reports, but there must have been many witnesses, the interstate was heavily traveled with truck traffic
Address -
Latitude 43° 54' 55.48'' N (43.91541°)
Longitude 90° 51' 16.93'' W (-90.854702°)
Elevation 237.812m
Time and Duration
Local Date & Time 2017-09-10 23:39 CDT
UT Date & Time 2017-09-11 04:39 UT
Duration ≈1.5s
Moving direction From down left to up right
Descent Angle 70°
Facing azimuth 301.13°
First azimuth 291.75°
First elevation 75°
Last azimuth 297.63°
Last elevation 75°
Brightness and color
Stellar Magnitude -30
Color White
Concurrent Sound
Observation No
Remarks -
Delayed Sound
Observation No
Remarks -
Persistent train
Observation No
Duration -
Length -
Remarks -
Terminal flash
Observation Yes
Remarks My husband and i were driving east on I-90 from La Crosse just a couple miles from Sparta, Wis. when we saw at the exact same time what we both thought was an explosion in the sky. It was 11:39 p.m. 9/10/17 by our car clock. We both instantly said in unison "What the hell was that?". It was located high in the sky, about the height of the moon, there was no trail or tail at all, it was like a star exploded, not like any meteor that we have ever seen (and we have been sky watchers for decades). The flash was all at once, lasted just over a second, it was blue white like an electrical arch. We once had a transformer on our property hit by lightening and explode, it caused the night to look like daylight, this object did the same, and it left a lasting image in our eyes like when a camera flash goes off close to your face, It was frankly terrifying. We considered that it might have been a missle or a bomb exploding because we were in close proximity to both Fort McCoy and Camp Douglas, but it had absolutely no trail of any kind, and left no smoke or any trace that it had been there, it just flare out of nowhere, it was blinding, and then it was gone.
Observation No
Remarks -