Reports Report 1144l (Event 1144-2018)

This report has been linked to the following event: Event 1144-2018
Observer
NameMary M
Experience Level3/5
RemarksI let the dogs out just prior to the event. It was very dark and I was at the door window looking south when the yard lit up for about 2-3 seconds in bright green. Moments after, I heard a boom that sounded like thunder in a completely clear sky. Folks 12 miles to my west (Estes Park, CO) are also reporting it- feeling their homes shake and hearing an explosion. I did not see it directly, but my perception was an east to west trajectory. I live at the bottom of a steep canyon, Big Thompson Canyon on Hwy 34. It had to be directly overhead to light things up like it did, no long shadows.
Location
AddressDrake, CO
Latitude40° 25' 47.03'' N (40.43°)
Longitude 105° 19' 42.93'' W (-105.33°)
Elevation1913.52m
Time and Duration
Local Date & Time2018-03-24 04:21 MDT
UT Date & Time2018-03-24 10:21 UT
Duration≈3.5s
Direction
Moving directionFrom up left to down right
Descent Angle92°
Moving
Facing azimuth-
First azimuth90°
First elevation90°
Last azimuth90°
Last elevation90°
Brightness and color
Stellar Magnitude-20
ColorGreen
Concurrent Sound
ObservationUnknown
Remarks-
Delayed Sound
ObservationYes
RemarksMaybe a minute after the flash, I heard what sounded like thunder- a distant boom.
Persistent train
ObservationUnknown
Duration-
Length-
Remarks-
Terminal flash
ObservationUnknown
Remarks-
Fragmentation
ObservationUnknown
Remarks-