Diamond over Atlin, BC · Canada

The report, as filed

we live in south facing cabin and monitor air traffic over our home and valley.my wife noticed very bright abnormal light traveleing at a fast speed across the sky just above mountain tops.i was able to put binos on for brief moment before it traveled out of view.it had a prism shape of very white light.this was not a commercial aircraft.at the same time as it passed a very high craft traveled south to north over us.this we heard the sonic boom.it was not a civillian aircraft as it traveled to high and too fast.the prism light was completely quite and brighter than any star or aircraft I have ever seen.this was not the space station or satilite.everthing about my sighting I felt was not anything I have seen latley.i have been a canadien ranger and was briefed on reporting these objects.

Held as-reported from National UFO Reporting Center (record NUFORC #175825). Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.