Page 1

PRIMARY CODE: UNIDENTIFIED AERIAL PHENOMENON

Date: 02:55 11/09/2023

Paged: YES

Status: Closed

POD: DEN

Reporting Facility: ZME

REMARKS

Multiple aircraft reported an unidentified aerial phenomenon while at FL280/340/450. Object was on ARG324080 between FL900 and FL500 and reported as changing altitudes erratically. The unknown phenomenon had flashing lights.