Observation Recorded: 11:27 UTC. Location: Sector Delta-47B. A routine surveillance indicates the emergence of cyclical audible phenomena suspected to be within the uncharted territories. Initial phases show a repetitive modulation at intervals of thirteen seconds.
Analysis commenced with auditory profiling, revealing an array of harmonics ranging from 450 Hz to a sporadic drop at 150 Hz. The modulation appears to be non-anthropic; further thermal imaging in underway for additional data collection.
Data Point Update: 03:45, an undefined crest with amplitude variance causes speculation on geological disturbances or foreign electromagnetic interferences. The originating site remains ambiguous with no known satellite coverage.
Research Advocate’s Note: Further inquiry necessitates location triangulation via terrestrial and aerial avenues. Communication lines remain established with external research entities.