AUDIO-009 Acoustic Record Documented

Atmospheric Resonance Events

A class of low-frequency atmospheric sounds recorded independently across multiple continents beginning in 2011. Described as deep metallic groaning or trumpeting. Source unconfirmed. Proposed mechanisms range from atmospheric resonance to geomagnetic activity.

Signal Record — AUDIO-009
Atmospheric Resonance Events — Distributed field recordings, multiple continents
2011–present  ·  30–120 Hz, metallic resonance, low-frequency drone  ·  Civilian documentation / independent researchers
Recorded worldwide. Individual events last seconds to minutes. Multiple recordings show shared spectral characteristics across geographically distant locations.
What distinguishes the 2011 atmospheric sounds from ordinary environmental noise is their shared spectral profile across geographically distant recordings. Events documented in North America, Europe, and Asia within the same period showed similar tonal characteristics — suggesting either a globally distributed atmospheric phenomenon or a propagation mechanism that carries a regional source across continental distances. No mechanism has been confirmed.

Technical Parameters

Acoustic record IDAUDIO-009
Year2011–present
SourceDistributed field recordings, multiple continents
Network / RecordingCivilian documentation / independent researchers
Frequency30–120 Hz, metallic resonance, low-frequency drone
ClassificationUnresolved — proposed mechanisms include atmospheric resonance, geomagnetic activity, lithospheric processes
AudioAvailable