USA, California · 2021-04-18 · from the WORLDHUMMAP archive
Rumbling in USA, California
pulsing low rumbling like the sound of a tractor idling but slowed down so each pulse is slow and heavy. It was really scary as a child and often caused dreams of multi-story vehicles and industrial trash compactors when I was able to get to sleep in spite of it. My parents never believed me that there was a sound they couldn't hear; so my insomnia was ignored and I have permanent health conditions from not getting the sleep I needed to grow
What they reported
First noticed: 2000
Pitch: 3.65 Hertz on the "square" waveform
Loudest: During the night
Where: Indoors
Symptoms: Insomnia, Nausea, Sense of vibration, Anxiety
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constant low unevenly pulsing rumble, like a generator nearby It is less audible in the city during daytimes when there is plenty of ambient noise to drown it out; but if I find a quiet spot…
both described pulsing light · rumbling
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This is a Hum report from Dr Glen MacPherson's World Hum Map, an open, worldwide record of people who hear an unexplained low-frequency hum. Reproduced with permission and with thanks; the project is at thehum.info. We remove anything on request. Location shown is approximate.
Anomaly