New Zealand, Christchurch · 2018-05-22 · from the WORLDHUMMAP archive
Low rumbling. I live in an area that has experienced a lot of earthquakes, so when I first started hearing the hum I thought it was an approaching small earthquake but the earthquakes never arrive. I then thought someone must be running their car, or working on it late at night or maybe there's a tractor or something nearby, but being a small neighborhood that was easy to investigate and that wasn't the answer either. It's also not planes overhead, though we are in the flight path they sound distinctly different and being a small airport don't have any flights between 10pm and 6am so that can't be it either! I have heard it mostly every night, for about 18months now.
What they reported
First noticed: 2017
Pitch: B0, sine, 31 Hertz
Loudest: During the night
Where: Indoors
Symptoms: Insomnia;Anxiety
Changes with weather: Strong winds or heavy rain drown out the sound
What stood out: a low humrumbling
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Low, soft rumble - as if a large truck were idling in the distance - it varies, but not rhythmically - I can almost "feel" the vibrations. Most predominantly at night, in the bedroom on the…
both described a low hum · rumbling · on the other side of the country
It comes an goes , it's rarely a constant , however the hum sustaines for minutes on end at times , pulsating as well . I've looked into Flightradar24 & there is a refinery near my location…
both described a low hum · rumbling · on the other side of the country
Low strong rumbling usually at night. Sometimes accompanied with vibrations that can be felt. Sounds amplify while inside. It's difficult to determine what direction they come from. At times…
both described a low hum · rumbling
low frequency hum that sounds more internal than external. Seems to pulse sometimes, along with my heart beat. Hear it most at night. I can hear it louder some days and less other days. It s…
both described a low hum · rumbling · on the other side of the country
Very low pulsating rumble. Not unlike a distant diesel engine. I used to live near an alloy plant that had cooling towers with a very similar sound but this is much lower in frequency. The v…
both described a low hum · rumbling · on the other side of the country
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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