The Dominion Post is reporting a persistent hum across the neighbourhood, for which inventive and interesting explanations have been proposed. (Our favourite: Mt Victoria is humming because no-one has taught it the words.)
Perhaps we should teach the words …. so we consulted a few songwriters to see what the explanation could be. Neil Finn had the view:
This gentle hum
Is just begun
This gentle hum
Make us one
Bruce Cockburn said:
Planet engines pulsate in sideral time
If you listen close you can hear the whine
Other explanations and sightings (hearings?) of strange humming occurrences welcomed in the comments.