That is a fascinating article, Dawn! I found the comments at the bottom particularly interesting. Like Silsbey's comment, "...The hum was very loud for a few days leading up to that event and I am convinced the sound is the earth's crust moving."

Hmm, like the orbs phenomenon, this thing seems to be building in the numbers of people experiencing it. And speaking of orbs, my husband's photos contain orbs much of the time now I've noticed. Used to be only mine did.