It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Thank you.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Seismology sleuths may have tracked down the source of a mysterious vibration that shook homes and echoed throughout the northwest this week.
A series of clues have led university researcher David Eaton to believe a schoolyard in Panorama Hills was the likely epicentre of what may have been a rare frost quake.
This crack, at Captain Nichola Goddard School in Panorama Hills, may be the source of a loud booming noise heard Monday night.