Longitudinal waves at work

The CCAG was hit by a small earthquake measuring 3.9 today afternoon. Near Millibrae, the Earthquake did not affect the CCAG intirely. Since the disaster , we have not checked the ccag buildingsfor damage. Earthquakes are common in San Francisco, so there should be nothing damaged.

A Timelapse captured the earthquake at 6:42

https://video.wixstatic.com/video/9e862e_cf10654504b64cd28f46d47cb9b3e233/1080p/mp4/file.mp4

I try to tske a video of the TMAD, but the earthquake interrupted me, and I mis took it for someone stomping on the floor.

https://video.wixstatic.com/video/9e862e_0a85a84ab61a4bf0855547a7dc577429/1080p/mp4/file.mp4

A nighttime Timelapse video slowed down to 60fps captured the earthquake.