Obtaining local seismology data from last week and 4 years ago? Seismic values from video?

[jatgg]

I recorded, via a video camera, man made seismic activity, last Monday and also just under 4 years ago.

How do I go about finding if any monitoring stations recorded any corresponding data on the two specific dates and times?

I am in the south eastern United States.


Also, what technology exists to even roughly approximate vibration levels or seismic activity from video recorded from a known device specifically and securely mounted?

Thank you, this is a subject far removed from my bailiwicks.