Chris,

Here's the link to the Petaluma monitoring station, which is about 10 miles north of the Black-Point site. Notice the center spike. It shows the monitor is working correctly and there is no activity.

The data from Black Point shows an elevation and when it reaches the point where the graph data is in the top third (as seen from the link above) of the graph and it stays there for a period of three days, supposedly it means its possible to see a 5.0 plus magnitude earthquake.

The link to all of the sites is below in my post about Southern, CA if you'd like to take the tour. Canie participated in the installation of one of the stations in her area last year.

If you watch formula car racing, or NHRA you will have seen this area on TV. It's currently called Infineon Raceway and was previously known as Sears Point Raceway. As an aside my daughter had a job out there this past summer car modeling. I was so proud. She's beautiful.

Petra

• EQ Tracker/Petaluma Station