Tag Archives: North American Plate

All the Warning We’ll Get

The Saddle Mountain Fault scenario envisions an 87-mile long failure of the fault.

The Saddle Mountain Fault scenario envisions an 87-mile long failure of the fault.

There was a small earthquake centered on Frenchman Hill one day around 1972. When an earthquake scientist from the University of Washington called Othello High School to look for a reliable  student to tend to a helicorder they were setting up at the epicenter, they ended up talking to my mother, the counselor. I was 16, and I had just gotten my driver’s license. She told them she had a perfect match for them.

So my second job off the home place (the first one was changing sprinklers for my neighbor) was visiting a tiny trailer parked next to a plowed field overlooking the Lower Crab Creek valley and the ancient massive slide on the north face of Saddle Mountain. Six seismographs fed streams of data to a series of heated needles that recorded every tremble of the earth around the trailer. I had to changed the waxed paper they burned their message onto once a day and then put in a phone call to Colorado to calibrate the clock with the National Bureau of Standards.

Although I didn’t know it at the time, this must have been a heady period for earthquake scientists in the Northwest. Endorsement of the theory of plate tectonics was in its infancy. Continue reading

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