Avoid or filter out occasional spike or glitch?

[jbeale]

I see the glitches on both my systems. Here is the one that’s underground:

Small outdoor vault

here is a closer view. Because I used a Pi Zero I also needed an external USB-Ethernet adaptor, and I am using an external PoE -> 5V converter as well. [RShake-view1_20190502_181856]

The lead-in cable is a CAT6 direct-burial type. Inside the wood box under the brick weight is just the geophone sensor, the Shake board mounted on a Pi-Zero, USB cable, and 5V power wires that are soldered to to the Shake board. The geophone is clamped to the plywood case using 0.041 stainless steel wire, twisted tight. The case sits on three leveling screws, which rest on the concrete pad.