Curious Little Glitch

Seemed to coincide with a distant helicopter passing by. Nothing on the HDF channel other than the helicopter. Perhaps material contraction rather than specific local event. Nothing comparible on nearby shakes.


An intense one in the low frequencies, for sure!

We have seen instances of similar spikes in the past, and you can find a summary of the topics that covered them in this search: Search results for 'spike' - Raspberry Shake

This topic is probably one of the best on the subject: Spikes in Recording