I ran Dan's code to compare stationarity between two hours on Oct 5th and Oct 12th. The closure of the beam diverter on the 6th was thought to help stationarity in the 70-100hz region, so I included versions zoomed in on that frequency range.
I tried to pick times that were not affected by huge glitches / range drops. On the 5th the two hours were 1:00-3:00UTC and on the 12th 00:00-02:00UTC.
plots attached
Sheila, Jordan
Made the same plots to compare the stationarity during times when anthropogenic seismic was quiet / loud. The 1-3 and 3-10 hz seismic bands pick up around 14:00 utc weekdays, and the data seems to become more nonstationary in the 100-200 Hz band during this time.
On the 12th, there is some unknown stuff going on at lower frequencies, and the ~300 hz periscope peaks are still visible. But just looking at the 100-200 hz region shows correlation with ground motion. Also have the same correlation on the 14th (spectrum overall looks very stationary, though). Mechanism still unknown... scattering?
