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Entry  Tue Sep 14 17:19:38 2021, Paco, Summary, PEM, Excess seismic noise in 0.1 - 0.3 Hz band SEIS_2021-09-14_17-33-12.png
    Reply  Tue Sep 14 19:12:03 2021, Koji, Summary, PEM, Excess seismic noise in 0.1 - 0.3 Hz band C1-ALL_393F21_SPECTRUM-1315699218-86400.pngC1-ALL_393F21_SPECTRUM-1315267218-86400.png
Message ID: 16329     Entry time: Tue Sep 14 17:19:38 2021     Reply to this: 16331
Author: Paco 
Type: Summary 
Category: PEM 
Subject: Excess seismic noise in 0.1 - 0.3 Hz band 

For the past couple of days the 0.1 to 0.3 Hz RMS seismic noise along BS-X has increased. Attachment 1 shows the hour trend in the last ~ 10 days. We'll keep monitoring it, but one thing to note is how uncorrelated it seems to be from other frequency bands. The vertical axis in the plot is in um / s

Attachment 1: SEIS_2021-09-14_17-33-12.png  18 kB  Uploaded Tue Sep 14 18:36:16 2021  | Hide | Hide all
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