sheila.dwyer@LIGO.ORG - posted 17:44, Tuesday 01 April 2014 - last comment - 11:43, Thursday 03 April 2014(11120)
ISIs tripped
There was a magnitude 8 earthquake in Chile, all BSC ISIs tripped.
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How did the new BSC SEI guardians do in recovering everything? Where there any problems or hiccups? Did it go smoothly?
Thanks for posting the data, Sheila. We (by which I mean Hugo) will look at this a bit more. A quick look makes it seems that all three vertical drives on 3 of 4 platforms were pushed to the max within 1 second of each other. Many people (W. Hua, Rana, Dan Clark, me, Peter F, et. al.) have suggested that using that using the sensor correction to only isolate against differential motion, rather than trying to get rid of the absolute motion as the whole site heaves up-and-down would be a smart thing to do. I think this will be a good example to look at. -Brian
TIme series were collected on both BS (ground STS, high gain) and ETMX (ground T240, low gain) at LHO.
They can be found on the svn at:
ligo/svncommon/SeiSVN/seismic/Common/Data/2014_04_01__Chile_Earthquake_Data/
For reference, LHO ground sensor time series were also colected for previous earthquake data, recorded on March 3rd of 2014. ligo/svncommon/SeiSVN/seismic/Common/Data/2014_03_10__Earthquake_Data/
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