S Cooper, S Dwyer, J Warner, 

Attached in this alog are some overviews of the total number of watchdog trips by subsystem (HEPI,ISI,SUS) per chamber over the course of O2 for some known large earthquakes. We get this data by looking at the state of the watchdogs for each subsystem over the course of two hours during an earthquake using minute trended data. To generate these plots we look at the WD_MON State channels and just check for if they ever deviate from their ideal value (1 in most cases) and sum the number of events that these trip. We also pull the interferometer lock state to a) monitor lock losses and b) to veto any trips caused by frontend crashes rather than earthquakes. 

Also attached is some comma delimited text files containing information on which of these watchdogs tripped first for each earthquake, with a list of GPS times listed for each of these events. Note, again because of the minute trended nature of the data its hard to pinpoint what watchdog tripped first, as watchdogs that trip within a minute of each other will appear as having tripped at the same time. With the data being minute trended, it appears as if the suspension trips first, though this is not the case when examining the each of these events using finer timesteps. Note opening these in web browser will screw with the formatting. 

There are two events where HEPI appears to trip first when examining these events in minute trend these only appear to occur on ETMX, please take this with a grain of salt as this is based off minute trended data, so there may be other trips before HEPI on ETMX, that occur within the same minute, or HEPI trips on other chambers first before ISI trips. I plan to investigate these further with second trended/ full data rate  data.