BrianL has been working on new code to make it easier to see when earthquakes are actually arriving on site. I won't go into details of the new code, but the idea is to take the CS STS Z ground velocity  and do some more clever band-passing of it to get a better real-time measure of peak velocity in the earthquake frequency band. If anyone is interested, Brian's install document T1900149 gives a more complete story, the approved ECR is E1900108. This morning I installed the part in SEIPROC and it is running now.

The problem with the already existing ground STS BLRMS on the wall FOMs we have been using is that the rise time of the .03-.1hz bandpass filter is on the order of 2 minutes, which means that often the earthquake has passed before we see anything on the wall. This new code should only lag by a few seconds at most. Brian's document covers a few example earthquakes. 

I have added some links to the ISI_CONFIG screen to access the filters and some displays for this new code.  In the bottom right corner of the ISI_CONFIG screen there are 3 new buttons: the SEISMON overview, a screen that Brian made for this peak ground velocity monitor code and an ndscope template for the eq band peak velocities. The ndscope should be sufficient for most control room uses, and is more flexible than the MEDM. 

Having just installed this, I don't have any real guidance yet, but I would expect that when Seismon or verbal gives notification of an incoming earthquake, it would be useful to have the ndscope up to see if this peak velocity monitor gives better early warning of the earthquake than, say, IFO control signals.