Josh, Detchar, 

Our algorithms (hveto, upv) found that the end-Y magnetometers witness EM glitches once every 75 minutes VERY strongly and that these couple into DARM. Attached is a PDF that goes through the story somewhat narratively. Robert is aware of these and I hope that from the timing information on the last page of the PDF he may be able to predict a good time to visit EY. A good full omega scan is linked in the document too for folks that might want to look at how this couples into a bzillion channels.