Here are some Dataviewer snapshoots of the event. Huge excitations start at 11:50am on March 1, 2012. (19:50 UTC)

Failure_3.png presents the coil drivers readbacks. Signals start going out of the coil drivers at 11:50am for no obvious reasons.

Models.png shows the last filter banks before the DAQ. The output channels are (:ISI-ST_MASTER_) and the 2 master switches are :ISI-ST_MASTER_SWITCHMON. All these signals were null at 19:50 UTC. This is not the case for the DAC channels (<IFO>-FEC_<DCU_ID>_DAC_OUTPUT_0_).

Failure_6.png shows the output channels of the ISI model and the DAC channels.

It seems that there are discrepancies between the ISI signals and the DAC signals.