Noticed Diag_Main message for "Seismon system not updating" at around 16:47. (Opening up the DIAG_MAIN node's Log, this message came out at 15:36utc (or 36min after Jim's shift ended).
Jim mentioned that we do not have an action to restart Seismon (he needs to get with Dave B. for troubleshooting).
Now on the Seismon medm, the Keep Alive is still flashing, and I don't see any notes on it about NO Updating.
Not sure when it went away, but No longer have the "Seismon system not updating" message, and it looks like we've had a few earthquakes post since having the message earlier this morning. ("Keep Alive" continues to flash.)
There are a several ways Seismon can die, the keep alive only tells you about one of them. The diag_main test looks at the system time (what gps time the front thinks it is ( I think)). This clock stops under different conditions than the keep alive, but is also subject to temporary freezes, not sure of the cause. The diag main test looks for the seismon system time to be a minute or more out of sync with another front end ( I think LSC). There is also a light on the "compact" seismon screen that comes on if the difference is greater than 5 seconds, this should have been on when Corey looked, if he was looking at the compact screen.