edmond.merilh@LIGO.ORG - posted 15:49, Wednesday 15 March 2017 - last comment - 16:50, Wednesday 15 March 2017(34854)
Earthquake Report: 5.4 Alaska
EQ seen at:
USGS: Listed as occurring at 19:43UTC
Seis BLRMS: ~22:41utc (peaked at 0.4um/s for 0.03-0.1Hz)
Terramon: Not sure when this posted, but it was at/before arrival time of 3:30utc
Tidal signals start seeing around 22:37utc
Magnitude: 5.4
Location: Semisopochnoi Island, Alaska
Start time: 3:30utc
Lock Status: Lockloss
H1 & L1 eventually lost lock.
I've attached a plot showing the ETMY seismometer Z signal and a proxy for the interferometer's lock state. Looks like the lockloss happened a few minutes after the peak of the ground motion, which might suggest they are not related. It would be helpful to look at a lockloss plot to assess if this earthquake was responsible or not.