aLIGO LHO Logbook

H1 SEI (SEI)

corey.gray@LIGO.ORG - posted 06:07, Tuesday 13 December 2016 - last comment - 08:26, Tuesday 13 December 2016(32499)

Earthquake Report: 4.4 Gulf Of California? L1 lockloss, H1 remained UP

Noticed L1 dropping out of lock at around 13:42 & around this time noticed elevated noise on our EQ BLRMS signal (also notice it on LLO EQ band screenshots). Nothing observed on Terramon or USGS website (and other websites). I did notice a 4.4 in Baja California here: http://www.emsc-csem.org/Earthquake/earthquake.php?id=552372

Not reported on Terramon or USGS site. Observed on our 0.03-0.1Hz BLRMS at 0.2um/s (saw possible posting on emsc-csem.org)
Magnitude: 4.4
Location: Gulf of California
Starting time of event: Observed on BLRMS at 13:41utc (emsc-csem.org reports eq at 13:27utc)
Lock status? H1 remained locked (L1 broke lock)
Not reported on Terramon as of 14:02utc

Comments related to this report

corey.gray@LIGO.ORG - 08:26, Tuesday 13 December 2016 (32506)

Link

Noticed Terramon finally reported this earthquake. But it must have been 1-2hrs after we saw it on our seismometers.