15:41 UTC Joe D. called from VPW. Turning on a couple of water pumps and a water tap.
16:32 UTC lockloss, earthquake, either 5.4 in Northern Mid-Atlantic Ridge (15:59:42 UTC) or 4.5 63km W. of Ovalle, Chile (15:58:37 UTC)
16:36 UTC Reset OMC SUS WD
ALS is not staying locked, still riding out earthquake
16:46 UTC Kyle and Gerardo leaving control room to start replacement of ion pump at mid Y (WP 5500)
16:52 UTC Attempting to lock DRMI
16:56 UTC Richard reports he turned on AC for LDAS room in staging building, it had not been on
16:58 UTC Locked DRMI, lost DRMI lock, but guardian did not go to down, continued to attempt to lock DRMI
17:00 UTC Kyle and Gerardo at mid Y
17:16 UTC Searching for ALS DIFF IR resonance by hand
17:18 UTC Done searching for IR resonance by hand, the peak went by on the strip tool, but guardian says it is moving on. I guess it caught it.
17:32 UTC Back to Low Noise. Seismic 0.03-0.1 Hz band is around 10^-1 um/s.
17:38 UTC Back to Observing. Range is low ~ 54 MPc.
17:43 UTC Kyle reports seeing a helicopter flying low over mid Y about 5 minutes ago.
Range seems to be rising as seismic comes down.
18:52 UTC Kyle and Gerardo back. Ion pump has been replaced. Aux cart attached to new ion pump left running. They left mid Y at 18:40 UTC.