List of Lock-Loss

Lock-Loss time

Recovery time

Cause(Earthquake, IPC glitch, etc...)

Recovery (auto:21/28(75.0%))

K-Log#

2023-05-25 00:58

2023-05-25 01:45

Earthquake(00:49 M6.2 - Banda Sea)

auto

#25369

2023-05-25 06:49

2023-05-25 07:05

unknown

auto

#25369

2023-05-25 09:49

2023-05-25 10:43

unknown

auto

#25375

2023-05-25 10:56

2023-05-25 11:55

unknown & PR3 Alignment

auto

#25375

2023-05-25 12:26

2023-05-25 19:22

Earthquake(12:05 M6.5 - Puerto Obaldía, Panama)

auto

#25370(It has been DOWN repeatedly several times.)

2023-05-25 22:53

2023-05-25 23:48

Earthquake(22:48 M5.2 - Basco, Philippines)

auto

#25381

2023-05-26 05:56

2023-05-26 06:15

unknown

auto

#25384

2023-05-26 11:07

2023-05-26 12:52

unknown & PR3 Alignment

#25387GRXtrans power suddenly droped

#25391

2023-05-26 14:04

2023-05-26 14:11

unknown

auto

#25391

2023-05-26 19:04

2023-05-26 21:28

Earthquake(21:01 M4.6 14km SSE of Asahi,Japan)

VIS tripped#25393, Difference in SDF#25394,#25395

#25397

2023-05-27 02:41

2023-05-27 03:22

unknown

auto

#25398

2023-05-27 09:32

2023-05-27 09:47

unknown

auto, #25399:GRY was recovered to TEM00 mode

#25406

2023-05-27 15:51

2023-05-27 19:15

unknown & PR3 Alignment

#25409:RESET_ASC_FEEDBACK(4) in the LSC_LOCK Guardian failed after PR3 alignment work

#25410

2023-05-27 22:57

2023-05-27 23:17

Earthquake(22:52 M4.8 Tokara Island (57km WSW of kurio, Japan))

auto

#25410

2023-05-28 11:41

2023-05-28 12:00

unknown

auto

#25416

2023-05-28 14:02

2023-05-28 15:50

manual(IPC glitch -> PR3 Alignment)

SDF diffs #25415 SDF state didn't change to 1 even in LSC_LOCK=OBSERVATION

#25416

2023-05-29 13:21

2023-05-29 15:43

unknown(Locked for 21h hours.)

#25431 OMC cannot be locked and found that GRY was locked

#25429

2023-05-30 08:01

2023-05-30 14:54

Maintenance Day & PR3 Alignment

auto

#25449

2023-05-30 17:49

2023-05-30 18:29

Earthquake(17:49 M4.5 Noto Peninsula, Japan)

VIS tripped

#25456

2023-05-31 04:07

2023-05-31 04:23

Earthquake(04:06 M2.8 Hida, Japan)

auto, #25461 Audio message from IFO guardian

#25457

2023-05-31 11:45

2023-05-31 12:45

Earthquake(11:21 M 6.2 - Auckland Islands, New Zealand)

auto

#25463

2023-05-31 14:40

2023-05-31 15:44

manual(IPC glitch -> PR3 Alignment)

SDF diffs#25462

#25463

2023-05-31 20:33

2023-05-31 21:45

unknown

auto

#25465

2023-05-31 23:15

2023-06-01 00:31

Earthquake(23:01 M5.5 - off the east coast of the Kamchaka Peninsula, Russia)

auto

#25465,#25467

2023-06-01 14:21

2023-06-01 15:54

manual(IPC glitch -> PR3 Alignment)

auto(Manual operation by Ushiba-san was also conducted.)

#25478

2023-06-02 02:55

2023-06-02 03:10

Earthquake(02:55 M2.8 - Hida,Japan)

auto

#25480

2023-06-02 07:49

2023-06-02 08:00

Due to vibration(No earthquake information)

auto

#25480

2023-06-02 13:44

2023-06-02 15:12

manual(IPC glitch -> PR3 Alignment)

auto

#25485

2023-06-02 17:07

2023-06-02 17:17

Earthquake?

auto

#25487

2023-06-03 13:58

2023-06-03 15:23

manual(IPC glitch -> PR3 Alignment)

auto

#25490

2023-06-03 16:40

2023-06-03 17:01

unknown

auto

#25493

2023-06-03 17:06

2023-06-03 18:12

unknown

auto

#25493

2023-06-03 19:38

2023-06-03 19:53

unknown

auto

#25493

2023-06-04 01:57

2023-06-04 02:12

unknown

auto

#25495

2023-06-04 06:13

2023-06-04 06:28

unknown

auto

#25495

2023-06-04 10:59

2023-06-04 11:22

Earthquake(10:58 M4.6 - Chiba,Japan)

auto

#25496

2023-06-04 14:16

2023-06-04 15:12

manual(IPC glitch -> PR3 Alignment)

auto

#25496

2023-06-04 20:21

2023-06-04 20:42

unknown

auto

#25502

2023-06-05 03:19

2023-06-05 03:30

unknown

auto

#25503