List of Lock-Loss

Lock-Loss time

Recovery time

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

Recovery

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

Earthquake?(No earthquake information.human band vibration.)

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?(No earthquake information.human band vibration.#25486)

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

Earthquake?(No earthquake information.human band vibration.)

auto

#25493

2023-06-03 17:06

2023-06-03 18:12

Earthquake(18:17 M5.9 Gulf of Aden, 16:48 M4.5 Sarakhs, Iran)

auto

#25493

2023-06-03 19:38

2023-06-03 19:53

Earthquake(19:35 M4.9 Urakawa, Japan)

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

Earthquake(06:12 M3.0 Noto Peninsula, Japan)

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

2023-06-05 13:01

2023-06-05 16:01

Earthquake?(No earthquake information.human band vibration.) + manual(13:19 IPC glitch -> PR3 Alignment)

auto

#25514

2023-06-05 20:03

2023-06-05 20:23

unknown

auto

#25516

2023-06-06 02:27

2023-06-06 02:37

unknown

auto

#25518

2023-06-06 08:02

2023-06-06 15:54

Maintenance Day & PR3 Alignment

auto

#25534

2023-06-06 18:18

2023-06-06 18:33

Earthquake(18:37 M3.0 - Hida,Japan)

auto

#25539

2023-06-07 07:41

2023-06-07 08:14

Earthquake(06:43 M4.9 and 06:48 M5.2 - Vao, New Caledonia, 06:50 M4.4 Fiji)

auto

#25542

2023-06-07 13:57

2023-06-07 15:53

manual(IPC glitch -> PR3 Alignment)

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

#25547

2023-06-07 19:22

2023-06-07 19:32

Earthquake(18:53 M4.8 - 19km NW of Maubin, Myanmar)

auto

#25551

2023-06-08 13:52

2023-06-08 15:11

manual(IPC glitch -> PR3 Alignment)

auto

#25553

2023-06-08 21:50

2023-06-08 21:58

Earthquake(21:49 M3.2 - Noto Peninsula, Japan)

auto

#25558

2023-06-09 05:45

2023-06-09 06:39

Earthquake(05:31 M5.7 - Rat Islands, Aleutian Islands, Alaska)

auto

#25561

2023-06-09 13:14

2023-06-09 13:59

manual(IPC glitch -> PR3 Alignment)

auto

#25564

2023-06-09 20:46

2023-06-09 20:56

Earthquake(20:45 M3.8 - Noto Peninsula, Japan)

auto

#25568

2023-06-09 22:48

2023-06-09 23:06

Earthquake(22:48 M3.3 - Noto, Japan)

auto

#25568

2023-06-10 06:25

2023-06-10 06:38

Earthquake(06:21 M3.1 - Noto, Japan)

auto

#25569

2023-06-10 06:55

2023-06-10 07:08

Earthquake(06:21 M5.9 - Macquarie Island)

auto

#25569

2023-06-10 13:54

2023-06-10 14:48

manual(IPC glitch -> PR3 Alignment)

auto

#25570

2023-06-10 18:49

2023-06-10 19:27

Earthquake(18:12 M5.8 - 166km ENE of Labasa, Fiji)

auto

#25571

2023-06-11 01:02

2023-06-11 01:11

Earthquake(01:01 M3.3 - Noto, Japan)

auto

#25572

2023-06-11 01:22

2023-06-11 01:48

Earthquake(01:21 M4.1 - Northern Wakayama, Japan)

auto

#25572

2023-06-11 12:05

2023-06-11 12:42

Earthquake(11:58 M5.2 - Kuril Islands)

auto

#25575

2023-06-11 13:25

2023-06-11 14:53

manual(IPC glitch -> PR3 Alignment)

auto

#25575

2023-06-11 15:23

2023-06-11 15:34

Earthquake?(No earthquake information.human band vibration.)

auto

#25575

2023-06-11 18:56

2023-06-11 20:23

Earthquake(18:54 M6.2 Hokkaido, Japan)

auto

#25576

2023-06-11 22:34

2023-06-11 22:45

Earthquake(22:08 M5.8 west of Macquarie Island)

auto

#25576

2023-06-11 23:00

2023-06-11 23:29

Earthquake(22:08 M5.8 west of Macquarie Island(continuous vibration))

auto

#25576

2023-06-12 13:13

2023-06-12 14:15

manual(IPC glitch -> PR3 Alignment)

auto

#25582

2023-06-13 07:35

2023-06-13 07:52

Earthquake(07:32 M3.3 - Noto peninshura, Japan)

auto

#25584

2023-06-14 08:00

2023-06-14 15:22

Maintenance Day & PR3 Alignment

auto

#25598

2023-06-14 21:52

2023-06-14 22:33

Earthquake(21:30 M5.4 - Bismarck Sea)

auto

#25599

Category

Count (all)

Count (first half until 6/6 15:54)

Count (Second half from 6/6 15:54)

Earthquake

38/69(55%)

19/43(44%)

19/26(73%)

- Human band vibration

6/38(9%)

5/19(12%)

1/19(4%)

Unkown

16/69(23%)

16/43(37%)

0/26(0%)

Manual(PR3 Alignment)

12/69(17%)

6/43(14%)

6/26(23%)

Maintenance

3/69(4%)

2/43(5%)

1/26(4%)

Category

Count (all)

Count (first half until 6/6 15:54)

Count (Second half from 6/6 15:54)

Auto

62/69(90%)

36/43(84%)

26/22(100%)

manual

7/69(10%)

7/43(16%)

0/7(0%)

Shift(Time)

Earthquake

-Humanband vibration

Unkown

Manual

Maintenance

00:00 - 08:00

12

1

6

0

0

08:00 - 16:00

7

3

7

12

3

16:00 - 24:00

19

2

3

0

0

Shift(Time)

Auto

Manual

00:00 - 08:00

18/18

0/18

08:00 - 16:00

24/29

5/29

16:00 - 24:00

20/22

2/22