Date
(July 2009)
|
Local time
(h)
|
Operation details
|
|
21
|
1843
|
Synchronization test between Kairei and Chikyu. Kairei transmitted radio synchronization signals to Chikyu every 40 s.
|
|
23
|
|
Kairei deployed 8 OBSs: four at 3.5 km and four at 0.5 km distance from Hole C0009A. OBS recording started at 1800 h on 23 July and stopped at 0900 h JST on 1 August.
|
|
24
|
1330
|
Kairei deployed air gun array. Kairei tested signature of air gun waveform at 180 mbsl, and stand-by for Chikyu.
|
|
25
|
0500
|
Start connection of VSI tools. 20 seismometers.
|
|
25
|
0730
|
Lower tools and checked caliper.
|
|
25
|
1025
|
Short circuit occurred in the VSI tool. Released arms and start pulling back at 1030 h.
|
|
25
|
1647
|
Changed the number of seismometers to 16.
|
|
25
|
2010
|
Change anchoring depth to 2975.0 m DRF. All 16 seismometers anchored at 2017 h.
|
|
25
|
2018
|
First shot recorded for Line 1. File 008, Shot 12287.
|
|
26
|
0311
|
Kairei 1 nmi from Chikyu. Start to deviate from survey line (Shot 11915, File 376).
|
|
26
|
0327
|
Kairei 1 nmi from Chikyu. Resume to line. (Shot 11864, File 427).
|
|
26
|
0405
|
Start circle shooting at 3.5 km from Hole C0009A. Shot on time at 30 s interval.
|
|
26
|
0632
|
Finish circle shooting.
|
|
26
|
0713
|
Restart Line 1 shooting. Shot 11845.
|
|
26
|
1100
|
Kairei shooting finished at 29.3 km from Chikyu. End of walkaway VSP survey.
|
|
|
|
Zero-offset VSP experiment.
|
|
26
|
1611
|
Start zero-offset VSP.
|
|
26
|
1620
|
Discover that Seismometers 9 and 10 do not work.
|
|
|
|
Run zero-offset VSP with 8 seismometers.
|
|
26
|
1916
|
POOH VSI tools.
|
|
27
|
0100
|
Finish rig down.
|