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November

  • Day: 15

  • 11.13.2025

    Location: At C0027E

  • daily photo

SD-RCB coring is ongoing! Co-chief Hiroko Kitajima (TAMU) was able to drop the inner coring barrel on the rig floor!

  • Day: 14

  • 11.12.2025

    Location: At C0027E

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We ran SD-RCB assembly, spud-in & washed down, and started coring. Drilling team and scientists discussing the next coring plan while the 1st SD-RCB core on deck.

  • Day: 13

  • 11.11.2025

    Location: At C0027D, C0027E

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After our daily morning video conference with the Co-Chief Scientists, the drilling & support teams onshore, we discussed our future coring plans. Before noon, the day & night shift scientists handed over their work, & the area around the recording table was lively.

  • Day: 12

  • 11.10.2025

    Location: At C0027D

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We completed HPCS/ESCS coring with exciting 9 cores from C0019D,and are currently moving on to preparation of SD-RCB coring.
L: The cutting shoe that came back completely smooth and shiny. R: Structural geology members are working on VCD.

  • Day: 11

  • 11.09.2025

    Location: At C0027D

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We recovered the first core of this expedition and the IODP3 expedition by Chikyu! Cores have been coming up every 2–3 hours, and the scientists are keeping busy.

  • Day: 10

  • 11.08.2025

    Location: At C0027D

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We completed the logging operation and moved on to the HPCS coring.
Beautiful rainbow looks like celebrating the completion of our logging operation and cheering for upcoming coring.

  • Day: 9

  • 11.07.2025

    Location: At C0027C

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Co-chiefs and logging scientists discussing actively over the preliminary logging data. Scientists enjoyed ship tour during breaks in works.

  • Day: 8

  • 11.06.2025

    Location: At C0027C

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We are currently waiting to receive the "rush print" data. In the lab, day shift scientists attended a lecture about sample registration in J-CORES. We also held a live broadcast with a local Japanese high school.

  • Day: 7

  • 11.05.2025

    Location: At C0027C

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Immediately after operations began, drilling was difficult because of the poor weather conditions & the hardness of the target formation, but even so, we could make progress in the hole.

  • Day: 6

  • 11.04.2025

    Location: At C0027C

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Thanks to the logging staff, Scientists could see the actual logging tools to be used & could also visit the rig floor during pipe lifting operations! Scientists crowded up the space, so were sad when asked to leave! Like herding cats!

  • Day: 5

  • 11.03.2025

    Location: At C0027C

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Starting today, inductions have begun in the lab. It's great to see the lab bustling with scientists! The MWJ curator gives a sampling lecture (L); The lithology team discusses the legends to use in describing cores with the naked eye (R).

  • Day: 4

  • 11.02.2025

    Location: At C0027C

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Update from the drill floor! Spudded-in at Hole C0027C, washed down to 56 mbsf & started/continued drilling to 78 mbsf. Scientists talk about their observations while monitoring the drilling parameters in real time.

  • Day: 3

  • 11.01.2025

    Location: At C0027C

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The ship is rocking from the strong winds and swell today, so work will begin at 2100 hrs when the weather calms down. Scientists had team leaders' meetings mainly discussing report writing.

October

  • Day: 2

  • 10.31.2025

    Location: Continue sailing to Hole C0027

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Co-chief Asuka Yamaguchi give a presentation on the IODP3 Exp.502 scientific objectives to the crew at the pre-spud meeting. The EPM led a lab safety tour for the onboard Scientists.

  • Day: 1 part 2

  • 10.30.2025

    Location: Continue sailing to Hole C0027

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IODP3 Expedition 502 now starts! Chikyu left the quay of Sendai port on time & the scientists departed with a warm send-off. On the drilling floor, testing & checking of mud motors & wireline logging equipment goes on as the crew prepare for drilling.

  • Day: 1 part 1

  • 10.30.2025

    Location: At Sendai port

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Chikyu departed from Sendai Port at 16:15 as scheduled. IODP3 Expedition 502 plans to explore the nature of the acoustic basement in the outer rise area of the NW Pacific subduction system. Read more.