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Official Journal of the Asia Oceania Geosciences Society (AOGS)

Table 1 Scope of work and dates of each survey leg

From: Discovery of a conical feature in Halmahera waters, Indonesia: traces of a late-stage hydrothermal activity

Survey leg

Scope of work

Dates

Survey duration (days)

Data volume

Leg 1

Multibeam bathymetry survey, surface-towed magnetic survey over the object of interest

13 to 23 Aug 2021

9

Bathymetry: ~ 1000 km

Magnetic: ~ 15 km

Leg 2

Multibeam bathymetry survey (continued from Leg 1), grab sampling

28 Aug to 7 Sept 2021

9

Bathymetry: ~ 1000 km

Grab sampling: 4 trials, 1 successful

Leg 3

Multibeam bathymetry survey (continued from Leg 2)

12 to 21 Sept 2021

8

Bathymetry: ~ 1000 km