Priority:

Alternate

Position:

~37°56.3528′N, 143°54.5075′E  

Water depth (m):

6830

Target drilling depth (mbsf):

~1100

Survey coverage (track map; seismic profile):

Lines HD33B and HS40B; Figure F1B

Objective:

Determine stress state on the fault

Characterize large earthquakes in the fault zone

Drilling program:

Hole A: LWD to ~950 mbsf; install casing/​temperature monitoring string to ~950 mbsf

Hole B: RCB to ~950 mbsf; install casing/​temperature and pressure monitoring string to ~850 mbsf

Logging/downhole measurements program:

Hole A: LWD⁄MWD to ~950 mbsf

LWD: resistivity, electrical imaging, gamma ray

MWD: annular pressure while drilling, temperature

Nature of rock anticipated: