Hawaii
21.9 N, 160.1W
summit elevation 391 m
Shield volcano
Niihau is privately owned and access is restricted.
Niihau volcano is notable for the dike swarm exposed on the east coast.
Further reading
Moore, James G., et al. "Prodigious submarine landslides on the Hawaiian Ridge." Journal of Geophysical Research: Solid Earth 94.B12 (1989): 17465-17484.
Doell, R.R., 1972. Paleomagnetism of volcanic rocks from Niihau, Nihoa, and Necker islands, Hawaii. Journal of Geophysical Research, 77(20), pp.3725-3730.
400,000 years ago