Question:  Katrina Jane Edwards heading the Fe-Oxidizing Microbial Observatory Project on a seamount the top of which is?

Context paragraphs:
Constellation-X Observatory: The Constellation-X Observatory (HTXS or Con-X) was a mission concept for an X-ray space observatory to be operated by NASA; in 2008 it was merged with ESA and JAXA efforts in the same direction to produce the International X-ray Observatory project, announced on July 24, 2008.

Lōʻihi Seamount: Lōʻihi Seamount (also known as Loihi) is an active submarine volcano about 35 km off the southeast coast of the island of Hawaiʻi.  The top of the seamount is about 975 m below sea level.  This seamount is on the flank of Mauna Loa, the largest shield volcano on Earth.  Lōʻihi, meaning "long" in Hawaiian, is the newest volcano in the Hawaiian-Emperor seamount chain, a string of volcanoes that stretches over 5800 km northwest of Lōʻihi.  Unlike most active volcanoes in the Pacific Ocean that make up the active plate margins on the Pacific Ring of Fire, Lōʻihi and the other volcanoes of the Hawaiian-Emperor seamount chain are hotspot volcanoes and formed well away from the nearest plate boundary.  Volcanoes in the Hawaiian Islands arise from the Hawaiʻi hotspot, and as the youngest volcano in the chain, Lōʻihi is the only Hawaiian volcano in the deep submarine preshield stage of development.

Katrina Edwards: Katrina Jane Edwards (15 March 1968 - 26 October 2014) was a pioneering geomicrobiologist known for her studies of organisms living below the ocean floor, specifically exploring the interactions between the microbes and their geological surroundings, and how global processes were influenced by these interactions.  She spearheaded the Center for Dark Energy Biosphere Investigation (C-DEBI) project at the University of Southern California, which is ongoing.  Edwards also helped organize the deep biosphere research community by heading the Fe-Oxidizing Microbial Observatory Project on Loihi Seamount, and serving on several program steering committees involving ocean drilling.  Edwards taught at the Woods Hole Oceanographic Institute (WHOI) and later became a professor at the University of Southern California.

Jane Colebrook: Katrina Jane Weston (née Colebrook, formerly Finch; born 8 November 1957) is a former British middle distance runner who specialised in the 800 metres.  Competing as Jane Colebrook, she equalled the world indoor best to win at the 1977 European Indoor Championships and won a bronze medal at the 1978 Commonwealth Games.  Competing as Jane Finch, she won a silver medal at the 1985 World Indoor Games.

Mount Gargash: Mount Gargash is located in Isfahan Province in Iran near the town of Jowsheqan va Kamu.  The peak has an altitude of 3588 m and is the home for the Iranian National Observatory's 3.4m optical telescope.  The peak is chosen as the outcome of a site selection campaign for the national observatory project in 2008 and is known for its low atmospheric turbulence thus suitable for astronomical observations.  Mount Gargash is located in a protected zone for conservation of its wildlife.  A road opened to access the mountain in 2016.

X-ray Astronomy Recovery Mission: The X-ray Astronomy Recovery Mission (XARM, pronounced "charm") is an X-ray astronomy satellite project of the Japan Aerospace Exploration Agency (JAXA) to provide breakthroughs in the study of structure formation of the universe, outflows from galaxy nuclei, and dark matter.  It is a replacement for the failed X-ray astronomy mission Hitomi.  As the only international X-ray observatory project of its period, XARM will function as a next generation space telescope in the X-ray astronomy field, similar to how the James Webb Space Telescope, Fermi Space Telescope, and the ALMA Observatory are placed in their respective fields.  The mission will crosslink X-ray telescopes of the present (Chandra, XMM-Newton) with that of the future (ATHENA, Lynx/X-Ray Surveyor), thus preventing the formation of a blank period in X-ray astronomy in the early 2020s resulting from the loss of Hitomi.  During its formulation, XARM was also known as the "ASTRO-H Successor", "ASTRO-H2".

Robert Schommer: Robert A. Schommer (December 9, 1946 – December 12, 2001) was an American observational astronomer.  He was a professor at Rutgers University and later a project scientist for the U.S. office of the Gemini Observatory Project at the Cerro Tololo Inter-American Observatory (CTIO) in Chile.  He was known for his wide range of research interests, from stellar populations to cosmology.

Koko Guyot: Koko Guyot (also sometimes known as "Kinmei" and Koko Seamount) is a 48.1-million-year-old guyot, a type of underwater volcano with a flat top, which lies near the southern end of the Emperor seamounts, about 200 km north of the "bend" in the volcanic Hawaiian-Emperor seamount chain.  Pillow lava has been sampled on the north west flank of Koko Seamount, and the oldest dated lava is 40 million years old.  Seismic studies indicate that it is built on a 9 km thick portion of the Pacific Plate.  The oldest rock from the north side of Koko Seamount is dated at 52.6 and the south side of Koko at 50.4 million years ago.  To the southeast of the bend is Kimmei Seamount at 47.9 million years ago and southeast of it, Daikakuji at 46.7.

NEPTUNE: The NEPTUNE Ocean Observatory project is part of Ocean Networks Canada which is a University of Victoria initiative.  NEPTUNE is the world’s first regional-scale underwater ocean observatory that plugs directly into the Internet.  NEPTUNE is the largest installation on the Ocean Networks Canada network of ocean observatories.  Since December 2009, it has allowed people to "surf" the seafloor while ocean scientists run deep-water experiments from labs and universities around the world.  Along with its sister project, VENUS, NEPTUNE offers a unique approach to ocean science.  Traditionally, ocean scientists have relied on infrequent ship cruises or space-based satellites to carry out their research, while the NEPTUNE project uses a remotely operated crawler.

Nintoku Seamount: Nintoku Seamount or Nintoku Guyot is a seamount (underwater volcano) and guyot (flat top) in the Hawaiian-Emperor seamount chain.  It is a large, irregularly shaped volcano that last erupted 66 million years ago.  Three lava flows have been sampled at Nintoku Seamount; the flows are almost all alkalic (subaerial) lava.  It is 56.2 million years old.

Supporting paragraphs: Katrina Edwards Lōʻihi Seamount
Answer: about 975 m below sea level