May 10, 2017, 3:30 p.m.
Building 34, Room W150 -
PLEASE NOTE CHANGE OF LOCATION DUE TO RENOVATION OF
BUILDING 3 AUDITORIUM and unavailability of Building 8.
OREGON STATE UNIVERSITY
"Fire in the Deep Sea: The
2015 Eruption of Axial Seamount"
Axial Seamount is the most
active submarine volcano in the NE Pacific. It is a basaltic
hotspot volcano superimposed on the Juan de Fuca Ridge spreading
center, so has an enhanced magma supply. It has been the focus
of a seafloor observatory for over 20 years, first with
autonomous, battery-powered instruments, and since September
2014 by instruments connected to a fiber-optic cable to shore
providing continuous real-time data, part of the NSF-funded
Ocean Observatories Initiative. Axial has had three detected
eruptions in 1998, 2011, and the latest in April 2015 (detected
in real-time by the cabled observatory). This talk will
summarize over 2 decades of monitoring efforts at Axial
Seamount, highlighting new insights gained during the 2015
About the Speaker:
Dr. Bill Chadwick is a Research Professor at Oregon State
University’s Hatfield Marine Science Center in Newport, Oregon,
and is acting-head of NOAA Earth-Ocean Interactions Program at
the Pacific Marine Environmental Laboratory. He became
interested in studying volcanoes when he was in college and
Mount St. Helens erupted. He majored in geology at Colorado
College, where he received his B.A. After college, he worked at
Mount St. Helens with the U.S. Geological Survey for 2 years,
and he’s been hooked on studying active volcanoes ever since.
After the USGS, he got a PhD in Geology at University of
California at Santa Barbara, did a post-doc with the USGS in
Menlo Park after that studying Galapagos volcanoes, and has
worked at Oregon State University since 1989 mainly studying
His current research interests include investigating how magma
is supplied and stored at active volcanoes, how lava is emplaced
during submarine eruptions, and how underwater eruptions affect
the chemistry and ecosystems of hydrothermal vent sites. His
research uses high-resolution mapping of the seafloor with
multibeam sonars on autonomous underwater vehicles, visual
observations of the seafloor from remotely operated vehicles,
and monitoring of volcanic processes using seafloor instruments.
He is particularly interested in seafloor geodesy (measuring
volcanic deformation) and what that can tell us about magma
movements in the subsurface at submarine volcanoes.
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