Member Since 1990
Harold J. Tobin
Professor, University of Washington Seattle
Professional Experience
University of Washington Seattle
Professor
2018 - Present
Education
University of California Santa Cruz
Doctorate
1995
Honors & Awards
Paul G. Silver Award for Outstanding Scientific Service
Received December 2018
Harold Tobin will receive the 2018 Paul G. Silver Award for Outstanding Scientific Service at AGU’s Fall Meeting 2018, to be held 10–14 December in Washington, D. C. The award is given annually to recognize a scientist who has made “outstanding contr...
Harold Tobin will receive the 2018 Paul G. Silver Award for Outstanding Scientific Service at AGU’s Fall Meeting 2018, to be held 10–14 December in Washington, D. C. The award is given annually to recognize a scientist who has made “outstanding contributions to the fields of geodesy, seismology, or tectonophysics through mentoring of junior colleagues, leadership of community research initiatives, or other forms of unselfish cooperation in research.”  
Citation

Harold Tobin recently became the new director of the Pacific Northwest Seismic Network (PNSN) at the University of Washington. Over the past 17 years, Harold has devoted the better part of his career to leading the Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE), to date the most ambitious initiative for earthquake study using ocean drilling.

Harold studies the subduction megathrust and fore arc through seismic imaging and deep drilling, but his interests encompass rock mechanics, fault mechanics, earthquake seismology, and field geology. His scientific vision, multidisciplinary knowledge, and great leadership qualities position him extremely well to lead a community initiative as ambitious and complex as NanTroSEIZE.

NanTroSEIZE faced unprecedented challenges. It not only needed to integrate knowledge of plate tectonics, seismology, structural geology, marine geology, hydrogeology, borehole physics, and many other fields, but also has had to push the limit of drilling and monitoring technology. Its success also depends on its leader’s ability to create and maintain a work environment that nurtures cooperation among scientists of all levels, across their vastly different cultural and scientific backgrounds.

Today, after numerous site surveys, 11 drilling and instrumentation expeditions, and a number of technological and funding crises, NanTroSEIZE has built a seafloor borehole transect accompanied by a monitoring network and is on its way to the final phase of drilling to the megathrust itself. It has generated a huge body of science by borehole sampling and monitoring and by stimulating associated research. A generation of young scientists grew up with NanTroSEIZE, motivated and trained to study great earthquakes and tsunamis in new ways. What Harold and his coleaders from Japan have accomplished together is truly remarkable.

The Paul Silver Award is the best way to recognize Dr. Harold Tobin’s outstanding contributions to the fields of seismology and tectonophysics through his “leadership in community research initiatives.”

—Kelin Wang, Geological Survey of Canada, Sidney, B. C.

Response
Thank you so much for this recognition, Kelin, which comes as a complete and humbling surprise to me. I learned early on in graduate school from the great Casey Moore that going for something big with a diverse team makes for the most exciting and fun science. I took that superb advice to heart, and it has made for a rich and rewarding career path. I have been lucky to get to be the “head cheerleader” for the more than 120 colleagues who have been part of NanTroSEIZE, many more than I can name here. But I particularly am grateful to Gaku Kimura, Greg Moore, Masa Kinoshita, Mike Underwood, Eiichiro Araki, Lisa McNeill, Michi Strasser, Kiyoshi Suyehiro, and, above all, Demian Saffer. Besides Casey, Mark Brandon and Eli Silver got me started in subduction zone research. Along the way, I’ve been very lucky to work with and learn from so many others, and I thank you all. Heartfelt thanks especially to all of my colleagues at New Mexico Tech and University of Wisconsin–Madison who supported my efforts in organizing big science even though it didn’t necessarily bring the big bucks back to the home institution. Former students Matthew Knuth, Tamara Jeppson, Susanna Webb, Sarah Bremmer, and many others have been phenomenal. Finally, none of what I have done would have been possible without the love and tolerance of my family, Mary Dwyer and Kira and Iris Tobin. Very soon we are headed out on International Ocean Discovery Program (IODP) Expedition 358 to try to finally reach our megathrust target. Meanwhile, in this new chapter of my career at Washington, the two “big science” hats I’m wearing—the PNSN and the SZ4D planning project—promise many more years of fun science working with dedicated and creative people. I couldn’t be more excited about the future. —Harold Tobin, University of Washington, Seattle
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Publications
Anomalous Sediment Consolidation and Alteration From Buried Incoming Plate Seamounts Along the Casca...

Oceanic plate seamounts are believed to play an important role in megathrust rupture at subduction zones, although consistent relationships between...

February 11, 2025
AGU Abstracts
Megathrust Step-down into Igneous Oceanic Crust at the Cascadia Subduction Zone and its Implications for Seismogenesis
INSIGHTS INTO THE CASCADIA SUBDUCTION ZONE: FROM FUNDAMENTAL SCIENTIFIC PROCESSES TO SOCIETAL RESILIENCE III POSTER
tectonophysics | 13 december 2024
Brian Boston, Suzanne M. Carbotte, Shuoshuo Han, B...
The stratigraphic location of a megathrust fault directly impacts the local frictional properties of the fault. The Cascadia Subduction Zone (CSZ) has...
View Abstract
Cascadia’s Landward Vergent Thrust Zone is the Product of Megathrust Locking and Co-seismic Slip to the Toe
INSIGHTS INTO THE CASCADIA SUBDUCTION ZONE: FROM FUNDAMENTAL SCIENTIFIC PROCESSES TO SOCIETAL RESILIENCE III POSTER
tectonophysics | 13 december 2024
Harold J. Tobin, Anna Ledeczi, Madeleine C Lucas
Unlike most accretionary wedges globally, the Cascadia subduction zone prominently features a region dominated by landward-vergent (LV) thrust sheets....
View Abstract
Piecing Together Forearc Basin Evolution and Earthquake Rupture Segmentation of the Cascadia Subduction Zone
INSIGHTS INTO THE CASCADIA SUBDUCTION ZONE: FROM FUNDAMENTAL SCIENTIFIC PROCESSES TO SOCIETAL RESILIENCE III POSTER
tectonophysics | 13 december 2024
Nipa Chakroborty, Brian Boston, Suzanne M. Carbott...
The Cascadia subduction zone is a prominent seismic risk for North America. A series of forearc basins are present for nearly the whole margin, but ou...
View Abstract
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