Member Since 1986
Jon J. Major
Research Hydrologist, USGS Cascades Volcano Observatory
AGU Research
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Topographic and climatic controls on the fluvial erosion of volcanic debris avalanches: implications for the persistence of downstream sedimentation hazards
CASCADING HAZARDS: LINKING PROCESSES ACROSS EARTH’S SURFACE I ORAL
earth and planetary surface processes | 12 december 2023
Kristin Sweeney, Jon J. Major
Post-eruption landscapes are some of the fastest eroding terrains in the world, having watershed-scale erosion rates regularly on the order of per yea...
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Cascading Hazards from Explosive Volcanic Eruptions—What Do We Know and Where Might We Go?
CASCADING HAZARDS: LINKING PROCESSES ACROSS EARTH’S SURFACE I ORAL
earth and planetary surface processes | 12 december 2023
Jon J. Major
Explosive volcanic eruptions can directly trigger large debris avalanches, pyroclastic density currents (PDCs), and tephra fall. These volcanic proces...
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Can Lava Flow Like Water? Assessing Applications of Critical Flow Theory to Channelized Basaltic Lava Flows
JOURNAL OF GEOPHYSICAL RESEARCH: EARTH SURFACE
04 september 2022
Hannah R. Dietterich, Gordon E. Grant, Becky Fasth...
Flowing lava and water have dramatically different physical properties but can form similar hydraulic structures, including undular hydraulic jumps...
USGS Volcano Science Center URGE sub-pod: Actions towards a more inclusive and diverse workplace
UNLEARNING RACISM IN GEOSCIENCE: PART 1
innovations | 15 december 2021
Andria P. Ellis, Seth C. Moran, Laura E. Clor, Dav...
Federal research organizations share the same systemic inequities commonly found in academic institutions. To address these concerns, six pods assembl...
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Effective Hydrological Events in an Evolving Mid‐latitude Mountain River System Following Cataclysmic Disturbance—A Saga of Multiple Influences
WATER RESOURCES RESEARCH
08 february 2021
Jon J. Major, Kurt R. Spicer, Adam R. Mosbrucker
Cataclysmic eruption of Mount St. Helens (USA) in 1980 reset 30 km of upper North Fork Toutle River (NFTR) valley to a zero‐state fluvia...
Effective hydrological events in an evolving mid-latitude mountain river system following cataclysmic disturbance—a saga of multiple influences
FLOW, TRANSPORT, AND MORPHOLOGY: LINKAGES BETWEEN EROSION, TRANSPORT, DEPOSITION, AND MORPHOLOGY ACROSS SCALES IV POSTERS
earth and planetary surface processes | 08 december 2020
Jon J. Major, Kurt R. Spicer, Adam R. Mosbrucker
A 2.5 km3 landslide at Mount St. Helens (USA) reset 30 km of upper North Fork Toutle River valley to a zero-state fluvial condition in 1980. Consequen...
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Fine-time-scale DEM analysis illuminates long-term geomorphic legacy of 1980 Mount St. Helens eruption in North Fork Toutle River watershed
VOLCANIC ERUPTIONS II: FORECASTING, RESPONSE, AND HAZARDS III POSTERS
volcanology, geochemistry and petrology | 10 december 2019
Jon J. Major, Kristin Sweeney, Adam R. Mosbrucker,...
The 18 May 1980 eruption of Mount St. Helens reset the fluvial landscape of upper North Fork Toutle River (NFTR) valley. A massive landslide deposit f...
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Multidecadal Geomorphic Evolution of a Profoundly Disturbed Gravel Bed River System-A Complex, Nonlinear Response and Its Impact on Sediment Delivery
JOURNAL OF GEOPHYSICAL RESEARCH: EARTH SURFACE
27 may 2019
Jon J. Major, Shan ZHENG, Adam R. Mosbrucker, Kurt...
A 2.5‐km3 debris avalanche during the 1980 eruption of Mount St. Helens buried upper North Fork Toutle River valley and reset the fluvial lan...