Darcy K. McPhee, PhD. (Former Employee)
Science and Products
Great Lakes Geologic Mapping Coalition (GLGMC)
The Great Lakes Geologic Mapping Coalition (GLGMC) advances the understanding of the three-dimensional distribution of the glacial, periglacial, and proglacial sediments that overlie the bedrock of the glaciated terrain of the Great Lakes Region. This region includes 8 U.S. States (Illinois, Indiana, Michigan, Minnesota, New York, Ohio, Pennsylvania, and Wisconsin) and the Canadian Province of...
STATEMAP
Through the STATEMAP component of the NCGMP, state partners are developing a national geologic framework driven by areas of economic, social, or scientific interest. STATEMAP mapping priorities are established by State Geological Surveys in consultation with a multi-representational State Mapping Advisory Committee. These priorities are based on multiple factors including a) state requirements for...
EDMAP
As the educational component of the National Cooperative Geologic Mapping Program (NCGMP), EDMAP funds universities to train the next generation of geologic mappers. EDMAP is a mentor-guided program designed to teach students geologic mapping techniques through rigorous field mapping. Colleges and universities in the U.S. and its territories are eligible to apply through an annual competitive...
Filter Total Items: 26
USGS critical minerals review USGS critical minerals review
No abstract available.
Authors
Graham Lederer, James Jones, Darcy McPhee, Patricia J Loferski, Robert Seal, Paul Bedrosian, Patricia Macqueen, V. Grauch, Federico Solano, Joshua Rosera, David Pineault
Annual review 2023: Critical minerals Annual review 2023: Critical minerals
No abstract available.
Authors
Graham Lederer, James Jones, Darcy McPhee, Jeffrey Mauk, Robert R. Seal,, Kate Campbell, Jane Hammarstrom, Paul Bedrosian, Patricia Macqueen, Garth Graham, Federico Solano, George Case, David Pineault
Renewing the National Cooperative Geologic Mapping Program as the Nation’s authoritative source for modern geologic knowledge Renewing the National Cooperative Geologic Mapping Program as the Nation’s authoritative source for modern geologic knowledge
This document presents the renewed vision, mission, and goals for the National Cooperative Geologic Mapping Program (NCGMP). The NCGMP, as authorized by the National Cooperative Geologic Mapping Act of 1992 (Public Law 102-285, 106 Stat. 166 and its reauthorizations), is tasked with expediting the production of a geologic database for the Nation based on modern geologic maps and their...
Authors
John Brock, Karen Berry, James Faulds, Richard Berg, Kyle House, Michael Marketti, Darcy McPhee, Kevin Schmidt, James Schmitt, David Soller, David Spears, Ren Thompson, Harvey Thorleifson, Gregory Walsh
Assessment of a claimed ultra-low frequency electromagnetic (ULFEM) earthquake precursor Assessment of a claimed ultra-low frequency electromagnetic (ULFEM) earthquake precursor
The rate of occurrence of anomalous ultra-low frequency electromagnetic (ULFEM) pulses has been claimed to have increased days to weeks prior to the M5.4 2007 and M4.0 2010 Alum Rock earthquakes. We re-examine the previously reported ultra-low frequency (ULF: 0.01–10 Hz) magnetic data recorded at a QuakeFinder site located 9 km from the earthquake hypocentre, and compare to data from a...
Authors
Can Wang, Lilianna Christman, Simon Klemperer, Jonathan Glen, Darcy McPhee, Chen Bin
U.S. Geological Survey STATEMAP Program—Geologic mapping for the public good U.S. Geological Survey STATEMAP Program—Geologic mapping for the public good
As of 2020, STATEMAP has invested more than $150 million in 48 State geological surveys, matched dollar for dollar, to complete geologic mapping projects crucial to the health and security of State natural resources and residents. For more information about STATEMAP and other geologic mapping efforts supported by the National Cooperative Geologic Mapping Program, visit https://ncgmp.usgs...
Authors
Abby Ackerman, Darcy McPhee
U.S. Geological Survey EDMAP Program—Training the next generation of geologic mappers U.S. Geological Survey EDMAP Program—Training the next generation of geologic mappers
Detailed geologic maps are the basis of nearly every Earth-science investigation and can be used for natural hazard mitigation, resource identification and exploration, infrastructure planning, and more. A component of the congressionally mandated National Cooperative Geologic Mapping Program, EDMAP is a partnership among the U.S. Geological Survey, the Association of American State...
Authors
Abby Ackerman, Darcy McPhee
Santa Rosa's past and future earthquakes Santa Rosa's past and future earthquakes
Santa Rosa is no stranger to earthquakes. This northern California city was damaged several times in the late 19th and early 20th centuries by shaking from earthquakes, culminating in the devastating earthquake of 1906, whose rupture passed 20 miles to the west of the city on the San Andreas Fault. Then in 1969, Santa Rosa was again strongly shaken and buildings were damaged by a pair of...
Authors
Suzanne Hecker, Darcy McPhee, Victoria E. Langenheim, Janet T. Watt
Three-dimensional electrical resistivity model of the hydrothermal system in Long Valley Caldera, California, from magnetotellurics Three-dimensional electrical resistivity model of the hydrothermal system in Long Valley Caldera, California, from magnetotellurics
Though shallow flow of hydrothermal fluids in Long Valley Caldera, California, has been well studied, neither the hydrothermal source reservoir nor heat source has been well characterized. Here a grid of magnetotelluric data were collected around the Long Valley volcanic system and modeled in 3-D. The preferred electrical resistivity model suggests that the source reservoir is a narrow...
Authors
Jared Peacock, Margaret Mangan, Darcy McPhee, Phil Wannamaker
Imaging the magmatic system of Mono Basin, California with magnetotellurics in three--dimensions Imaging the magmatic system of Mono Basin, California with magnetotellurics in three--dimensions
A three–dimensional (3D) electrical resistivity model of Mono Basin in eastern California unveils a complex subsurface filled with zones of partial melt, fluid–filled fracture networks, cold plutons, and regional faults. In 2013, 62 broadband magnetotelluric (MT) stations were collected in an array around southeastern Mono Basin from which a 3D electrical resistivity model was created...
Authors
Jared Peacock, Margaret Mangan, Darcy McPhee, David Ponce
Summer of Applied Geophysical Experience (SAGE): Training for our future geoscientists Summer of Applied Geophysical Experience (SAGE): Training for our future geoscientists
Energy and natural resources are crucial to the sustainability of worldwide economies, security, and overall well-being. However, the future workforce in the energy and natural-resources sector is at risk, and meeting the challenges of this dwindling workforce requires well-educated geoscientists in exploration and applied geophysics and related geoscience and technology disciplines...
Authors
W.S. Baldridge, Paul Bedrosian, Shawn Biehler, L.W. Braile, John Ferguson, Matthew Folsom, G.R. Jiracek, Shari Kelley, Darcy McPhee, Louise Pellerin, Catherine Snelson
Eruptions at Lone Star geyser, Yellowstone National Park, USA: 2. Constraints on subsurface dynamics Eruptions at Lone Star geyser, Yellowstone National Park, USA: 2. Constraints on subsurface dynamics
We use seismic, tilt, lidar, thermal, and gravity data from 32 consecutive eruption cycles of Lone Star geyser in Yellowstone National Park to identify key subsurface processes throughout the geyser's eruption cycle. Previously, we described measurements and analyses associated with the geyser's erupting jet dynamics. Here we show that seismicity is dominated by hydrothermal tremor (~5...
Authors
Jean Vandemeulebrouck, Robert Sohn, Maxwell L. Rudolph, Shaul Hurwitz, Michael Manga, Malcolm Johnston, S. Adam Soule, Darcy McPhee, Jonathan M. G. Glen, Leif Karlstrom, Fred Murphy
Structural controls on geothermal circulation in Surprise Valley, California: A re-evaluation of the Lake City fault zone Structural controls on geothermal circulation in Surprise Valley, California: A re-evaluation of the Lake City fault zone
Faults and fractures play an important role in the circulation of geothermal fluids in the crust, and the nature of that role varies according to structural setting and state of stress. As a result, detailed geologic and geophysical mapping that relates thermal springs to known structural features is essential to modeling geothermal systems. Published maps of Surprise Valley in...
Authors
Anne E. Egger, Jonathan Glen, Darcy McPhee
Science and Products
Great Lakes Geologic Mapping Coalition (GLGMC)
The Great Lakes Geologic Mapping Coalition (GLGMC) advances the understanding of the three-dimensional distribution of the glacial, periglacial, and proglacial sediments that overlie the bedrock of the glaciated terrain of the Great Lakes Region. This region includes 8 U.S. States (Illinois, Indiana, Michigan, Minnesota, New York, Ohio, Pennsylvania, and Wisconsin) and the Canadian Province of...
STATEMAP
Through the STATEMAP component of the NCGMP, state partners are developing a national geologic framework driven by areas of economic, social, or scientific interest. STATEMAP mapping priorities are established by State Geological Surveys in consultation with a multi-representational State Mapping Advisory Committee. These priorities are based on multiple factors including a) state requirements for...
EDMAP
As the educational component of the National Cooperative Geologic Mapping Program (NCGMP), EDMAP funds universities to train the next generation of geologic mappers. EDMAP is a mentor-guided program designed to teach students geologic mapping techniques through rigorous field mapping. Colleges and universities in the U.S. and its territories are eligible to apply through an annual competitive...
Filter Total Items: 26
USGS critical minerals review USGS critical minerals review
No abstract available.
Authors
Graham Lederer, James Jones, Darcy McPhee, Patricia J Loferski, Robert Seal, Paul Bedrosian, Patricia Macqueen, V. Grauch, Federico Solano, Joshua Rosera, David Pineault
Annual review 2023: Critical minerals Annual review 2023: Critical minerals
No abstract available.
Authors
Graham Lederer, James Jones, Darcy McPhee, Jeffrey Mauk, Robert R. Seal,, Kate Campbell, Jane Hammarstrom, Paul Bedrosian, Patricia Macqueen, Garth Graham, Federico Solano, George Case, David Pineault
Renewing the National Cooperative Geologic Mapping Program as the Nation’s authoritative source for modern geologic knowledge Renewing the National Cooperative Geologic Mapping Program as the Nation’s authoritative source for modern geologic knowledge
This document presents the renewed vision, mission, and goals for the National Cooperative Geologic Mapping Program (NCGMP). The NCGMP, as authorized by the National Cooperative Geologic Mapping Act of 1992 (Public Law 102-285, 106 Stat. 166 and its reauthorizations), is tasked with expediting the production of a geologic database for the Nation based on modern geologic maps and their...
Authors
John Brock, Karen Berry, James Faulds, Richard Berg, Kyle House, Michael Marketti, Darcy McPhee, Kevin Schmidt, James Schmitt, David Soller, David Spears, Ren Thompson, Harvey Thorleifson, Gregory Walsh
Assessment of a claimed ultra-low frequency electromagnetic (ULFEM) earthquake precursor Assessment of a claimed ultra-low frequency electromagnetic (ULFEM) earthquake precursor
The rate of occurrence of anomalous ultra-low frequency electromagnetic (ULFEM) pulses has been claimed to have increased days to weeks prior to the M5.4 2007 and M4.0 2010 Alum Rock earthquakes. We re-examine the previously reported ultra-low frequency (ULF: 0.01–10 Hz) magnetic data recorded at a QuakeFinder site located 9 km from the earthquake hypocentre, and compare to data from a...
Authors
Can Wang, Lilianna Christman, Simon Klemperer, Jonathan Glen, Darcy McPhee, Chen Bin
U.S. Geological Survey STATEMAP Program—Geologic mapping for the public good U.S. Geological Survey STATEMAP Program—Geologic mapping for the public good
As of 2020, STATEMAP has invested more than $150 million in 48 State geological surveys, matched dollar for dollar, to complete geologic mapping projects crucial to the health and security of State natural resources and residents. For more information about STATEMAP and other geologic mapping efforts supported by the National Cooperative Geologic Mapping Program, visit https://ncgmp.usgs...
Authors
Abby Ackerman, Darcy McPhee
U.S. Geological Survey EDMAP Program—Training the next generation of geologic mappers U.S. Geological Survey EDMAP Program—Training the next generation of geologic mappers
Detailed geologic maps are the basis of nearly every Earth-science investigation and can be used for natural hazard mitigation, resource identification and exploration, infrastructure planning, and more. A component of the congressionally mandated National Cooperative Geologic Mapping Program, EDMAP is a partnership among the U.S. Geological Survey, the Association of American State...
Authors
Abby Ackerman, Darcy McPhee
Santa Rosa's past and future earthquakes Santa Rosa's past and future earthquakes
Santa Rosa is no stranger to earthquakes. This northern California city was damaged several times in the late 19th and early 20th centuries by shaking from earthquakes, culminating in the devastating earthquake of 1906, whose rupture passed 20 miles to the west of the city on the San Andreas Fault. Then in 1969, Santa Rosa was again strongly shaken and buildings were damaged by a pair of...
Authors
Suzanne Hecker, Darcy McPhee, Victoria E. Langenheim, Janet T. Watt
Three-dimensional electrical resistivity model of the hydrothermal system in Long Valley Caldera, California, from magnetotellurics Three-dimensional electrical resistivity model of the hydrothermal system in Long Valley Caldera, California, from magnetotellurics
Though shallow flow of hydrothermal fluids in Long Valley Caldera, California, has been well studied, neither the hydrothermal source reservoir nor heat source has been well characterized. Here a grid of magnetotelluric data were collected around the Long Valley volcanic system and modeled in 3-D. The preferred electrical resistivity model suggests that the source reservoir is a narrow...
Authors
Jared Peacock, Margaret Mangan, Darcy McPhee, Phil Wannamaker
Imaging the magmatic system of Mono Basin, California with magnetotellurics in three--dimensions Imaging the magmatic system of Mono Basin, California with magnetotellurics in three--dimensions
A three–dimensional (3D) electrical resistivity model of Mono Basin in eastern California unveils a complex subsurface filled with zones of partial melt, fluid–filled fracture networks, cold plutons, and regional faults. In 2013, 62 broadband magnetotelluric (MT) stations were collected in an array around southeastern Mono Basin from which a 3D electrical resistivity model was created...
Authors
Jared Peacock, Margaret Mangan, Darcy McPhee, David Ponce
Summer of Applied Geophysical Experience (SAGE): Training for our future geoscientists Summer of Applied Geophysical Experience (SAGE): Training for our future geoscientists
Energy and natural resources are crucial to the sustainability of worldwide economies, security, and overall well-being. However, the future workforce in the energy and natural-resources sector is at risk, and meeting the challenges of this dwindling workforce requires well-educated geoscientists in exploration and applied geophysics and related geoscience and technology disciplines...
Authors
W.S. Baldridge, Paul Bedrosian, Shawn Biehler, L.W. Braile, John Ferguson, Matthew Folsom, G.R. Jiracek, Shari Kelley, Darcy McPhee, Louise Pellerin, Catherine Snelson
Eruptions at Lone Star geyser, Yellowstone National Park, USA: 2. Constraints on subsurface dynamics Eruptions at Lone Star geyser, Yellowstone National Park, USA: 2. Constraints on subsurface dynamics
We use seismic, tilt, lidar, thermal, and gravity data from 32 consecutive eruption cycles of Lone Star geyser in Yellowstone National Park to identify key subsurface processes throughout the geyser's eruption cycle. Previously, we described measurements and analyses associated with the geyser's erupting jet dynamics. Here we show that seismicity is dominated by hydrothermal tremor (~5...
Authors
Jean Vandemeulebrouck, Robert Sohn, Maxwell L. Rudolph, Shaul Hurwitz, Michael Manga, Malcolm Johnston, S. Adam Soule, Darcy McPhee, Jonathan M. G. Glen, Leif Karlstrom, Fred Murphy
Structural controls on geothermal circulation in Surprise Valley, California: A re-evaluation of the Lake City fault zone Structural controls on geothermal circulation in Surprise Valley, California: A re-evaluation of the Lake City fault zone
Faults and fractures play an important role in the circulation of geothermal fluids in the crust, and the nature of that role varies according to structural setting and state of stress. As a result, detailed geologic and geophysical mapping that relates thermal springs to known structural features is essential to modeling geothermal systems. Published maps of Surprise Valley in...
Authors
Anne E. Egger, Jonathan Glen, Darcy McPhee
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government