Margaret E Glasgow
Dr. Margaret E. Glasgow is a Research Geophysicist at the Volcanic Science Center in Moffett Field, California. Margaret uses automated and machine-learning based methods to build datasets that expand the understanding of volcanic and earthquake processes.
Education and Certifications
University of New Mexico, Ph.D. in Earth and Planetary Sciences, 2022
University of New Mexico, M.S. in Earth and Planetary Sciences, 2017
University of North Carolina Wilmington, B.S. Geology, Fine Arts minor, 2014
Science and Products
Evidence for fluid pressurization of fault zones and persistent sensitivity to injection rate beneath the Raton Basin Evidence for fluid pressurization of fault zones and persistent sensitivity to injection rate beneath the Raton Basin
Subsurface wastewater injection has increased the seismicity rate within the Raton Basin over more than two decades, with the basin-wide injection rate peaked between 2009-2015. To understand the evolution of injection-induced earthquakes, we systematically analyzed 2016-2024 broadband recordings with a machine-learning-based phase picker and constructed a catalog with 95,993 earthquakes...
Authors
Mohammadreza Jamalreyhani, Ruijia Wang, Brandon Schmandt, Andres Felipe Peña Castro, Margaret Glasgow
Distinguishing natural sources from anthropogenic events in seismic data Distinguishing natural sources from anthropogenic events in seismic data
As seismic data are increasingly used to investigate a diverse range of subsurface phenomena beyond regular fast-rupturing earthquakes (Peng and Gomberg, 2010; Beroza and Ide, 2011), it is important to acknowledge that human-generated ground vibrations may be mistaken for naturally generated subsurface processes (Larose et al., 2015; Li et al., 2018). Correct discrimination of natural...
Authors
Sean Maher, Margaret Glasgow, Elizabeth Cochran, Zhigang Peng
Reduced injection rates and shallower depths mitigated induced seismicity in Oklahoma Reduced injection rates and shallower depths mitigated induced seismicity in Oklahoma
The proximity of wastewater disposal to the Precambrian basement is a critical factor influencing induced earthquake rates in the Central United States, but the impact of reducing injection depths has not been widely demonstrated. Beginning in 2015, state regulatory efforts in Oklahoma and Kansas mandated that wells injecting into the lower Arbuckle Group, a basal sedimentary unit, be...
Authors
Robert Skoumal, Andrew Barbour, Justin Rubenstein, Margaret Glasgow
Distinguishing natural sources from anthropogenic noise in seismic data Distinguishing natural sources from anthropogenic noise in seismic data
No abstract available.
Authors
Sean Maher, Margaret Glasgow, Elizabeth Cochran, Zhigang Peng
Global variability of the composition and temperature at the 410-km discontinuity from receiver function analysis of dense arrays Global variability of the composition and temperature at the 410-km discontinuity from receiver function analysis of dense arrays
Seismic boundaries caused by phase transitions between olivine polymorphs in Earth's mantle provide thermal and compositional markers that inform mantle dynamics. Seismic studies of the mantle transition zone often use either global averaging with sparse arrays or regional sampling from a single dense array. The intermediate approach of this study utilizes many densely spaced seismic...
Authors
Margaret Glasgow, Hankui Zhang, Brandon Schmandt, Wen-Yi Zhou, Jinchi Zhang
Revisiting the depth distribution of seismicity before and after the 2004–2008 eruption of Mount St. Helens Revisiting the depth distribution of seismicity before and after the 2004–2008 eruption of Mount St. Helens
Hypocenter estimation at active volcanoes improves our understanding of their magmatic systems and indicates changing conditions at depth for continuously monitored volcanoes. The most active volcano in the Cascades Range, Mount St. Helens, has a multi-decadal earthquake catalog and it shows an apparent change in the depth distribution of seismicity before and after the 2004–2008 dome...
Authors
Han Zhang, Margaret Glasgow, Brandon Schmandt, Weston Thelen, Seth Moran, Amanda Thomas
Science and Products
Evidence for fluid pressurization of fault zones and persistent sensitivity to injection rate beneath the Raton Basin Evidence for fluid pressurization of fault zones and persistent sensitivity to injection rate beneath the Raton Basin
Subsurface wastewater injection has increased the seismicity rate within the Raton Basin over more than two decades, with the basin-wide injection rate peaked between 2009-2015. To understand the evolution of injection-induced earthquakes, we systematically analyzed 2016-2024 broadband recordings with a machine-learning-based phase picker and constructed a catalog with 95,993 earthquakes...
Authors
Mohammadreza Jamalreyhani, Ruijia Wang, Brandon Schmandt, Andres Felipe Peña Castro, Margaret Glasgow
Distinguishing natural sources from anthropogenic events in seismic data Distinguishing natural sources from anthropogenic events in seismic data
As seismic data are increasingly used to investigate a diverse range of subsurface phenomena beyond regular fast-rupturing earthquakes (Peng and Gomberg, 2010; Beroza and Ide, 2011), it is important to acknowledge that human-generated ground vibrations may be mistaken for naturally generated subsurface processes (Larose et al., 2015; Li et al., 2018). Correct discrimination of natural...
Authors
Sean Maher, Margaret Glasgow, Elizabeth Cochran, Zhigang Peng
Reduced injection rates and shallower depths mitigated induced seismicity in Oklahoma Reduced injection rates and shallower depths mitigated induced seismicity in Oklahoma
The proximity of wastewater disposal to the Precambrian basement is a critical factor influencing induced earthquake rates in the Central United States, but the impact of reducing injection depths has not been widely demonstrated. Beginning in 2015, state regulatory efforts in Oklahoma and Kansas mandated that wells injecting into the lower Arbuckle Group, a basal sedimentary unit, be...
Authors
Robert Skoumal, Andrew Barbour, Justin Rubenstein, Margaret Glasgow
Distinguishing natural sources from anthropogenic noise in seismic data Distinguishing natural sources from anthropogenic noise in seismic data
No abstract available.
Authors
Sean Maher, Margaret Glasgow, Elizabeth Cochran, Zhigang Peng
Global variability of the composition and temperature at the 410-km discontinuity from receiver function analysis of dense arrays Global variability of the composition and temperature at the 410-km discontinuity from receiver function analysis of dense arrays
Seismic boundaries caused by phase transitions between olivine polymorphs in Earth's mantle provide thermal and compositional markers that inform mantle dynamics. Seismic studies of the mantle transition zone often use either global averaging with sparse arrays or regional sampling from a single dense array. The intermediate approach of this study utilizes many densely spaced seismic...
Authors
Margaret Glasgow, Hankui Zhang, Brandon Schmandt, Wen-Yi Zhou, Jinchi Zhang
Revisiting the depth distribution of seismicity before and after the 2004–2008 eruption of Mount St. Helens Revisiting the depth distribution of seismicity before and after the 2004–2008 eruption of Mount St. Helens
Hypocenter estimation at active volcanoes improves our understanding of their magmatic systems and indicates changing conditions at depth for continuously monitored volcanoes. The most active volcano in the Cascades Range, Mount St. Helens, has a multi-decadal earthquake catalog and it shows an apparent change in the depth distribution of seismicity before and after the 2004–2008 dome...
Authors
Han Zhang, Margaret Glasgow, Brandon Schmandt, Weston Thelen, Seth Moran, Amanda Thomas