G. A. Abers
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View article: Validation of <i>Ps‐P</i> Tomography for Obtaining 3D Crustal <i>V</i><sub><i>P</i></sub><i>/V</i><sub><i>S</i></sub> With Small‐<i>N</i> Data Sets: An Application to the Mount St. Helens Magmatic System
Validation of <i>Ps‐P</i> Tomography for Obtaining 3D Crustal <i>V</i><sub><i>P</i></sub><i>/V</i><sub><i>S</i></sub> With Small‐<i>N</i> Data Sets: An Application to the Mount St. Helens Magmatic System Open
The high sensitivity of V P /V S to the presence of melt makes images of V P /V S structure particularly useful in magmatic systems, but detailed three‐dimensional models of V P /V S structure in magmatic systems are often restricted to th…
View article: Segmentation and Radial Anisotropy of the Deep Crustal Magmatic System Beneath the Cascades Arc
Segmentation and Radial Anisotropy of the Deep Crustal Magmatic System Beneath the Cascades Arc Open
Volcanic arcs consist of many distinct vents that are ultimately fueled by the common melting processes in the subduction zone mantle wedge. Seismic imaging of crustal‐scale magmatic systems can provide insight into how melt is organized i…
View article: The environment surrounding the subduction zone plate interface
The environment surrounding the subduction zone plate interface Open
The interface between a subducting and overriding plate usually exhibits low seismic velocities within a thin (<6 km thick) layer. The hydrologic and petrologic conditions surrounding this layer control the behavior of the plate interface …
View article: Segmentation and radial anisotropy of the deep crustal magmatic system beneath the Cascades arc
Segmentation and radial anisotropy of the deep crustal magmatic system beneath the Cascades arc Open
Volcanic arcs consist of many distinct vents that are ultimately fueled by the common process of melting in the subduction zone mantle wedge. Seismic imaging of crustal scale magmatic systems can provide insight into how melt is organized …
View article: Focusing Effects of Teleseismic Wavefields by the Subducting Plate beneath Cascadia: Evidence for Slab Continuity
Focusing Effects of Teleseismic Wavefields by the Subducting Plate beneath Cascadia: Evidence for Slab Continuity Open
Seismic wave amplitudes have tremendous sensitivity to subduction structure; however, they are affected by attenuation, scattering and focusing, and have therefore been sparsely used compared with traveltimes. We measure and model teleseis…
View article: Elastic Anisotropy of Lizardite at Subduction Zone Conditions
Elastic Anisotropy of Lizardite at Subduction Zone Conditions Open
Subduction zones transport water into Earth's deep interior through slab subduction. Serpentine minerals, the primary hydration product of ultramafic peridotite, are abundant in most subduction zones. Characterization of their high‐tempera…
View article: Subduction Zone Interface Structure within the Southern MW9.2 1964 Great Alaska Earthquake Asperity: Constraints from Receiver Functions Across a Spatially Dense Node Array
Subduction Zone Interface Structure within the Southern MW9.2 1964 Great Alaska Earthquake Asperity: Constraints from Receiver Functions Across a Spatially Dense Node Array Open
We conduct a high-resolution teleseismic receiver function investigation of the subducting plate interface within the Alaskan forearc beneath Kodiak Island using data collected as part of the Alaska Amphibious Community Seismic Experiment …
View article: Subduction Zone Interface Structure within the Southern MW9.2 1964 Great Alaska Earthquake Asperity: Constraints from Receiver Functions Across a Spatially Dense Node Array
Subduction Zone Interface Structure within the Southern MW9.2 1964 Great Alaska Earthquake Asperity: Constraints from Receiver Functions Across a Spatially Dense Node Array Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Geophysical Research Letters. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn mo…
View article: Comment on "The global range of temperatures on convergent plate interfaces" by England and May
Comment on "The global range of temperatures on convergent plate interfaces" by England and May Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Geochemistry, Geophysics, Geosystems. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.…
View article: Teleseismic Attenuation, Temperature, and Melt of the Upper Mantle in the Alaska Subduction Zone
Teleseismic Attenuation, Temperature, and Melt of the Upper Mantle in the Alaska Subduction Zone Open
Seismic deployments in the Alaska subduction zone provide dense sampling of the seismic wavefield that constrains thermal structure and subduction geometry. We measure P and S attenuation from pairwise amplitude and phase spectral ratios f…
View article: Anisotropy Variations in the Alaska Subduction Zone Based on Shear‐Wave Splitting From Intraslab Earthquakes
Anisotropy Variations in the Alaska Subduction Zone Based on Shear‐Wave Splitting From Intraslab Earthquakes Open
Shear‐wave splitting observations can provide insight into mantle flow, due to the link between the deformation of mantle rocks and their direction‐dependent seismic wave velocities. We identify anisotropy in the Cook Inlet segment of the …
View article: Deep decoupling in subduction zones: Observations and temperature limits
Deep decoupling in subduction zones: Observations and temperature limits Open
The plate interface undergoes two transitions between seismogenic depths and subarc depths. A brittle-ductile transition at 20–50 km depth is followed by a transition to full viscous coupling to the overlying mantle wedge at ∼80 km depth. …
View article: Shallow Slow Earthquake Episodes Near the Trench Axis Off Northern Costa Rica
Shallow Slow Earthquake Episodes Near the Trench Axis Off Northern Costa Rica Open
Slow earthquakes are generally distributed in regions surrounding seismogenic zones along the plate boundaries of subduction zones. In the Costa Rica subduction zone, large regular interplate earthquakes with a magnitude of 7–8 occur repea…
View article: Shallow very low frequency earthquakes and low frequency tremors off Costa Rica
Shallow very low frequency earthquakes and low frequency tremors off Costa Rica Open
We detected very low frequency earthquakes (VLFEs) by the matched-filter technique and calculated the energy rates of shallow low frequency tremors accompanying VLFEs off the Nicoya Peninsula, Costa Rica. We submitted a paper about slow ea…
View article: Shallow very low frequency earthquakes and low frequency tremors off Costa Rica
Shallow very low frequency earthquakes and low frequency tremors off Costa Rica Open
We detected very low frequency earthquakes (VLFEs) by the matched-filter technique and calculated the energy rates of shallow low frequency tremors accompanying VLFEs off the Nicoya Peninsula, Costa Rica. We submitted a paper about slow ea…
View article: Shallow very low frequency earthquakes and low frequency tremors in the Costa Rica subduction zone
Shallow very low frequency earthquakes and low frequency tremors in the Costa Rica subduction zone Open
We detected very low frequency earthquakes (VLFEs) by the matched-filter technique and calculated the energy rates of shallow low frequency tremors accompanying VLFEs off the Nicoya Peninsula, Costa Rica. We submitted a paper about slow ea…
View article: Supplemental Material: Deep decoupling in subduction zones: Observations and temperature limits
Supplemental Material: Deep decoupling in subduction zones: Observations and temperature limits Open
Details of the numerical methods, equations, code and model availability, full list of parameters used in the models, and a summary of previous attenuation studies.
View article: Shear Wave Splitting and Mantle Flow Beneath Alaska
Shear Wave Splitting and Mantle Flow Beneath Alaska Open
Shear wave splitting is often assumed to be caused by mantle flow or preexisting lithospheric fabrics. We present 2,389 new SKS shear wave splitting observations from 384 broadband stations deployed in Alaska from January 2010 to August 20…
View article: SKS Splitting Beneath Mount St. Helens: Constraints on Subslab Mantle Entrainment
SKS Splitting Beneath Mount St. Helens: Constraints on Subslab Mantle Entrainment Open
Observations of seismic anisotropy can provide direct constraints on the character of mantle flow in subduction zones, critical for our broader understanding of subduction dynamics. Here we present over 750 new SKS splitting measurements i…
View article: Shear Velocity Structure From Ambient Noise and Teleseismic Surface Wave Tomography in the Cascades Around Mount St. Helens
Shear Velocity Structure From Ambient Noise and Teleseismic Surface Wave Tomography in the Cascades Around Mount St. Helens Open
Mount St. Helens (MSH) lies in the forearc of the Cascades where conditions should be too cold for volcanism. To better understand thermal conditions and magma pathways beneath MSH, data from a dense broadband array are used to produce hig…
View article: Imaging Subduction Beneath Mount St. Helens: Implications for Slab Dehydration and Magma Transport
Imaging Subduction Beneath Mount St. Helens: Implications for Slab Dehydration and Magma Transport Open
Mount St. Helens (MSH) is anomalously 35–50 km trenchward of the main Cascade arc. To elucidate the source of this anomalous forearc volcanism, the teleseismic‐scattered wavefield is used to image beneath MSH with a dense broadband seismic…
View article: Amphibious surface-wave phase-velocity measurements of the Cascadia subduction zone
Amphibious surface-wave phase-velocity measurements of the Cascadia subduction zone Open
SUMMARY A new amphibious seismic data set from the Cascadia subduction zone is used to characterize the lithosphere structure from the Juan de Fuca ridge to the Cascades backarc. These seismic data are allowing the imaging of an entire tec…
View article: Enhanced Resolution of the Subducting Plate Interface in Central Alaska From Autocorrelation of Local Earthquake Coda
Enhanced Resolution of the Subducting Plate Interface in Central Alaska From Autocorrelation of Local Earthquake Coda Open
Subducting plates below 10‐km depth are primarily imaged using phases from teleseismic earthquakes at frequencies dominantly below 1 Hz, resulting in low‐resolution images compared to fault zone thickness. Here we image the plate boundary …
View article: Shear Wave Splitting and Mantle Flow beneath Alaska Data Set
Shear Wave Splitting and Mantle Flow beneath Alaska Data Set Open
Entire data set for the (under review) publication "Shear Wave Splitting in Alaska." McPherson_S1_Station_Info is a table that contains the following columns (with header row): Station Name, Network, Latitude (Deg), Longitude (Deg). This i…
View article: Shear Wave Splitting and Mantle Flow beneath Alaska Data Set
Shear Wave Splitting and Mantle Flow beneath Alaska Data Set Open
Entire data set for the (under review) publication "Shear Wave Splitting in Alaska." McPherson_S1_Station_Info is a table that contains the following columns (with header row): Station Name, Network, Latitude (Deg), Longitude (Deg). This i…
View article: High seismic attenuation at a mid-ocean ridge reveals the distribution of deep melt
High seismic attenuation at a mid-ocean ridge reveals the distribution of deep melt Open
Seismic attenuation beneath a mid-ocean ridge indicates a deep, narrow column of mantle melt, implying buoyant upwelling.
View article: High seismic attenuation at a mid-ocean ridge reveals the distribution of deep melt
High seismic attenuation at a mid-ocean ridge reveals the distribution of deep melt Open
At most mid-ocean ridges, a wide region of decompression melting must be reconciled with a narrow neovolcanic zone and the establishment of full oceanic crustal thickness close to the rift axis. Two competing paradigms have been proposed t…