E. E. Brodsky
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View article: To Heal or Not to Heal?: 2. The Moment–Recurrence Time Behavior of Repeating Earthquakes in the 2011 Prague, Oklahoma Aftershock Sequence Is Consistent With Laboratory Healing Rates
To Heal or Not to Heal?: 2. The Moment–Recurrence Time Behavior of Repeating Earthquakes in the 2011 Prague, Oklahoma Aftershock Sequence Is Consistent With Laboratory Healing Rates Open
The timing and failure conditions of an earthquake are governed by the interplay between fault reloading and restrengthening. The moment‐recurrence time behavior of repeating earthquakes can give observational estimates of fault healing ra…
View article: Triggering Intensity Changes Over Time and Space as Measured by Continuous Waveforms in Southern California
Triggering Intensity Changes Over Time and Space as Measured by Continuous Waveforms in Southern California Open
Dynamic triggering of earthquakes is when seismic waves from earthquakes induce seismic activity at a distance. The observability of the seismic wave stresses and their results presents a unique opportunity to understand earthquake interac…
View article: The big impact of small quakes on tectonic tremor synchronization
The big impact of small quakes on tectonic tremor synchronization Open
Tectonic tremor tracks the repeated slow rupture of certain major plate boundary faults. One of the most perplexing aspects about tremor is that some fault segments produce strongly periodic, spatially extensive tremor episodes, while othe…
View article: Precursory Locking Precedes Slip Events on Laboratory Fault
Precursory Locking Precedes Slip Events on Laboratory Fault Open
Earthquakes occur through repeated cycles of locking and slip. What is the relationship between transiently locked patches and the size, location, and timing of the subsequent slip events? Here we use an experimental fault made of transpar…
View article: The Influence of Fault Geometrical Complexity on Surface Rupture Length
The Influence of Fault Geometrical Complexity on Surface Rupture Length Open
Propagating earthquakes must overcome geometrical complexity on fault networks to grow into large, surface rupturing events. We map step‐overs, bends, gaps, splays, and strands of length scales ∼100–500 m from the surface ruptures of 31 st…
View article: Microseismicity at the Time of a Large Creep Event on the Calaveras Fault is Unresponsive to Stress Changes
Microseismicity at the Time of a Large Creep Event on the Calaveras Fault is Unresponsive to Stress Changes Open
The potential relationship between surface creep and deeper geological processes is unclear, even on one of the world’s best-studied faults. From June to August 2021, a large creep event with surface slip of more than 16 mm was recorded on…
View article: Characteristics of the Fault Damage Zone From High‐Resolution Seismic Imaging Along the Palos Verdes Fault, California
Characteristics of the Fault Damage Zone From High‐Resolution Seismic Imaging Along the Palos Verdes Fault, California Open
The distribution and intensity of fault damage zones provides insight into fault activity and its relationship to fluid flow in the crust. Presently, measures of the in‐situ distribution of fault damage remain limited and along‐strike stud…
View article: Granular temperature controls local rheology of vibrated granular flows
Granular temperature controls local rheology of vibrated granular flows Open
We use numerical simulations to demonstrate a local rheology for sheared, vibrated granular flows. We consider a granular assembly that is subjected to simple shear and harmonic vibration at the boundary. This configuration allows us to is…
View article: The influence of earthquake gates on surface rupture length
The influence of earthquake gates on surface rupture length Open
Earthquake magnitude is controlled by the rupture area of the fault network hosting the event. For surface-rupturing large strike-slip earthquakes (~MW6+), ruptures must overcome zones of geometrical complexity along fault networks. These …
View article: Seismological Indicators of Geologically Inferred Fault Maturity
Seismological Indicators of Geologically Inferred Fault Maturity Open
Variations in fault zone maturity have intermittently been invoked to explain variations in some seismological observations for large earthquakes. However, the lack of a unified geological definition of fault maturity makes quantitative as…
View article: Using Deep Learning for Flexible and Scalable Earthquake Forecasting
Using Deep Learning for Flexible and Scalable Earthquake Forecasting Open
Seismology is witnessing explosive growth in the diversity and scale of earthquake catalogs. A key motivation for this community effort is that more data should translate into better earthquake forecasts. Such improvements are yet to be se…
View article: Earthquakes Record Cycles of Opening and Closing in the Enhanced Seismic Catalog of the 2008 Okmok Volcano, Alaska, Eruption
Earthquakes Record Cycles of Opening and Closing in the Enhanced Seismic Catalog of the 2008 Okmok Volcano, Alaska, Eruption Open
Seismicity during explosive volcanic eruptions remains challenging to observe through the eruptive noise, leaving first‐order questions unanswered. How do earthquake rates change as eruptions progress, and what is their relationship to the…
View article: Seismological Stress Drops for Confined Ruptures Are Invariant to Normal Stress
Seismological Stress Drops for Confined Ruptures Are Invariant to Normal Stress Open
Seismic moment and rupture length can be combined to infer stress drop, a key parameter for assessing earthquakes. In natural earthquakes, stress drops are largely depth‐independent, which is surprising given the expected dependence of fri…
View article: A Specific Earthquake Processing Workflow for Studying Long‐Lived, Explosive Volcanic Eruptions With Application to the 2008 Okmok Volcano, Alaska, Eruption
A Specific Earthquake Processing Workflow for Studying Long‐Lived, Explosive Volcanic Eruptions With Application to the 2008 Okmok Volcano, Alaska, Eruption Open
By providing unrivaled resolution in both time and space, volcano seismicity helps to chronicle and interpret eruptions. Standard earthquake detection methods are often insufficient as the eruption itself produces continuous seismic waves …
View article: Long-period and volcano-tectonic earthquakes record cycles of opening and closing in the enhanced seismic catalog of the 2008 Okmok Volcano, Alaska, eruption
Long-period and volcano-tectonic earthquakes record cycles of opening and closing in the enhanced seismic catalog of the 2008 Okmok Volcano, Alaska, eruption Open
IntroductionThe degree of openness of a volcanic system is recognized as a major determinant of behavior (e.g., Vergniolle & Métrich, 2021; Seropian et al., 2021; Roman et al., 2019). Whether magma or gas can escape determines the state of…
View article: Determining hydraulic diffusivity from ambient noise in subsurface flow rate and temperature data
Determining hydraulic diffusivity from ambient noise in subsurface flow rate and temperature data Open
SUMMARY Determining the properties that control fluid flow and pressure migration through rocks is essential for understanding groundwater, energy reservoirs and fault zones. However, direct measurements of these properties underground gen…
View article: Fault Roughness Promotes Earthquake‐Like Aftershock Clustering in the Lab
Fault Roughness Promotes Earthquake‐Like Aftershock Clustering in the Lab Open
Earthquakes rarely occur in isolation but rather as complex sequences of fore, main and aftershocks. Assessing the associated seismic hazard requires a holistic view of event interactions. We conduct frictional sliding experiments on fault…
View article: Simulation Data for Testing Method of Ambient Noise in Temperature Data
Simulation Data for Testing Method of Ambient Noise in Temperature Data Open
Simulation data to accompany manuscript submitted to Geophysical Journal International. This file can be used in conjungtion with the matlab code on the github repository to produce Figures 3 and 4 of the paper. Paper abstract below. Deter…
View article: Simulation Data for Testing Method of Ambient Noise in Temperature Data
Simulation Data for Testing Method of Ambient Noise in Temperature Data Open
Simulation data to accompany manuscript submitted to Geophysical Journal International. This file can be used in conjungtion with the matlab code on the github repository to produce Figures 3 and 4 of the paper. Paper abstract below. Deter…
View article: Earthquake catalogs for: A specific earthquake processing workflow for studying long-lived explosive volcanic eruptions with application to the 2008 Okmok eruption
Earthquake catalogs for: A specific earthquake processing workflow for studying long-lived explosive volcanic eruptions with application to the 2008 Okmok eruption Open
Repository for the seismic catalogs from Garza-Giron et al. (2023a,b). These include the catalog with absolute locations using NonLinLoc (Lomax et al., 2001; Lomax and Curtis, 2001), and the relocated catalogs using hypoDD (Waldhauser and …
View article: Earthquake catalogs for: A specific earthquake processing workflow for studying long-lived explosive volcanic eruptions with application to the 2008 Okmok eruption
Earthquake catalogs for: A specific earthquake processing workflow for studying long-lived explosive volcanic eruptions with application to the 2008 Okmok eruption Open
Repository for the seismic catalogs from Garza-Giron et al. (2023a,b). These include the catalog with absolute locations using NonLinLoc (Lomax et al., 2001; Lomax and Curtis, 2001), and the relocated catalogs using hypoDD (Waldhauser and …
View article: Very Long-Period Seismic Signals and Collapse Events at the Kilauea Summit Crater in 2018
Very Long-Period Seismic Signals and Collapse Events at the Kilauea Summit Crater in 2018 Open
The 2018 Kilauea eruption and East Rift Zone dike intrusion have been accompanied by more than 60 earthquakes with magnitude 4.7 – 5.3 near the summit. Corresponding long-period moment tensor solutions (constrained to have no isotrop…
View article: Seismological Indicators of Geologically Inferred Fault Maturity
Seismological Indicators of Geologically Inferred Fault Maturity Open
Variations in fault maturity have intermittently been invoked to explain variations in some seismological observations for large earthquakes. However, the lack of a unified geological definition of fault maturity makes quantitative assessm…
View article: Using active source seismology to image the Palos Verdes Fault damage zone as a function of distance, depth, and geology
Using active source seismology to image the Palos Verdes Fault damage zone as a function of distance, depth, and geology Open
Fault damage zones provide a window into the non-elastic processes of an earthquake. Geological and seismic tomography methods have been unable to measure damage zones at depth with sufficient spatial sampling to evaluate the relative infl…
View article: Regional Characteristics of Observable Foreshocks
Regional Characteristics of Observable Foreshocks Open
Measures of foreshock occurrence are systematically examined using earthquake catalogs for eight regions (Italy, southern California, northern California, Costa Rica, Onshore Japan, Alaska, Turkey, and Greece) after imposing a magnitude ≥3…