A5038636112- Seismology and Earthquake Studies
- earthquake and tectonic studies
- Earthquake Detection and Analysis
- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- Seismic Waves and Analysis
- Geological and Tectonic Studies in Latin America
- Seismic Imaging and Inversion Techniques
- Geophysics and Sensor Technology
- Geochemistry and Geologic Mapping
- Astro and Planetary Science
- Atomic and Subatomic Physics Research
- Disaster Management and Resilience
- Advanced MRI Techniques and Applications
- Planetary Science and Exploration
- Genetic Neurodegenerative Diseases
- Advanced Computational Techniques and Applications
- Gamma-ray bursts and supernovae
- Reservoir Engineering and Simulation Methods
- Public Relations and Crisis Communication
- Mobile Agent-Based Network Management
- Hydrocarbon exploration and reservoir analysis
- Neurological disorders and treatments
- Botany and Geology in Latin America and Caribbean
- Neurological and metabolic disorders
California Institute of Technology
2021-2025
Universidad Nacional Autónoma de México
2012-2022
Anna Needs Neuroblastoma Answers
2015
University of California, Los Angeles
2006-2009
Based on analysis of data from a trans‐Mexico temporary broadband seismic network centered Mexico City, we report that the subducting Cocos Plate beneath central is horizontal, and tectonically underplates base crust for distance 250 km trench. It decoupled by very thin low viscosity zone. The plate plunges into mantle near City but truncated at depth 500 km, probably due to an E‐W propagating tear in slab. Unlike shallow slab subduction Peru Chile, there active volcanism along Trans Mexican...
Abstract Studies of low‐frequency earthquakes (LFEs) have focused on detecting events within previously identified tectonic tremor. However, the principal LFE detection tools matched‐filter searches are intrinsically incapable that not already been characterized as a template event. In this study, we therefore focus generating largest number possible templates by uniformly applying recently developed method to 2.5 yearlong data set in Guerrero, Mexico. Using each detected search, then form...
Abstract Slow transient slip that releases stress along the deep roots of plate interfaces is most often observed on regional GPS networks installed at surface. The detection slow not trivial if dislocation fault depth does generate a geodetic signal greater than observational noise level. Instead typical workflow comparing independently gathered seismic and observations to study slip, we use repeating low‐frequency earthquakes reveal previously unobserved event. By aligning time series with...
Abstract Distributed Acoustic Sensing (DAS) is a promising technique to improve the rapid detection and characterization of earthquakes. Previous DAS studies mainly focus on phase information but less amplitude information. In this study, we compile earthquake data from two arrays in California, USA, one submarine array Sanriku, Japan. We develop data‐driven method obtain first scaling relation between magnitude. Our results reveal that amplitudes recorded by different regions follow similar...
The last decade featured an explosive sequence of discoveries slow slip events (SSE) and nonvolcanic tremor (NVT) in different subduction zones continental faults. Many observations show that SSE is usually associated with increased NVT activity but it not clear yet if those are the result same process or independent expressions a common underlying seismotectonic source. A large Central Mexico occurred 2006 during Meso‐American Subduction Experiment (MASE) which provided continuous for years...
We investigate the triggering of seismic tremor and slow slip event in Guerrero (Mexico) by February 27, 2010 Maule earthquake (Mw 8.8). Triggered tremors start with arrival S wave generated earthquake, keep occurring during passing ScS, SS, Love Rayleigh waves. The dispersion curve footprints high frequency energy envelope triggered tremor, indicating a strong modulation source surface wave. This correlation waves is progressively lost time over few hours. activity continues weeks/months...
Abstract We use data from the Meso‐America Subduction Experiment to detect and locate low‐frequency earthquakes (LFEs) in Mexican subduction zone. visually‐identified templates perform a network waveform correlation search that produced ~17,000 robustly detected LFEs form 15 distinct families. Stacking an LFE family's corresponding detections results seismograms with high signal‐to‐noise ratios clear P S wave arrivals; we these travel times sources. The resulting locations superpose...
Epicentral locations of non‐volcanic tremors (NVT) in the Mexican subduction zone are determined from peak energy spatial distribution and examined over time. NVT is found to occur persistently at a distance ∼215 km trench, which we term “Sweet Spot” because this region probably has proper conditions (i.e., temperature, pressure, fluid content) for with minimum shear slip. High‐energy episodes also observed every few months, extending ∼190 ∼220 trench durations weeks. During 2006 slow slip...
Social responses to alerts are critical but understudied
ABSTRACT The U.S. Geological Survey (USGS)-operated ShakeAlert® system is the United States West Coast earthquake early warning (Given et al., 2018). In this study we detail ShakeAlert’s performance during some of largest events seen by thus far. Statewide public alerting using ShakeAlert messages was authorized in California October 2019. Over next few years, alerts were expanded into Oregon and then Washington (U.S. Survey, 2024). source results are routinely compared to USGS Comprehensive...
The geometry and thermal state of the subducting Cocos plate beneath Mexico City has been enigmatic because absence a deep Wadati‐Benioff zone. We present tomographic image slab based on inversion 8869 teleseismic P wave travel times measured portable broadband seismic network. images combined with receiver function analysis show that runs flat from coast to near City, where it dives into mantle just before Trans‐Mexican Volcanic Belt dip ∼75°. It continues down depth ∼500 km at distance 400...
The Guerrero seismic gap is presumed to be a major source of and tsunami hazard along the Mexican subduction zone. Until recently, there were limited observations at shallow portion plate interface offshore Guerrero, so we deployed instruments better characterize extent seismogenic Here report discovery episodic tremors potential slow slip events in offshore. Their distribution, together with that repeating earthquakes, seismicity, residual gravity bathymetry, suggest undergoes stable slip....
Abstract We present a real-data test for offshore earthquake early warning (EEW) with distributed acoustic sensing (DAS) by transforming submarine fiber-optic cable into dense seismic array. First, we constrain locations using the arrival-time information recorded DAS Second, site effects along calibrated an independent earthquake, estimate magnitudes directly from strain rate amplitudes applying scaling relation transferred onshore arrays. Our results indicate that this single 50 km array...
ABSTRACT The ShakeAlert earthquake early warning (EEW) system partners along with U.S. Geological Survey (USGS) licensed operators deliver EEW alerts to the public and trigger automated systems when a significant is expected impact California, Oregon, or Washington. ShakeAlert’s primary goal provide usable times before arrival of damaging shaking. most likely achieve this in large-magnitude earthquakes. In recent years, has gone through series upgrades its underlying scientific algorithms...
The San Andreas Fault system, known for its frequent seismic activity, provides an extensive dataset earthquake studies. region's well-instrumented networks have been crucial in advancing research on statistics, physics, and subsurface Earth structures. In recent years, data from California has become increasingly valuable deep learning applications, such as Generalized Phase Detection (GPD) phase detection polarity determination, PhaseNet arrival-time picking. continuous accumulation of...
Subduction zones are among the most seismically active regions in world, producing more than half of global seismicity, releasing total seismic energy, and hosting largest known earthquakes slow slip events (SSEs). SSEs “fast” observed to coexist, interact, complement each other at subduction margins, raising seismological questions with significant implications for earthquake tsunami hazard assessments. Over past two decades, almost 50 Mw ≥ 5.0 have been...
Abstract Distributed Acoustic Sensing (DAS) is an emerging technology that converts optical fibers into dense arrays of strainmeters, significantly enhancing our understanding earthquake physics and Earth's structure. While most past DAS studies have focused primarily on seismic wave phase information, accurate measurements true ground motion amplitudes are crucial for comprehensive future analyses. However, in recordings, especially pre‐existing telecommunication cables with uncertain...
The clustering of repeating low-frequency earthquakes through interaction reveals the state tectonic plate boundary.
Abstract We develop a single‐station tremor spectrum template detection method that we applied to continuous seismic data recorded by the Mexican National Seismological Service broadband stations. This allows for an unprecedented long‐term analysis of tectonic in Mexico over multiple slow slip events (SSEs). only detect are within previously discovered regions, thereby extending catalog time but not space. The resulting demonstrates strong correlation bursts activity and aseismic cycles. M ~...