EH

Eduardo Huesca–Pérez

Center for Scientific Research and Higher Education at Ensenada

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Roberto Ortega

Center for Scientific Research and Higher Education at Ensenada

Allen Husker

California Institute of Technology

Luis Quintanar

Universidad Nacional Autónoma de México

Dana Carciumaru

Center for Scientific Research and Higher Education at Ensenada

R. Valenzuela

Universidad Nacional Autónoma de México

Edahí Gutiérrez‐Reyes

Center for Scientific Research and Higher Education at Ensenada

E. Gabriela Gutiérrez

The University of Texas at Austin

J. S. Payero

Universidad Nacional Autónoma de México

D. Legrand

Universidad Nacional Autónoma de México

Abhijit Ghosh

University of California, Riverside

Cooperative Institutions

Universidad Nacional Autónoma de México

Center for Scientific Research and Higher Education at Ensenada

Universidad Michoacana de San Nicolás de Hidalgo

Instituto de Geofísica y Astronomía

California Institute of Technology

Centre National de la Recherche Scientifique

Universidad Autónoma Monterrey

Institut de Recherche pour le Développement

Consejo Nacional de Humanidades, Ciencias y Tecnologías

Universidad Autónoma de la Ciudad de México

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Continental crust anisotropy measurements from tectonic tremor in Cascadia

Journal of Geophysical Research Solid Earth (2017)

Eduardo Huesca–Pérez Roberto Ortega Raúl W. Valenzuela

Abstract We present new observations of crustal anisotropy in the southern Cascadia fore arc from tectonic tremor. The abundance of tremor activity in Oregon and northern California during slow‐slip events offers an enormous amount of information with which to measure and analyze anisotropy in the upper brittle continental crust. To accomplish this, we performed analyses of wave polarization and shear wave splitting of tectonic tremor signals by using three component broadband seismic stations. The splitting times range between 0.11 and 0.32 s and are consistent with typical values observed in the continental crust. Fast polarization azimuths are, in general, margin parallel and trend N‐S, which parallels the azimuths of the maximum compressive stresses observed in this region. This pattern is likely to be controlled by the stress field. Comparatively, the anisotropic structure of fast directions observed in the northern section of the Cascadia margin is oblique with respect to the southern section of Cascadia, which, in general, trends E‐W and is mainly controlled by active faulting and geological structures. Source distribution analysis using a bivariate normal distribution that expresses the distribution of tremors in a preferred direction shows that in northern California and Oregon, the population of tremors tends to distribute parallel to fast polarization azimuths and maximum compressive stresses, suggesting that both tremor propagation and anisotropy are influenced by the stress field. Results show that the anisotropy reflects an active tectonic process that involves the northward movement of the Oregon Block, which is rotating as a rigid body. In northern Cascadia, previous results of anisotropy show that the crust is undergoing a shortening process due to velocity differences between the Oregon Block and the North America plate, which is moving more slowly with respect to the Oregon Block, making it clash against Vancouver Island.

Stress field

Shear wave splitting

Continental Margin

Passive margin

10.1002/2017jb013983

Cite

Citations (8)

3-D travel-time tomography of southernmost Baja California Peninsula

Journal of South American Earth Sciences (2020)

Eduardo Huesca–Pérez Edahí Gutiérrez‐Reyes R. Valenzuela Allen Husker Sergio Mayer

Peninsula

Slab

Seismic Tomography

10.1016/j.jsames.2020.102966

Cite

Citations (4)

Temporal variations of non-volcanic tremor (NVT) locations in the Mexican subduction zone: finding the NVT sweet spot

Allen Husker V. Kostoglodov V. M. Cruz‐Atienza D. Legrand Н. М. Шапиро

Epicentral locations of non-volcanic tremors (NVT) in the Mexican subduction zone are determined from the peak of the energy spatial distribution and examined over time. NVT is found to occur persistently at a distance of ∼215 km from the trench, which we term the Spot because this region probably has the proper conditions (i.e., temperature, pressure, and fluid content) for the NVT to occur with minimum shear slip. High-energy NVT episodes are also observed every few months, extending ∼190 km to ∼220 km from the trench with durations of a few weeks. During the 2006 slow slip event (SSE) the duration and the recurrence rate of the NVT episodes increased. Low-energy episodes were also observed, independent from the high-energy episodes, ∼150 km to ∼190 km from the trench during the 2006 SSE. Both the high and low energy episodes were made up of many individual NVT's that had a range of energy-release-rates. However, the highest energy-release-rates of the high-energy episodes were consistently double those of the low-energy episodes and the persistent activity at the Sweet Spot. We suggest that all of the high-energy episodes are evidence of small, short repeat interval SSE. Given this model, the increased recurrence rate of the high-energy NVT episodes during the 2006 long-term SSE implies that short-term SSE's also increase during the SSE and are therefore triggered by the SSE.

Cite

Citations (0)

A Study of Ground Motion Excitation Based on the Earthquake of September 8, 2017: Evidence that Normal Faults Influence the Stress Parameter

Pure and Applied Geophysics (2019)

Roberto Ortega Dana Carciumaru Luis Quintanar Eduardo Huesca–Pérez Edahí Gutiérrez‐Reyes

Thrust fault

10.1007/s00024-019-02150-2

Cite

Citations (5)

Temporal variations of non‐volcanic tremor (NVT) locations in the Mexican subduction zone: Finding the NVT sweet spot

Geochemistry Geophysics Geosystems (2012)

Allen Husker V. Kostoglodov V. M. Cruz‐Atienza D. Legrand Н. М. Шапиро

Epicentral locations of non‐volcanic tremors (NVT) in the Mexican subduction zone are determined from the peak of the energy spatial distribution and examined over time. NVT is found to occur persistently at a distance of ∼215 km from the trench, which we term the “Sweet Spot” because this region probably has the proper conditions (i.e., temperature, pressure, and fluid content) for the NVT to occur with minimum shear slip. High‐energy NVT episodes are also observed every few months, extending ∼190 km to ∼220 km from the trench with durations of a few weeks. During the 2006 slow slip event (SSE) the duration and the recurrence rate of the NVT episodes increased. Low‐energy episodes were also observed, independent from the high‐energy episodes, ∼150 km to ∼190 km from the trench during the 2006 SSE. Both the high and low energy episodes were made up of many individual NVT's that had a range of energy‐release‐rates. However, the highest energy‐release‐rates of the high‐energy episodes were consistently double those of the low‐energy episodes and the persistent activity at the Sweet Spot. We suggest that all of the high‐energy episodes are evidence of small, short repeat interval SSE. Given this model, the increased recurrence rate of the high‐energy NVT episodes during the 2006 long‐term SSE implies that short‐term SSE's also increase during the SSE and are therefore triggered by the SSE.

10.1029/2011gc003916

Cite

Citations (77)

Geometric Aspects of the Full Moment Tensors in the Gulf of California and the Mexican East Pacific Rise

Pageoph topical volumes (2015)

Roberto Ortega Luis Quintanar Eduardo Huesca–Pérez

Moment tensor

Seismic moment

10.1007/978-3-319-51529-8_20

Cite

Citations (0)

Crustal anisotropy from tectonic tremor under Washington State in the Cascadia

Geophysical Research Letters (2015)

Eduardo Huesca–Pérez Abhijit Ghosh

Abstract We present new observations of crustal shear wave anisotropy extracted from nonvolcanic tremor in Cascadia under Washington State. Measurements of crustal anisotropy are extremely sparse and limited in this area mainly due to low level of seismicity. Abundance of tremor activity during slow earthquakes offers a unique opportunity to measure anisotropy parameters of the continental crust using tremor signal. To accomplish this, polarization and splitting analyses of nonvolcanic tremor are performed using three‐component broadband seismic stations. Splitting times measurements range between 0.08 and 0.17 s and similar to the splitting magnitude typically observed in the continental crust. Fast direction of shear wave anisotropy generally trends ESE‐WNW. Fast polarization directions are, in general, perpendicular to the prevailing maximum compressive stress field but tend to be parallel to several mapped EW and ESE‐WNW trending faults in this area. The observed spatial pattern of anisotropy is likely controlled by faulting that accommodates NS compression resulting from the tectonic movement of the Oregon block toward north. Existence of several EW trending crustal faults and source parameters of crustal earthquakes at depth, consistent with the regional stress regime, indicate that these faults may be the dominant factor causing the observed pattern of shear wave anisotropy.

Shear wave splitting

Seismic anisotropy

10.1002/2014gl062614

Cite

Citations (9)

Automatic Selection of Dispersion Curves Based on a Weighted Probability Scheme

Seismological Research Letters (2019)

Roberto Ortega Dana Carciumaru Eduardo Huesca–Pérez E. Gabriela Gutiérrez

Research Article| February 13, 2019 Automatic Selection of Dispersion Curves Based on a Weighted Probability Scheme Roberto Ortega; Roberto Ortega aCentro de Investigación Científica y de Educación Superior de Ensenada—Unidad La Paz, Miraflores 334, Col. Bellavista, 23050 La Paz, Baja California Sur, Mexico, ortega@cicese.mx, carciumaru@cicese.mx Search for other works by this author on: GSW Google Scholar Dana Carciumaru; Dana Carciumaru aCentro de Investigación Científica y de Educación Superior de Ensenada—Unidad La Paz, Miraflores 334, Col. Bellavista, 23050 La Paz, Baja California Sur, Mexico, ortega@cicese.mx, carciumaru@cicese.mx Search for other works by this author on: GSW Google Scholar Eduardo Huesca; Eduardo Huesca bCONACyT‐Centro de Investigación Científica y de Educación Superior de Ensenada—Unidad La Paz, Miraflores 334, Col. Bellavista, 23050 La Paz, Baja California Sur, Mexico, ehuesca@gmail.com, edahigure@gmail.com Search for other works by this author on: GSW Google Scholar Edahí Gutierrez Edahí Gutierrez bCONACyT‐Centro de Investigación Científica y de Educación Superior de Ensenada—Unidad La Paz, Miraflores 334, Col. Bellavista, 23050 La Paz, Baja California Sur, Mexico, ehuesca@gmail.com, edahigure@gmail.com Search for other works by this author on: GSW Google Scholar Seismological Research Letters (2019) 90 (2A): 623–632. https://doi.org/10.1785/0220180282 Article history first online: 13 Feb 2019 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Roberto Ortega, Dana Carciumaru, Eduardo Huesca, Edahí Gutierrez; Automatic Selection of Dispersion Curves Based on a Weighted Probability Scheme. Seismological Research Letters 2019;; 90 (2A): 623–632. doi: https://doi.org/10.1785/0220180282 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySeismological Research Letters Search Advanced Search ABSTRACT In this article, we present a method to obtain dispersion curves using a Bayesian approach. This type of probabilistic analysis explores all possible results, and the final output is not unique but is expressed as a range of solutions. First, we describe how to obtain dispersion curves using manual procedures; then, we present a method that uses a probabilistic approach. The main idea is to use previous knowledge of a shear‐wave velocity structure to obtain a prior dispersion curve while simultaneously computing the expectation function of the spectral amplitude for a range of focal mechanisms. Then, these dispersion curves and expectation functions are simultaneously compared with the observed data, and the selected peaks of the dispersion curve are chosen using a weighted probability decision. In these two stages, we used a probabilistic approach based on Markov chain Monte Carlo (MCMC) with the Metropolis–Hasting sampling algorithm. The entire process is a Bayesian inference; thus, it is updated whenever new information is available in such a way that the result becomes a prior. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Icon

10.1785/0220180282

Cite

Citations (6)

Seismic Source Processes of 25 Earthquakes (Mw>5) in the Gulf of California

Bulletin of the Seismological Society of America (2022)

Eduardo Huesca–Pérez Edahí Gutiérrez‐Reyes Luis Quintanar

ABSTRACT The Gulf of California (GoC) is a complex tectonic boundary that has been instrumented in the past several decades to record broadband seismograms. This volume of data has allowed us to study several source parameters systematically. Before, only a few source parameters of earthquakes greater than magnitude five had been studied in the GoC area. We re-examined the focal mechanisms of several earthquakes in the southern GoC that occurred over the last 20 yr using local–regional distance broadband seismograms. These focal mechanisms were then used as input data to retrieve the time–space history of the rupture for each earthquake. This work contributes to the study of 25 rupture-process models computed with the method proposed by Yagi et al. (1999). To investigate more about the nature of the seismicity in the GoC, we also calculated the non-double-couple component of moment tensors for 45 earthquakes. Previous studies (e.g., Ortega et al., 2013, 2016) have shown that non-double-couple components from moment tensors in this region are associated with complex faulting, suggesting that oblique faults or several parallel faults are interacting simultaneously. Our results show that, at least for moderate earthquakes (5 < M < 6), rupture processes in the GoC show a complex interaction between fault systems. It is revealed on the important contribution of non-double-couple component obtained in the full moment tensor analysis.

Seismogram

Seismic moment

Focal mechanism

Moment tensor

Microseism

10.1785/0120210218

Cite

Citations (2)

Crustal Characteristics in the Subduction Zone of Mexico: Implication of the Tectonostratigraphic Terranes on Slab Tearing

Seismological Research Letters (2020)

Dana Carciumaru Roberto Ortega Jorge Castillo Castellanos Eduardo Huesca–Pérez

Abstract During the past years, significant work has been done for studying the crustal anisotropy and state of stress of the Mexican subduction zone. At the same time, there is new evidence of the geometry of the subducted slab proposing subduction tearing. Here, we present a study of the Earth crust using three different methods: azimuthal anisotropy based on ambient noise, shear-wave splitting of tectonic tremors, and moment tensor inversions of the earthquakes of 7 September 2017 Mw 8.2 Tehuantepec, Mexico. This earthquake initiated a seismic sequence that triggered shallow seismicity and aftershocks. The shallow earthquakes fall into a region where there were few published focal mechanism higher than Mw 4.5. Two slab tearings: in the Michoacán–Guerrero border and in central Oaxaca, best represent the slab geometry of the Mexican subduction zone. At the Michoacán–Guerrero, the subducted slab is subhorizontal, whereas in central Oaxaca the plate is characterized by northeast vergence. We interpret that the mantle’s flow in this part of the subducted slab produces multiple alignments in the crust and differentiates the tectonostratigraphic terranes of the southern region of Mexico.

Slab

Eclogitization

Slab window

North American Plate

Underplating

Focal mechanism

10.1785/0220190117

Cite

Citations (11)