A5040467269- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Earthquake Detection and Analysis
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Seismic Imaging and Inversion Techniques
- Geological and Tectonic Studies in Latin America
- Geology and Paleoclimatology Research
- Time Series Analysis and Forecasting
- Seismic Waves and Analysis
- Geological and Geophysical Studies Worldwide
- Geophysics and Sensor Technology
- Methane Hydrates and Related Phenomena
- Geochemistry and Geologic Mapping
- GNSS positioning and interference
- Power System Optimization and Stability
- Hydraulic Fracturing and Reservoir Analysis
- Rock Mechanics and Modeling
- Geological and Geophysical Studies
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Real-time simulation and control systems
- Vacuum and Plasma Arcs
- Drilling and Well Engineering
- Marine and environmental studies
Centre National de la Recherche Scientifique
2015-2024
Université de Strasbourg
2022-2024
Institut de Recherche pour le Développement
2015-2022
Université Grenoble Alpes
2015-2022
Université Gustave Eiffel
2015-2022
Institut des Sciences de la Terre
2015-2022
Université Savoie Mont Blanc
2021-2022
University of California, Berkeley
2017-2020
Planetary Science Institute
2017-2019
Université Joseph Fourier
2015
Measurement of interseismic strain along subduction zones reveals the location both locked asperities, which might rupture during megathrust earthquakes, and creeping zones, tend to arrest such seismic ruptures. The heterogeneous pattern coupling presumably relates spatial variations frictional properties interface may also show up in fore-arc morphology. To investigate this hypothesis, we compiled information on extent earthquake ruptures for last 500 years uplift rates derived from dated...
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 Constellations of Synthetic Aperture Radar (SAR) satellites with short repeat time acquisitions allow exploration active faults behavior unprecedented temporal resolution. Along the North Anatolian Fault (NAF) in Turkey, an 80 km long section has been creeping at least since 1944, M w 7.3 earthquake near Ismetpasa, a current Interferometric (InSAR)‐derived average creep rate 8 ± 3 mm/yr (i.e., third NAF long‐term slip rate). We use dense set SAR images acquired by COSMO‐SkyMed...
Research Article| June 13, 2018 Development of a Slow Earthquake Database Masayuki Kano; Kano aEarthquake Institute, The University Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan, babasatoru@eri.u-tokyo.ac.jp, kano@eri.u-tokyo.ac.jp, obara@eri.u-tokyo.ac.jp, maeda@eri.u-tokyo.ac.jp, akiko-t@eri.u-tokyo.ac.jpqNow at Department Geophysics, Graduate School Science, Tohoku University, 6‐3 Aramaki Aza‐Aoba, Aoba‐ku, Sendai, Miyagi 980‐8578, Japan; masayuki.kano.a3@tohoku.ac.jp. Search for...
On 1999 September 21, the Mw 7.6 Chi‐Chi earthquake ruptured a segment of Chelungpu Fault, frontal thrust fault Western Foothills Taiwan. The stress perturbation induced by rupture triggered transient deformation across island, which was well recorded wide network continuously operating GPS stations. analysis more than ten years these data reveals heterogeneous pattern postseismic displacements, with relaxation times varying factor ten, and large cumulative displacements at great distances,...
Episodic tremor and accompanying slow slip are observed at the down-dip edge of subduction seismogenic zones. While tremors seismic signature this phenomenon, they correspond to a small fraction moment released; thus, associated fault can be quantified only by geodetic observations. On continental strike-slip faults, have been in roots Parkfield segment San Andreas fault. However, transient aseismic has never detected. By making use timing activity dense Parkfield-area global positioning...
Abstract Since the discovery of slow slip events, many methods have been successfully applied to model obvious transient events in geodetic time series, such as widely used network strain filter. Independent seismological observations tremors or low‐frequency earthquakes and repeating provide evidence low‐amplitude deformation but do not always coincide with clear occurrences signals series. Here we aim extract signal corresponding slips hidden noise GPS without using information from...
Microseismic noise has been used for seismic velocity monitoring. However, such signals are dominated by low-frequency surface waves that not ideal detecting changes associated with small tectonic processes. Here we show it is possible to extract stable, high-frequency body using tremors generated freight trains. Such allow us focus on perturbations in the crust high spatial resolution. We report 10 years of temporal at San Jacinto Fault. observe and map a two-month-long episode complex...
A slow slip event is a cluster of small aseismic transients intermittently interrupted by relocking the plate interface.
Abstract We jointly investigate aseismic slip transients and tremor activity in south central Alaska. Near the eastern downdip edge of M w 9.2 1964 Prince Williams earthquake rupture, kinematic modeling =7.6 2009–2013 slow event suggests cumulative transient up to 55 cm. During this 5‐year event, tectonic tremors were co‐located with inferred zone occurred weeks‐long bursts events. A short‐term deformation is observed GPS time series spanning a burst September 2010. The time‐dependent =6.9...
Abstract We apply a template matching method on GNSS data for stations located in Honshu, Japan, to detect slow slip events associated with the subducting Philippine Sea and Pacific plates during period from 1997 2020. A measure of minimum detectable moment magnitude is proposed, which we infer that could potentially SSEs as small M w 5.2 westernmost part plate 6 below Honshu eastern coastline. find 12 plate, among eight are known Boso event asperity four others offshore north‐east relative...
Active faults exhibit a broad spectrum of slip modes, primarily governed by depth-dependent pressure and temperature conditions. These transitions manifest as fast earthquake ruptures at shallow, seismogenic depths, gradually evolving into transient slow steady creep with increasing depth. In most subduction zones, the transition zone—situated between updip zone downdip steadily creeping region—is locus events, tectonic tremors, Low-Frequency Earthquakes (LFEs). Within...
Abstract An acceleration of the background seismicity and a shortening slow slip events recurrence intervals in Boso peninsula (Japan) suggest unlocking Philippine Sea‐North America (PHS‐NAM) subduction interface from 1990 to 2011. Motivated by these previous observations, we used GPS (Global Positioning System) time series study 1997–2011 evolution locking offshore Honshu with specific focus on Kanto region. We newly processed data double difference analyzed them trajectory model that...
Abstract Studies of initiation large earthquakes are usually focused on frictional instabilities occurring in the near vicinity future rupture. Possible contributions long‐distance interactions with large‐scale tectonic remain unknown. Here we analyze seismic catalogs and geodetic time series during a few months preceding 2013 M = 8.3 deep‐focus Okhotsk earthquake. This event is preceded by four intense clusters seismogenic zone. GNSS Kamchatka revealed transient landward motion episode 1...
Abstract With precise geodetic measurements, slow transient fault slip events with durations from days to years have been documented at subduction zones for two decades. Long‐lasting longer than 100 occur the downdip edge of seismogenic zones. such long durations, only a few so far. Takagi et al. (2019, https://doi.org/10.1029/2018JB016738 ) propose new methodology detect these and successfully apply it Nankai zone in which they characterize 24 events, including 11 detections. Combined other...
The interactions between aseismic slip and seismicity is mostly studied during postseismic afterslip associated with the generation of aftershocks following large earthquakes. However because stress perturbations produced by coseismic rupture, it remains difficult to distinguish contribution perturbation effects stresses induced on triggering aftershocks. Studying triggered slow events enables us understand direct effect seismicity. While most subduction are deep-seated, at down-dip edge...