A5030543824- earthquake and tectonic studies
- Geological and Tectonic Studies in Latin America
- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- Earthquake Detection and Analysis
- Geological and Geophysical Studies Worldwide
- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- Seismology and Earthquake Studies
- Reservoir Engineering and Simulation Methods
- Geological and Geophysical Studies
- Disaster Response and Management
- Hydrocarbon exploration and reservoir analysis
- China's Ethnic Minorities and Relations
- Botany and Geology in Latin America and Caribbean
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Geological Modeling and Analysis
- Yersinia bacterium, plague, ectoparasites research
- Disaster Management and Resilience
- CO2 Sequestration and Geologic Interactions
- Seismic Performance and Analysis
- Rock Mechanics and Modeling
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Geological Studies and Exploration
University of East Anglia
2022-2024
Karlsruhe Institute of Technology
2017-2022
Norwich Research Park
2022
University of Liverpool
2013-2019
Volatiles expelled from subducted plates promote melting of the overlying warm mantle, feeding arc volcanism. However, debates continue over factors controlling melt generation and transport, how these determine placement volcanoes. To broaden our synoptic view fundamental mantle wedge processes, we image seismic attenuation beneath Lesser Antilles arc, an end-member system that slowly subducts old, tectonized lithosphere. Punctuated anomalies with high ratios bulk-to-shear (Qκ-1/Qμ-1 > 0.6)...
Abstract The Lesser Antilles arc is only one of two subduction zones where slow‐spreading Atlantic lithosphere consumed. Slow‐spreading may result in the being more pervasively and heterogeneously hydrated than fast‐spreading Pacific lithosphere, thus affecting flux fluids into deep mantle. Understanding distribution seismicity can help unravel effect on geodynamic seismogenic processes. However, a detailed view local across whole zone lacking. Using temporary ocean‐bottom seismic network we...
The margins of the Caribbean and associated hazards resources have been shaped by a poorly understood history subduction. Using new data, we improve teleseismic P-wave imaging eastern upper mantle compare identified subducted-plate fragments with trench locations predicted from plate reconstruction. This shows that material at 700-1200 km depth below South America derives 90-115 Myr old westward subduction, initiated prior to Large-Igneous-Province volcanism. At shallower depths, an...
The development of geodetic tools, such as Interferometric Synthetic Aperture Radar (InSAR), has revolutionized our exploration earthquake physics and the assessment seismic hazard. Over past 20 years, InSAR been increasingly used to determine interseismic strain rate across major seismogenic faults. Strain derived from geodetically mapped crustal deformation rates serves an indicator a fault’s potential, in alignment with classical elastic rebound theory. However, observation...
Volatiles play a pivotal role in subduction zone evolution, yet their pathways remain poorly constrained. Studying the Lesser Antilles can yield new constraints, where old oceanic lithosphere formed by slow-spreading subducts slowly. Here we use local earthquakes recorded temporary VoiLA (Volatile recycling Antilles) deployment of ocean-bottom seismometers fore- and back-arc to characterize 3-D seismic structure north-central zone. Along slab top, mapped based on seismicity, find low Vp...
Abstract On June 21st, a Mw6.2 earthquake struck the Afghan‐Pakistan‐border‐region, situated within India‐Asia collision. Thousand thirty‐nine deaths were reported, making deadliest of 2022. We investigate event's rupture processes by combining seismological and geodetic observations, aiming to understand what made it that fatal. Our Interferometric Synthetic Aperture Radar‐constrained slip‐model regional moment‐tensor inversion, confirmed through field reveal sinistral with maximum slip 1.8...
The 2008 Mw 6.3 Damxung earthquake on the Tibetan Plateau is investigated to (i) derive a coseismic slip model in layered elastic Earth; (ii) reveal relationship between slip, afterslip and aftershocks (iii) place lower bound mid/lower crustal viscosity. fault parameters were derived by inversion of Envisat InSAR data. We developed an improved non-linear scheme find optimal rupture geometry distribution crust. Although data for this event cannot distinguish homogeneous models, maximum latter...
On 25 November 2016, a Mw 6.6 earthquake ruptured the Muji fault in western Xinjiang, China. We investigate rupture independently using geodetic observations from Interferometric Synthetic Aperture Radar (InSAR) and regional seismic recordings. To constrain geometry slip distribution, we test different combinations of dip direction to reproduce InSAR observations. Both optimal distributed model suggest buried two asperities separated by gap greater than 5 km. Additional gaps exist at end...
Three large earthquakes occurred in the Ashikule stepover zone, NW Tibet 2008 (Mw 7.1), 2012 6.2) and 2014 6.9). In this paper we use InSAR data to examine event detail, place it context of both recent/possible future events regional tectonic environment. We present covering coseismic post-seismic phases event, invert for slip distributions during order spatial relationship between earthquake rupture afterslip. To account curved trace as mapped field, model on a non-planar fault. A change...
In this paper, we perform full-waveform regional moment tensor (RMT) inversions, to gain insight into the stress distribution along Lesser Antilles arc. We developed a novel inversion approach, AmPhiB - Amphibious Bayesian, taking account uncertainties associated with OBS deployments like orientation of horizontal components and high noise level. The is conducted using direct, uniform importance sampling fault parameters within tree structure. show that alignment influences obtained source...
It is widely accepted that fault segmentation limits earthquake rupture propagations and therefore size. While along-strike of continental strike-slip faults well observed, direct evidence for off-shore rare. A comparison behaviours in multiple earthquakes might help reveal the characteristics segmentation. In this work, we study 2015 Lefkada earthquake, which ruptured a major active strike slip offshore Island, Greece. We report ground deformation mainly on Island measured by...
Abstract Based on manually analyzed waveforms recorded by the permanent Ecuadorian network and our large aftershock deployment installed after Pedernales earthquake, we derive three‐dimensional Vp Vp/Vs structures earthquake locations for central coastal Ecuador using local tomography. Images highlight features in subducting overriding plates down to 35 km depth. anomalies (∼4.5–7.5 km/s) show roughness of incoming oceanic crust (OC). varies from ∼1.75 ∼1.94, averaging a value 1.82...
Abstract Ocean‐plate stratigraphy (OPS) refers to the lithostratigraphic column atop an ocean plate, which becomes scraped off during subduction and preserved in accretionary complex (AC). Herein, based on structural, stratigraphic, geochronological studies of ACs from Bangong‐Nujiang suture, we demonstrate that OPS can facilitate interpreting structural compositional heterogeneities ACs. Carefully correlated OPSs reveal that, overall sediment‐rich lower different types basement topography...
The physical processes driving post-seismic deformation after large earthquakes are still debated. As in most cases relatively short observation time periods being used, it is challenging to distinguish between the different proposed mechanisms and therefore a longer needed. 1997 MW 7.6 Manyi, Tibet, earthquake has an excellent InSAR data archive available study up ∼13 yr earthquake. coseismic early phases of Manyi were already investigated detail by numerous studies with viscoelastic...
Abstract Earthquakes that rupture several faults occur frequently within the shallow lithosphere but are rarely observed for intermediate‐depth events (70–300 km). On 29 November 2007, M w 7.4 Martinique earthquake struck Lesser Antilles Island Arc near deep end of Wadati‐Benioff‐Zone. The sparse regional seismic network 2007 previously hampered a detailed examination this unusually complex event. Here, we combine data from different studies with moment tensor inversion results and 3D...
Abstract Why aren't students signing up to study geophysics? Are they unaware of how in-demand it is? Or are just too cool for geophysics school?
Volatiles expelled from subducted plates promote melting of the overlying warm mantle, feeding arc volcanism. However, debates continue over factors controlling melt generation and transport how these determine placement volcanoes. To broaden our synoptic view fundamental mantle wedge processes, we image seismic attenuation beneath Lesser Antilles arc, an end-member system that slowly subducts old, tectonised lithosphere. Punctuated anomalies with high ratios bulk-to-shear...
In this paper, we perform full-waveform regional moment tensor (RMT) inversions, to gain insight into the stress distribution along Lesser Antilles arc. We developed a novel inversion approach, AmPhiB - Amphibious Bayesian, taking account uncertainties associated with OBS deployments like orientation of horizontal components and high noise level. The is conducted using direct, uniform importance sampling fault parameters within tree structure. show that alignment influences obtained source...