A5054260563- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Seismology and Earthquake Studies
- Geology and Paleoclimatology Research
- Geological and Geophysical Studies Worldwide
- Earthquake Detection and Analysis
- Seismic Waves and Analysis
- High-pressure geophysics and materials
- Seismic Performance and Analysis
- Landslides and related hazards
- Geological formations and processes
- Seismic Imaging and Inversion Techniques
- Planetary Science and Exploration
- Maritime and Coastal Archaeology
- Hydrology and Sediment Transport Processes
- Astro and Planetary Science
- 3D Surveying and Cultural Heritage
- Soil erosion and sediment transport
- Geophysical Methods and Applications
- Structural Health Monitoring Techniques
- Marine and environmental studies
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Geochemistry and Geologic Mapping
Birkbeck, University of London
2016-2025
University College London
2003-2020
ENT and Allergy
2020
University of London
2006-2018
UCL Australia
1992-2010
Durham University
1991
University of Manchester
1991
Research Article| February 01, 2007 Bedrock channel adjustment to tectonic forcing: Implications for predicting river incision rates Alexander C. Whittaker; Whittaker 1Grant Institute of Earth Science, School GeoSciences, University Edinburgh, West Mains Road, Edinburgh EH9 3JW, Scotland, UK Search other works by this author on: GSW Google Scholar Patience A. Cowie; Cowie Mikaël Attal; Attal Gregory E. Tucker; Tucker 2Cooperative in Environmental Sciences (CIRES) and Department Geological...
We use InSAR and body‐wave seismology to determine independent source parameters for the 6th April 2009 M w 6.3 L'Aquila earthquake confirm that ruptured a SW‐dipping normal fault with ∼0.6–0.8 m slip. The causative Paganica had been neglected relative other nearby range‐frontal faults, partly because it has subdued geomorphological expression in comparison these faults. occurred an area marked seismic deficit geodetically determined strain accumulation. our model calculate stress changes on...
Channel geometry exerts a fundamental control on fluvial processes. Recent work has shown that bedrock channel width depends number of parameters, including slope, and is not solely function drainage area as commonly assumed. The present represents the first attempt to investigate consequences dynamic, gradient‐sensitive adjustment for drainage‐basin evolution. We use Channel‐Hillslope Integrated Landscape Development (CHILD) model analyze response catchment given tectonic perturbation,...
The transient response of bedrock rivers to a drop in base level can be used discriminate between competing fluvial erosion models. However, some recent studies conclude that river long profiles approximately characterized by transport‐limited model, while other authors suggest detachment‐limited model best explains their field data. difference is thought due the relative volume sediment being fluxed through system. Using pragmatic approach, we address this debate testing ability end‐member...
Abstract The 28th December 1908 Messina earthquake (Mw 7.1), Italy, caused >80,000 deaths and transformed science by triggering the study of environmental effects worldwide, yet its source is still a matter debate. To constrain geometry kinematics we use elastic half-space modelling on non-planar faults, constrained geology geomorphology Strait, to replicate levelling data from 1907–1909. novelty our approach that (a) recognise similarity between pattern vertical motions other normal...
In order to study the existence of possible deficits or surpluses geodetic and earthquake strain in Lazio‐Abruzzo region central Apennines compared 15 ± 3 kyrs multi seismic cycle strain‐rates, horizontal strain‐rates are calculated 5 km × 20 grid squares using slip‐vectors from striated faults offsets Late Pleistocene‐Holocene landforms sediments. Strain‐rates over within vary zero up 2.34 0.54 10 −7 yr −1 resolve variations orientations magnitudes along strike individual faults. Surface a...
Abstract Many areas of the Earth’s crust deform by distributed extensional faulting and complex fault interactions are often observed. Geodetic data generally indicate a simpler picture continuum deformation over decades but relating this behaviour to earthquake occurrence centuries, given numerous potentially active faults, remains global problem in hazard assessment. We address challenge for an array seismogenic faults central Italian Apennines, where crustal extension devastating...
Large continental earthquakes necessarily involve failure of multiple faults or segments. But these same critically-stressed systems sometimes fail in drawn-out sequences smaller over days years instead. These two modes have vastly different implications for seismic hazard and it is not known why fault one mode the other, what controls termination reinitiation slip protracted sequences. A paucity modern observations has hampered our understanding to-date, but a series three Mw>6 from August...
We present a database of field data for active faults in the central Apennines, Italy, including trace, fault and main locations with activity location certainties, slip-rate, slip-vector surface geometry data. As advances occur our capability to create more detailed fault-based hazard models, depending on availability primary observations, it is desirable that such can be organized way easily understood incorporated into future models. The structure presented herein aims assist this...
We present QUIN, a "QUaternary fault strain INdicators database", designed to integrate and unify published unpublished local-scale geological information derive parameters for structural seismotectonic analyses. It provides data on 3339 Fault Striation Pairs (FSP; plane slickenline), distributed within 455 survey sites. These are exposed along the intra-Apennine Quaternary extensional faults of Central Italy. The area covers an extent ~550 km in NW-SE direction. give FSP location, attitude...
Abstract QUIN database integrates and organizes structural-geological information from published unpublished sources to constrain deformation in seismotectonic studies. The initial release, QUIN1.0, comprised 3,339 Fault Striation Pairs, mapped on 445 sites exposed along the Quaternary faults of central Italy. present Data Descriptor introduces 2.0 which includes 4,297 Pairs 738 Structural Sites southern newly investigated span ~500 km Apennines chain, with strikes transitioning ~SE ~SW...
Abstract Tectonically raised paleoshorelines have been recently identified along the southern fault scarps of Mt. Fellino and Roccarainola horst blocks, which are part northeastern border Campania Plain coastal basin (southern Apennines, Italy). Such blocks bounded to south by Polvica Fault, a roughly E‐W trending normal fault. The sequence uplifted has studied in detail integrating geomorphological, structural stratigraphical analyses assess Quaternary uplift blocks. Yet, staircase is still...
ABSTRACT We present detailed data on channel morphology, valley width and grain size for three bedrock rivers crossing active normal faults which differ in their rate, history spatial distribution of uplift. evaluate the extent to downstream changes unit stream power correlate with footwall uplift, use this information identify channels are likely be undergoing a transient response tectonics, hence clarify key geomorphic features associated signal. demonstrate that responding transiently...
ABSTRACT In order to better understand the evolution of rift‐related topography and sedimentation, we present results a numerical modelling study in which elevation changes generated by extensional fault propagation, interaction linkage are used drive landscape model. Drainage network development, landsliding sediment accumulation response faulting calculated using CASCADE, model developed Braun Sambridge, compared with field examples. We first show theoretically how ‘fluvial length scale’,...
Research Article| July 01, 2008 New constraints on sediment-flux–dependent river incision: Implications for extracting tectonic signals from profiles Patience A. Cowie; Cowie * 1School of GeoSciences, University Edinburgh, Edinburgh EH9 3JW, UK E-mail: patience.cowie@ed.ac.uk. Search other works by this author on: GSW Google Scholar Alexander C. Whittaker; Whittaker Mikaël Attal; Attal Gerald Roberts; Roberts 2Joint School Geological and Geophysical Sciences, College London–Birkbeck College,...
Field observations and modelling indicate that elastic interaction between active faults can lead to variations in earthquake recurrence intervals measured on timescales of 102-104 yr. Fault geometry strongly influences the nature adjacent structures as it controls spatial redistribution stress when rupture occurs. In this paper, we use a previously published numerical model for spontaneously growing investigate relationships fault geometry, slip rate statistics recurrence. These develop...
The existence of well-preserved Holocene bedrock fault scarps along active normal faults in the Mediterranean region and elsewhere suggests a dramatic reduction rates rock weathering erosion that correlates with transition from glacial to interglacial climate. We test quantify this interpretation using case study Italian Central Apennines. are derived measurements weathering-pit depth Magnola scarp, where previous cosmogenic Cl-36 analyses constrain exposure history. To estimate average...
Using combined datasets from ground penetrating radar (GPR) and terrestrial laser scanning (TLS) we document the variety of tectono-geomorphic features that contribute to morphology bedrock scarps associated with active extensional faulting in central Italy. Measurement faulted offsets across such can provide important fault slip-rate data relevant seismic hazard analysis if ages be established for offset features. However, interpretation these is challenging when geomorphic processes as...
Surface slip distributions for an active normal fault in central Italy have been measured using terrestrial laser scanning (TLS), order to assess the impact of changes orientation and kinematics when modelling subsurface that control seismic moment release. The southeastern segment surface trace Campo Felice near city L'Aquila was mapped surveyed techniques from structural geology TLS define vertical horizontal offsets geomorphic slopes since last glacial maximum (15 ± 3 ka). geometry 43...