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Contents
Contents
Summary
Main objectives of the workprogramme
How the project was carried out
Financing and support from other sources
Some significant results
Presentation of results at symposia, workshops and in papers
Main achievements and responsible institutions
IMOR.DG: Icelandic Meteorological Office, Department of Geophysics
UUPP.DGEO: Uppsala University, Department of Geophysics
UEDIN.DGG: University of Edinburgh, Department of Geology and Geophysics
GFZ.DR.DBL: Stiftung GeoForschungsZentrum Potsdam, Division 5 - Disaster Research, Section 5.3 - Deep Borehole Logging
CNRS.DTP: Centre National de la Recherche Scientifique, UPR 0234 - Dynamique Terrestre et Planétaire
NVI: Nordic Volcanological Institute
UBLG.DF: University of Bologna, Department of Physics
UICE.DG: University of Iceland, Science Institute
CNRS.TT: Université Pierre et Marie Curie, Département de Géotectonique
Methods and results
Subproject 1: Real-time evaluation of earthquake-related-processes and development of database, and coordination of the project as a whole
Task 1: Database, development and service
Task 1.1: Data collection
Task 1.2: The database access
Task 2: To map seismically active minifaults of the seismic fault systems
Task 3: To search for time and space patterns in the multiplicity of information in the SIL data
Task 4: Introduction of new algorithms into the alert system and other evaluations of the SIL system
Meetings and conferences
Subproject 2: Development of methods using microearthquakes for monitoring crustal instability
Task 1: Methods for subcrustal mapping of faults
Task 2: Methods for monitoring crustal wave velocities from microearthquakes
Task 3: Methods for monitoring the local rock stress tensor
Task 4: Methods for monitoring of stable/unstable fault movements
Task 5: Methods for statistical analysis of the space/time distribution of microearthquakes and earthquakes
Task 6: Development of a method for acqusition of continuous GPS data at the SIL stations
Meetings and conferences
Subproject 3: Monitoring stress changes before earthquakes using seismic shear-wave splitting
Task 1: Identify optimal stations and search for precursors
Task 2: Station/EQ relationship
Task 3: Developing routine techniques
Task 4: Identify optimum areas
Meetings and conferences
Subproject 4: Borehole monitoring of fluid-rock interaction
Subpart 4A: Geophysical loggings
Task 1: Logging activities
Task 2: Check for changes - results from repeated logging
Tasks 3 and 4: Evaluation of measuring results
Acknowledgements
Subpart 4B: Radon related to seismicity in the South Iceland seismic zone
Task 1: Build an improved LSC apparatus to measure the radon content of water and gas samples
Task 2: Revive the radon sampling program in South Iceland
Subproject 5: Active deformation determined from GPS and SAR
Subpart 5A: SAR interferometry
Task 1: Analysis of SAR images from the ERS-1 and ERS-2 satellites
Subpart 5B: GPS geodesy
Task 1: Installation
Task 2: Deformation rates
Subproject 6: Formation and development of seismogenic faults and fault populations
Subpart 6A: Paleostresses
Task 1: Determine the paleostress tensor
Task 2: Participate in a cooperative effort in the overall project to reconstruct the stress field in these seismic zones
Subpart 6B: Field and theoretical studies of fault populations
Task 1: Make a detailed study of the faults in the TFZ and the SISZ
Task 2: Boundary-element models of the faults
Task 3: Boundary-element studies of the TFZ and the SISZ
Task 4: Make analog models of the SISZ and the TFZ
Task 5: Detailed tectonic map of the TFZ
Subproject 7: Theoretical analysis of faulting and earthquake processes
Subpart 7A: Crust-mantle rheology in Iceland and Mid-Atlantic Ridge from studies of post-seismic rebound
Task 1: Inferences on the regional stress field from the study of secondary earthquake fractures
Task 2: Global post-seismic rebound following strike-slip and normal faulting earthquakes
Task 3: Comparison between global earth models, including sphericity and self-gravitation, and plane models
Task 4: Modelling of a spreading ridge
Task 5: Modelling of accelerated plate tectonics on a ridge following a major earthquake in a transform shear zone: inferences on the rheological structure below Iceland
PRENLAB workshops and coordination meetings
Subpart 7B: Modelling of the earthquake related space-time behaviour of the stress field in the fault system of southern Iceland
Task 1: Calculation of the stress field due to motions on the main faults
Task 2: Comparison with the seismic moment release
Task 3: Stress build-up by these motions and stress release by the major earthquakes
Task 4: Forward modelling of the rheological parameters of the lithosphere/asthenosphere in southern Iceland using data of postseismic deformations
Methods
Modelling tools
Report
Meetings and conferences
Publications
Subproject 1
Subproject 2
Subproject 3
Subproject 4
Subproject 5
Subproject 6
Subproject 7
Bibliography
About this document ...
Gunnar Gudmundsson
1999-03-17
