Geodetic And Geophysical Effects Associated With Seismic And Volcanic HazardsJosé Fernandez Although geodetic monitoring techniques have been widely used in areas of seismic or volcanic activity, the difficulty inherent to their discrete nature means that they must be deployed carefully to ensure the best possible detection or sensitivity of these points (see e. g. , BALDI and UNGUENDOLI, 1987; JOHNSON and WYATT, 1994; SEGALL and MATTHEWS, 1997; Yu et al. , 2000). In many cases, a more global monitoring method, is required yet at the same time one that offers the highest level of sensitivity which enables detection of the phenomenon. Interferometry radar (InSAR) techniques have been shown to play an important role in seismic and volcanic monitoring because they cover large areas (100 x 100 km) and can be easily systematized in monitoring (see e. g. , MASSONNET and FEIGL, 1998; BDRGMANN et al. , 2000; MASSONNET and SIGMUNDSON, 2000; HANSSEN, 2001). The limitations inherent to the GPS and InSAR techniques (mainly observations at discrete surface points in the case of GPS and existence of non-coherent areas and the fact that, at present, the three displacement components cannot be obtained in SAR interferometry) can be overcome by using them together or other techniques (e. g. , PUGLISI and COLTELLI, 2001; RODRiGUEZ-VELASCO et al. , 2002; FERNANDEZ et al. , 2003). |
Contents
Stress Changes Modelled for the Sequence of Strong Earthquakes in the South Iceland Seismic Zone Since 1706 | 1305 |
Role of Caldera Boundary Discontinuities | 1329 |
Comparison of Integrated Geodetic Data Models and Satellite Radar Interferograms to Infer Magma Storage During the 19911993 Mt Etna Eruption | 1345 |
Strategy and Results | 1359 |
Real or Instrumental Effects? | 1379 |
Study of Volcanic Sources at Long Valley Caldera California Using Gravity Data and a Genetic Algorithm Inversion Technique | 1399 |
Some Results Obtained from Observations at Three Volcanoes | 1415 |
New Results at Mayon Philippines from a Joint Inversion of Gravity and Deformation Measurements | 1433 |
Developed with Numerical Simulations Review and Applications | 1489 |
A Free Boundary Problem Related to the Location of Volcanic Gas Sources | 1509 |
Implications for Volcanic Activity Monitoring | 1519 |
Simulation of the Seismic Response of Sedimentary Basins with Vertical ConstantGradient Velocity for Incident SH Waves | 1533 |
The Motril City Case Southern Spain | 1549 |
Results of Analysis of the Data of Microseismic Survey at Lanzarote Island Canary Spain | 1561 |
Assessment of Natural Frequencies of Vibration Using Timedependent Horizontaltovertical Spectral Ratios | 1579 |
Tilt Observations in the Normal Mode Frequency Band at the Geodynamic Observatory Cueva de los Verdes Lanzarote | 1597 |
The Interpretation of Gravity Changes and Crustal Deformation in Active Volcanic Areas | 1453 |
Intrusive Mechanisms at Mt Etna Forerunning the JulyAugust 2001 Eruption from Seismic and Ground Deformation Data | 1469 |
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Geodetic And Geophysical Effects Associated With Seismic And Volcanic Hazards José Fernandez No preview available - 2011 |
Common terms and phrases
amplitude analysis BONACCORSO boreholes Boundary Element Method California campaign Campi Flegrei Cañadas caldera Canary Islands components computed density depth displacement dominant frequencies Earth earthquakes effects elastic eruption estimated Etna fault FERNÁNDEZ Figure Genetic Algorithm geodetic Geophys geophysical Geotherm gravimeters gravity changes gravity data ground deformation half-space homogeneous horizontal HVSR InSAR interferograms interpretation intrusion inversion JENTZSCH kg/m³ Lanzarote layer Lett located Long Valley Caldera LUZÓN magma chamber mass Mayon Volcano measurements Merapi method microseisms microtremors Mogi monitoring noise observed obtained oscillations parameters PATANÈ pattern period PINGUE point source pressure Pure appl radius Rayleigh wave recorded residual gravity resurgent dome RUNDLE rupture sedimentary basins seismic Seismol Seismology shallow signal SISZ spatial spectra spherical station stress field structure surface technique Teide Tenerife TIAMPO tilt tiltmeters uplift values variations velocity vertical volcanic activity waves zone