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Projects of the Royal Observatory of Belgium (ROB) at the Lanzarote Geodynamical Laboratory (LGL)

AutorRuymbeke, M. van; Somerhausen, André; Ducarme, B.; Vieira, Ricardo ; Arnoso, José ; Vélez, Emilio
Palabras claveEDAS
Islas Canarias
Ground deformation
Fecha de publicación2001
EditorGeodetic Society of Japan
CitaciónJournal of the Geodetic Society of Japan, 47(1):p.463-469(2001)
ResumenA series of experiments prepared at the Royal Observatory of Belgium, are running in the three Lanzarote laboratories under the EDAS concept (van Ruymbeke et al. ,1993,1997a). The main purposes of our observations which started ten years ago (Fernandez et al., 1990), cover the domains of the tidal effects including oceanic tides interactions, ground deformation and environmental parameters monitoring. We prepare instruments adapted to the special conditions of volcanic medium in the mind of the EDAS concept which is adapted to that project. In the Timanfaya area, we are observing the interactions between a shallow magma chambers and the tidal signals. A correlation exists between the drift rate of a LaCoste & Rornberg gravimeter and the local seismic activity which seems to induce heat flow changes. In the cave "Jameo del Agua", it is possible to record the oceanic tide in excellent conditions due to the filtering of the sea-waves by a few kilometers long siphon connecting the site to the open sea. Original probes are designed to check the long term stability of pressure sensors. A vertical pendulum register the tiit of the ground induced by the oceanic loading. High precision thermometers (van Ruymbeke et al., 1999) assume the monitoring of the vertical thermal gradient which could be influenced by the modulation of the salinity by the water flow from aquifers. The HiCum method is used to detect the admittance between the different parameters.
DescripciónComunicación presentada en el XIV International Symposium on Earth Tides (ETS2000), celebrado en Mizusawa, Japón, entre el 28 de agosto y el 1 de septiembre de 2000. Las actas del congreso han sido publicadas como special issue del Journal of the Geodetic Society of Japan.
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