DSpace Collection:
http://hdl.handle.net/10261/970
2024-03-19T06:12:56ZComparative study of the tidal gravity parameters observed in Timanfaya, Jameos del agua and Cueva de los Verdes stations at Lanzarote island
http://hdl.handle.net/10261/103429
Título: Comparative study of the tidal gravity parameters observed in Timanfaya, Jameos del agua and Cueva de los Verdes stations at Lanzarote island
Autor: Vieira, Ricardo; Ruymbeke, M. van; Arnoso, José; d'Oreye, Nicolas; Fernández Torres, José; Toro y Llaca, Carmen de
Resumen: The Island of Lanzarote, and the Canarian Archipielago, placed near the
western African coast of Moroco has a volcanic origin, like all Canary Islands. The
last eruptions in the island have taken place in the: XVII and XIX centuries. A very
important eruption has ocufred between 1730 and 1736. which is one of the most
prolonged volcanic manifestarion that we have information about. It has caused
important cbanges in the topography of the island, affecting almost 25% of its
surface. As a consequence of this eruption, Possibly due to a remaining superficial magma, there is a zone of strong geotermic anomalies. Thus, in the National
Volcanic Park of Timanfaya can be measured now temperatures of 6O0º C order,
only a few meters depht. Island's crust determined by gravity investigations as well as through seismic profiles, it is of 14 km order.
Since 1987, the collaboration between the IAG (the Institute of Astronomy
and Geodesy) and the Royal Ohservatory of Belgium (ROB) allows gravity tides
observations in three different points of the island. Two of them, Cueva de los Verdes y Jameos del Agua, at the norther part. The third one it is placed at the Park of Timanfaya, just over the anomalies mentioned above. In the present paper we deal with the results which can be related with the crustal structure, geotermic anomalies, ocean effects, etc.2014-10-16T09:43:55ZTemperature Measurements
http://hdl.handle.net/10261/103422
Título: Temperature Measurements
Autor: Ruymbeke, M. van; Westerhaus, H.; Fernández Torres, José
Resumen: We describe a new electronic interface adapted to solid state thermistors, placed in a probe for boreholes. Four applications
are detailed:
- temperature profiles in a borehole at the Royal
Observatory of Belgium
- continuous records of water temperature in boreholes in
Turkey which confirm that a thermal wave is induced by
earth tides.
- high precision temperature profiles along an underground
gallery in the Corona volcano (Lanzarote island)
- continuous records of rock temperature in the same site to
check the thermal influence on the tidal instruments
installed nearby~2014-10-16T09:05:11ZModels at Merapi volcano derived from GPS, gravity and STRM data: a summary.
http://hdl.handle.net/10261/34568
Título: Models at Merapi volcano derived from GPS, gravity and STRM data: a summary.
Autor: Tiede, C.; Tiampo, Kristy F.; Fernández Torres, José
Resumen: Merapi, located at Central Java, Indonesia is one of the most active volcanoes in the entire world.
Within the joint Indonesian-German research project several models have been generated to
understand the volcano, its structure and behavior. We describe here a model based on the joint
interpretation of the GPS and gravimetry measurements as well as a sensitivity analysis approach
for network configuration purposes.2011-04-13T08:34:18ZProyecciones conformes óptimas
http://hdl.handle.net/10261/34386
Título: Proyecciones conformes óptimas
Autor: Otero Juez, Jesús; Pozuelo, Manuel
Resumen: Obtenemos en este artículo la mejor proyección cónica conforme para una corona elipsóidiea
con el criterio de que la norma uniforme del logaritmo de la escala infinitesimal sea
mínima. Probamos que las proyecciones cónicas conformes tienen la propiedad notable
de ser las mejores proyecciones conformes para coronas elipsóidicas según un criterio
de Chebyshev (1856).2011-04-07T08:07:11Z