Volcano deformation monitoring in Canary Islands (Spain): IGN network and applied techniques
Abstract
Surface deformation is one of the most important parameters in volcano monitoring. Land movements due to volcanic processes can occur at several spatial and temporal scales and the measurement of these possible deformations has to be done using different geodetic techniques. Although space methods, such as GNSS and InSAR, are increasingly used in recent years, classical geodetic techniques are also very useful in some specific areas. They can complement space geodetic results and provide more information about deformations that can be useful precursors of active volcanoes. Each type of data has different characteristics, such as deformation components or spatial and temporal coverage, so each techniques has its applications and advantages.
Deformation control in Canary Islands performed by the Spanish Instituto Geográfico Nacional (IGN) is shown in this work. It consists of: 1) a continuous GNSS network completely covering the whole archipelago, different strategies to process data are used; 2) a GNSS high-density network around Teide volcano (Tenerife island) observed periodically; 3) a RTK survey around Cumbre Vieja on the south part of La Palma; 4) a robotic total station in the north slope of Tenerife; 5) a tiltmeter network with stations in El Hierro, La Palma and Tenerife; 6) an automatic SAR Interferometry technique (InSAR) system in every islands. In addition, deformation results are integrate with other monitoring techniques, seismic, geochemical and geomagnetic, to have a global vision about what is happening before, during, and after eruptions.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.G33C0703G
- Keywords:
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- 1240 Satellite geodesy: results;
- GEODESY AND GRAVITY;
- 1295 Integrations of techniques;
- GEODESY AND GRAVITY;
- 8485 Remote sensing of volcanoes;
- VOLCANOLOGY