A double seismic antenna experiment at teide Volcano: existence of local seismicity and lack of evidences of Volcanic tremor

Almendros, Javier; Ibáñez, Jesús M.; Alguacil, Gerardo; Morales, J.; Pezzo, E. Del; Rocca, Mario La; Ortiz, R.; Araña, Vicente; Blanco, M. J.

doi:10.1016/s0377-0273(00)00236-5

Cited by 38 publications

(35 citation statements)

References 23 publications

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“…The signal to noise ratio and noise level a ect the coherency of the waveforms and therefore the error. Propagation factors like the ray paths or re ections can also decrease the coherence across the array 42 . The time sampling, grid search and binning for the histograms induces further errors 41 .…”

Section: Frequency Wavenumber Analysismentioning

confidence: 99%

Tremor-rich shallow dyke formation followed by silent magma flow at Bárðarbunga in Iceland

et al. 2017

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Section: Frequency Wavenumber Analysismentioning

confidence: 99%

Tremor-rich shallow dyke formation followed by silent magma flow at Bárðarbunga in Iceland

et al. 2017

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“…In particular, geodetic measurements in the southern part of the caldera using geodetic and leveling micronetworks [16] and seismic studies [10], several gravity campaign for structural studies [17], [1], [2], temporary observations of gravimetric tides [3], regular observations of temperature, fumarolic activity and measurements of different gases emitted at the top of Teide volcano [12] and diffusive degassing in and around the caldera [9]. These observations have not detected any clear anomaly that could be regarded as an indicator of volcanic reactivation in the monitored areas.…”

Section: Data Used In Previous and Current Studiesmentioning

confidence: 99%

Surface deformation studies of Tenerife Island, Spain from joint GPS-DInSAR observations

Samsonov

Tiampo

González³

et al. 2008

2008 Second Workshop on Use of Remote Sensing Techniques for Monitoring Volcanoes and Seismogenic Areas

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Abstract-This work presents results for the three-dimensional displacement field at Tenerife Island calculated from campaign GPS and ascending and descending ENVISAT DInSAR interferograms. The goal of this work is to provide an example of the flexibility of the technique by fusing together new varieties of geodetic data, and to observe surface deformations and study precursors of potential activity in volcanic regions. Interferometric processing of ENVISAT data was performed with GAMMA software. All possible combinations were used to create interferograms and then stacking was used to increase signal-to-noise ratio. Decorrelated areas were widely observed, particularly for interferograms with large perpendicular baseline and large time span. Tropospheric signal was also observed which significantly complicated the interpretation. Subsidence signal was observed in the NW part of the island and around Mount Teide and agreed in some regions with campaign GPS data. It is expected that the technique will provide better results when more high quality DInSAR and GPS data is available.

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“…Del Pezzo et al (1997) analyzed the coda of local earthquakes using two seismic arrays in the eastern part of Las Cañadas, demonstrating the presence of a highly heterogeneous shallow structure producing strong scattering of the seismic waves. The use of seismic antennas allowed Almendros et al (2000) to find the existence of a moderate tectonic seismicity, local (S-P time between 3 and 5 s) and very local (S-P time less than 3 s), with three families of source locations, i.e. below Teide-Pico Viejo, in the eastern border of the caldera, and offshore.…”

Section: Introductionmentioning

confidence: 99%

On the predictability of volcano-tectonic events by low frequency seismic noise analysis at Teide-Pico Viejo volcanic complex, Canary Islands

Tárraga

Carniel

Ortiz

et al. 2006

Nat. Hazards Earth Syst. Sci.

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Abstract. The island of Tenerife (Canary Islands, Spain), is showing possible signs of reawakening after its last basaltic strombolian eruption, dated 1909 at Chinyero. The main concern relates to the central active volcanic complex TeidePico Viejo, which poses serious hazards to the properties and population of the island of Tenerife (Canary Islands, Spain), and which has erupted several times during the last 5000 years, including a subplinian phonolitic eruption (Montaña Blanca) about 2000 years ago. In this paper we show the presence of low frequency seismic noise which possibly includes tremor of volcanic origin and we investigate the feasibility of using it to forecast, via the material failure forecast method, the time of occurrence of discrete events that could be called Volcano-Tectonic or simply Tectonic (i.e. non volcanic) on the basis of their relationship to volcanic activity. In order to avoid subjectivity in the forecast procedure, an automatic program has been developed to generate forecasts, validated by Bayes theorem. A parameter called "forecast gain" measures (and for the first time quantitatively) what is gained in probabilistic terms by applying the (automatic) failure forecast method. The clear correlation between the obtained forecasts and the occurrence of (Volcano-)Tectonic seismic events -a clear indication of a relationship between the continuous seismic noise and the discrete seismic events -is the explanation for the high value of this "forecast gain" in both 2004 and 2005 and an indication that the events are Volcano-Tectonic rather than purely Tectonic.

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A double seismic antenna experiment at teide Volcano: existence of local seismicity and lack of evidences of Volcanic tremor

Cited by 38 publications

References 23 publications

Tremor-rich shallow dyke formation followed by silent magma flow at Bárðarbunga in Iceland

Tremor-rich shallow dyke formation followed by silent magma flow at Bárðarbunga in Iceland

Surface deformation studies of Tenerife Island, Spain from joint GPS-DInSAR observations

On the predictability of volcano-tectonic events by low frequency seismic noise analysis at Teide-Pico Viejo volcanic complex, Canary Islands

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