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Trumpy E.,CNR Institute of Geosciences and Earth Resources | Coro G.,National Research Council Italy | Manzella A.,CNR Institute of Geosciences and Earth Resources | Pagano P.,National Research Council Italy | And 6 more authors.
International Journal of Digital Earth | Year: 2015

Geothermal data are published using different IT services, formats and content representations, and can refer to both regional and global scale information. Geothermal stakeholders search for information with different aims. E-Infrastructures are collaborative platforms that address this diversity of aims and data representations. In this paper, we present a prototype for a European Geothermal Information Platform that uses INSPIRE recommendations and an e-Infrastructure (D4Science) to collect, aggregate and share data sets from different European data contributors, thus enabling stakeholders to retrieve and process a large amount of data. Our system merges segmented and national realities into one common framework. We demonstrate our approach by describing a platform that collects data from Italian, French, Hungarian, Swiss and Icelandic geothermal data providers. © 2015 Taylor & Francis

Optimized pseudo-random sequences are calculated and tested for the purpose of reducing possible damage to buildings by vibratory sources during seismic reflection acquisitions. The common linear sweeps used at vibratory measurements cause resonance in infrastructure, hence the potential for damage increases. A pseudo-random sweep signal can be a natural choice to decrease resonance effects, but the sequences produced by simple random number generators have disadvantages. In this paper requirements are set and an optimization process is employed for producing pseudo-random sweeps to achieve satisfactory results. Two strategies are considered for pre-processing: autocorrelation and deconvolution. Analysis of optimum sweep examples shows that the peak energy is increased, while side-lobe energy is decreased compared to a simple pseudorandom sweep. Field tests reveal that the peak particle velocity values are reduced substantially, while correlated and deconvolved records are of similar quality compared to a linear sweep driven record. © 2013 Magyar Geofizikusok Egyesülete.

Janos K.,Magyar Foldtani es Geofizikai Intezet MFGI | Andras M.,Magyar Foldtani es Geofizikai Intezet MFGI
Magyar Geofizika | Year: 2012

Geophysical data processing and interpretation along regional deep seismic refraction profiles (like CEL07 and CEL08) were published in previous issues of Hungarian Geophysics. The construction of geophysical base-maps and base-profiles at Geophysical Mapping Division of Eötvös Loránd Geophysical Institute is going on for a long while. This study presents the gravity, magnetic and magnetotelluric data, their processing and our non-seismic interpretation results comparing with the seismic reflection section of PGT-1 profile. It shows that vertical exaggeration of a seismic section may lead to new seismic interpretation. © 2012 Magyar Geofi zikusok Egyesülete.

Kovacs P.,Magyar Foldtani es Geofizikai Intezet MFGI | Csontos A.,Magyar Foldtani es Geofizikai Intezet MFGI | Heilig B.,Magyar Foldtani es Geofizikai Intezet MFGI | Hegymegi L.,MinGeo Kft. | And 3 more authors.
Magyar Geofizika | Year: 2012

Tihany Geophysical Observatory was founded in 1954 to monitor geomagnetic variations. In addition to its original task, however, it has always provided opportunity for other geophysical activities, such as observation and study of paleomagnetic, geothermic, seismologic, and different space phenomena. Geomagnetic data, gathered since 1954 provide an excellent data base for investigating magnetic variations at various time-scales ranging from a few seconds (pulsations) to several decades (secular variations). The investigation of the secular variations in the observatory is complemented, from time to time, by secular or national network campaigns. While fast geomagnetic variations inform on the dynamic processes of the Sun-Earth system, secular variations provide information on the internal processes of the Earth. Study of the dynamics of the space environment is promoted by the recording of ULF and VLF magnetic and electromagnetic phenomena. The observatory contributed to the development of some magnetic instruments and data recording system, as well. Tihany Geophysical Observatory is one of the founding members of INTERMAGNET, the worldwide network of observatories. It coordinates the MM100 meridional magnetometer array organized for monitoring the dynamical state of the plasmasphere. Currently, the network is complemented by new stations and merged with the SEGMA array, within the framework of an EU FP7-funded project, PLASMON, under the name of EMMA. The ULF records of EMMA observatories, together with VLF observations of other stations, are aimed at real-time modeling of the equatorial mass density profile of the plasmasphere. Within the framework of the forthcoming STORM FP7 project, the nonlinear dynamics of the solar system plasma will be studied using records of current ESA and NASA space missions.

Del Ventisette C.,University of Florence | Ciampalini A.,University of Florence | Manunta M.,CNR Institute for Electromagnetic Sensing of the Environment | Calo F.,CNR Institute for Electromagnetic Sensing of the Environment | And 23 more authors.
Remote Sensing | Year: 2013

In the last few years, several advances have been made in the use of radar images to detect, map and monitor ground deformations. DInSAR (Differential Synthetic Aperture Radar Interferometry) and A-DInSAR/PSI (Advanced DInSAR/Persistent Scatterers Interferometry) technologies have been successfully applied in the study of deformation phenomena induced by, for example, active tectonics, volcanic activity, ground water exploitation, mining, and landslides, both at local and regional scales. In this paper, the existing European Space Agency (ESA) archives (acquired as part of the FP7-DORIS project), which were collected by the ERS-1/2 and ENVISAT satellites operating in the microwave C-band, were analyzed and exploited to understand the dynamics of landslide and subsidence phenomena. In particular, this paper presents the results obtained as part of the FP7-DORIS project to demonstrate that the full exploitation of very long deformation time series (more than 15 years) can play a key role in understanding the dynamics of natural and human-induced hazards. © 2013 by the authors.

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