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Carrara, R.
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- PublicationOpen AccessSistema Automatico di Misura delle Variazioni del Campo Geomagnetico per Lunghi Periodi di Osservazione(1993)
; ; ; ; ;Faggioni, O.; Istituto Geofisica Marina, CUNISPE ;Carmisciano, C.; Istituto Geofisica Marina, CUNISPE ;Carrara, R.; UNIPI ;Pinna, E.; UNIPI; ; ; We show the experimental results obtained by an automatic system to measure Earth magnetic field variations. The system is made for integration of calculus and measurement standard system (AT486-EDA.FM100B,AT486-Elsec.820). The integration is made by means of multifunction I/O board (NI.AT-MIO-16) and specific software.143 126 - PublicationOpen AccessMegasource time-domain electromagnetic sounding at Poggi del Sasso - Cinigiano (GR)(1994-11)
; ; ; ; ; ;Keller, G. V.; Colorado School of Mines, Golden, CO, U.S.A. ;Cantini, P.; Dipartimento di Scienze della Terra, Università di Pisa, Italy ;Carrara, R.; Dipartimento di Fisica, Università di Pisa, Italy ;Faggioni, O.; Dipartimento di Scienze della Terra, Università di Pisa, Italy ;Pinna, E.; Dipartimento di Scienze della Terra, Università di Pisa, Italy; ; ; ; An experiment was carried out in the vicinity of the “I Terzi” area in Southeastern Tuscany (fig. 1) to evaluate the applicability of the Time Domain Electromagnetic (TDEM) sounding method under the geological and environmental conditions prevailing in that area. An electromagnetic source was established using a motor-generator set and heavy cable. Measurements were attempted at four sites. Numerous samples of electromagnetic noise were recorded at each of these sites. At one site, signals transmitted for a grounded dipole source at 1.6 km distance were also recorded with the noise. The single set of observations has been processed and inverted to yield a six-layer piecewise constant resistivity depth-profile to a depth of about 2 km. The primary achievement of the experiment was demonstration of the praeticability of TDEM methods under the conditions prevailing in the site.180 422