1,721,106 research outputs found
The spectral analysis of voltage measurements for the interpretation of dipole geoelectrical soundings in low resistivity geothermal areas
No full text
The spectral analysis of voltage measurements for the interpretation of dipole geoelectrical soundings in low resistivity geothermal areas
No full textAspects of Magnetic Data Processing
No full textThe presence of noisy contributions such as spikes, stripes and zigzag effects in magnetic data
visualization represents the most common flaw that may degrade the image, rendering the correct
detection and identification of archaeological features very uncertain. In order to overcome this
serious disadvantage, a software package has been developed by implementing very simple
algorithms based on statistical criteria. Some applications to field data are shown and discussed
in order to demonstrate the program’s ability to remove or minimize these undesired contributions.
The results are very satisfactory: high-quality digital raster images may be produced
3-D density model of Mt. Etna volcano (Southern Italy)
No full textA detailed density model of Mt. Etna and its surrounding areas has been evaluated using a 3-D inversion of the gravimetric data acquired in the 1980's. Several high-density and low-density bodies are found, penetrating from shallow depths as far down as 12 km bsl. A positive correlation (in terms of location, extent, density, and velocity) is established between several anomalies of the density model and features identified in previously published seismic tomographies. A prominent high-density body extending
down to 7 km bsl is recognized in the southern part of the Valle del Bove, and interpreted as a solidified magmatic intrusion. On the western boundary of this anomaly, a low-density body is interpreted as a bubble and liquid magma mixture. Outside the central area, three other high-density anomalies are imaged and attributed to the earliest phases of volcanic activity in the area. Several interesting low-density anomalies are also identified and correlated with known fault lines and other structural features of the region
A simple mathematical formula relating the maximum entropy spectral estimate to the amplitude of a noisy signal; application to geoelectrical recordins
No full textPotential field continuation: a comparative analysis of three different types of software
No full text
Reply to R.D. Ray and R.D. Hansen's comments on ' A computer program to perform the upward continuation between arbitrary surfaces'
No full text- …
