Maurizio Fedi

Maurizio Fedi
University of Naples Federico II | UNINA · Department of Earth Sciences, Environment and Resources

PhD

About

283
Publications
73,807
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4,414
Citations
Citations since 2016
70 Research Items
2259 Citations
20162017201820192020202120220100200300
20162017201820192020202120220100200300
20162017201820192020202120220100200300
20162017201820192020202120220100200300
Additional affiliations
January 1990 - December 2011
University of Naples Federico II

Publications

Publications (283)
Article
Full-text available
In this study, we describe new advances in the multiscale methodology to allow a more realistic interpretation of volcanic deformation fields by investigating geometrically irregular bodies and multi-source scenarios. We propose an integrated approach to be applied to InSAR measurements, employing the Multiridge and ScalFun methods and the Total Ho...
Article
The separation of the effects of deep-seated sources of potential fields from those of shallower ones is a frequent requirement when interpreting magnetic or gravity fields. A common procedure is estimating the regional, long wavelength, component of the field by analyzing the data over an area larger than that of the local feature of interest. The...
Article
This paper aims at analyzing the inversion with the mostly used model weighting functions, for both gravity and DC resistivity data. We show that the model weighting function built with depth weighting and compacting factor, formulated for the gravity and magnetics problems, can be useful also for DC resistivity data. We provide a number of synthet...
Article
We have used the very fast simulated annealing algorithm to invert the scaling function along selected ridges, lying in a vertical section formed by upward continuing gravity data to a set of altitudes. The scaling function is formed by the ratio of the field derivative by the field itself, and it is evaluated along the lines formed by the zeros of...
Article
Spectral analysis has been used for studying a variety of geological structures and processes, such as estimation of the depth to the crystalline basement or of the Curie temperature isotherm from magnetic anomalies. However, the analysis is not standard, as it refers to different theoretical frameworks, such as statistical ensembles of homogeneous...
Article
Full-text available
We present a 3D model of the main crustal boundaries beneath the Campanian region and the onshore and offshore surrounding areas, based on high-resolution potential field data. Our main objective is the definition of the main structural interfaces in the whole Campanian region from gravity and magnetic data, thanks to their ability to define them o...
Article
Different geophysical methods use different model parameterizations and inversion algorithms. Thus, combining these different inversion systems and yet adding the nonlinear cross gradient constraint in a joint inversion framework, might be a big challenge, for instance, as explained further in Moorkamp et al. (2011), there is a complex interaction...
Conference Paper
The role of the model weighting function is decisive to give a correct reconstruction of the source properties in geophysical inversion. We analyze three different types of weighting functions for the gravity problem and for the linearized DC resistivity problem. While weighting functions based on depth weighting and compactness have been used in g...
Conference Paper
Full-text available
The aim of this paper is to identify and constrain the geometry (strike, dip direction and dip angle) of the seismogenic structures in areas of central-southern Apennines characterized by outcropping/ buried and/or active/silent faults. We use an integrated analysis of geo-structural, seismological and gravimetric data in GIS environment and focus...
Article
Full-text available
We aim at modeling the main crustal and thermal interfaces of Sicily (Italy), a key area for understanding the geological complexity at the collisional boundary between the African and European plates. To this end, we analyze the gravity and magnetic fields, integrated with information from well logs, geology, heat flow, and seismic data. In order...
Article
Full-text available
We show that high‐resolution aeromagnetic surveys, although rarely employed in the research of salt structures, may be an effective and low‐cost tool for mapping diapirism. A multiscale analysis of a high‐resolution magnetic data set at Nordkapp Basin in the Barents Sea, allows a clear reconstruction of the main salt diapirs of the basin using Mult...
Article
A new method for inversion of potential fields is developed using a depth-weighting function specifically designed for fields related to complex source distributions. Such weighting function is determined from an analysis of the field which precedes the inversion itself. The algorithm is self-consistent, meaning that the weighting used in the inver...
Article
Full-text available
In this paper we perform a 2-D joint inversion of DC resistivity and magnetic data, constrained by cross-gradients. Inspired by methods developed for potential fields, we introduce into both the separate and joint inversion algorithms also compactness and depth weighting functions, under the form of a model weighting-function. These constraints, us...
Article
Inversion of magnetic data is complicated by the presence of remanent magnetization and it provides limited information about magnetic source because of the insufficiency of data and constraint information. We propose a Fourier domain transformation allowing the separation of magnetic anomalies into the components caused by induced and remanent mag...
Article
Full-text available
In this work, the crustal volume struck by the 2016-2017 seismic sequence in Central and Northern Apennines is investigated using constrained 3D inversion of the gravity anomalies. In order to focus on the area comprising the two mainshocks of the sequence, we perform a regional field removal on the data as a pre-processing step. This residual data...
Article
Both imaging and inversion of potential fields allow the estimation of the source-property distribution. Here, we compare these methods in order to assess their relative advantages and performances. Specifically, we use an iterative imaging algorithm, which is based on the compact depth from extreme points (CDEXP), and the data-space inverse algori...
Article
Observations from satellites provide high-resolution images of ground deformation allowing to infer deformation sources by developing advanced modeling of magma ascent and intrusion processes. Nevertheless, such models can be strongly biased without a precise model of the internal structure of the volcano. In this study, we jointly exploited two in...
Preprint
Full-text available
In this paper, we present a new Bouguer gravity map of the Northern Tuscan offshore (central Italy), based on original gravity data acquired on the islands of the Tuscan Archipelago. Our dataset integrates 274 unpublished gravity field measurements with 126 available marine gravity data of the northern Tyrrhenian Sea. The Bouguer anomaly map shows...
Article
Full-text available
In this paper, we present a new Bouguer gravity map of the Northern Tuscan offshore (central Italy), based on original gravity data acquired on the islands of the Tuscan Archipelago. Our dataset integrates 274 unpublished gravity field measurements with 126 available marine gravity data of the northern Tyrrhenian Sea. The Bouguer anomaly map shows...
Conference Paper
In recent years, potential field quantities such as the Normalized Source Strength and the Total Gradient have been increasingly used in applied and environmental geophysics because of their properties. They are always non-negative and minimally affected by the direction of the source’s remanent magnetization. Despite the fact that these quantities...
Article
Full-text available
In the European region, the magnetic field at satellite altitudes (∼350 km) is mainly defined by a long-wavelength magnetic low, called the Central European Magnetic Low (CEML) here, located to the southwest of the Trans-European Suture Zone (TESZ). We studied this area through a joint analysis of magnetic and total gradient (∇T) anomaly maps for a...
Article
Full-text available
Uturuncu volcano (southwestern Bolivia) is localized within one of the largest updoming volcanic zones, the Altiplano Puna Volcanic Complex (APVC). In several geodetic studies the observed uplift phenomenon is analyzed and modeled by considering a deep source, related to the Altiplano Puna Magma Body (APMB). In this framework, we perform a multisca...
Article
Full-text available
In the European region, the magnetic field at satellite altitudes (~ 350 km) is mainly defined by a long-wavelength magnetic-low called here the Central Europe Magnetic Low (CEML), located to the southwest of the Trans European Suture Zone (TESZ). We studied this area by a joint analysis of the magnetic and total gradient (∇T) anomaly maps, for a r...
Article
To investigate the crustal magnetic structure, it is important to assess the susceptibility and remanence properties of rocks and ores. In this paper, we propose a method to extract the contributions of induced and remanent magnetization from modeling of magnetic anomalies. We first estimate the direction of the total magnetization vector by studyi...
Article
Full-text available
We report the results of a multidisciplinary investigation performed across the normal Quaternary faults that ruptured the surface during the August 24 (Mw 6.0) and October 30 (Mw 6.5), 2016 strong earthquakes in the Mt. Vettore-Mt. Bove areas, central Italy. Our aim is to test the effectiveness of the contribution of a multi-scale gravimetric anal...
Article
Full-text available
Abstract Volcanic phenomena are currently monitored by the detection of physical and chemical observations. Generally, the ground deformation field is the most relevant shallow expression of the geometric and physical parameters variations in the magmatic reservoir. In this study, we propose a novel method for the direct estimation of the geometric...
Article
Full-text available
Natural remanent magnetization and self-demagnetization on high-susceptibility bodies are two important factors affecting magnetic data inversion. We propose a framework for the inversion and interpretation of magnetic anomalies, in which significant remanent magnetization and self-demagnetization are present simultaneously. The framework is based...
Article
We present the joint interpretation of airborne electromagnetic and aeromagnetic data, acquired to study kimberlite pipes. We analyse the data surveyed in 2005 over Drybones Bay, Archean Slave Province of the Northwest Territories, northern Canada. This area hosts a recently discovered kimberlite province with >150 kimberlite pipes. Magnetic and el...
Article
Full-text available
S U M M A R Y We present the results of a multidisciplinary and multiscale study at Mt. Massico, Southern Italy. Mt. Massico is a carbonate horst located along the Campanian-Latial margin of the Tyrrhenian basin, bordered by two main NE-SW systems of faults, and by NW-SE and N-S trending faults. Our analysis deals with the modelling of the main NE-...
Article
Full-text available
We analyze a wide gravity low in the Campania Active Volcanic Area and interpret it by a large and deep source distribution of partially molten, low-density material from about 8 to 30 km depth. Given the complex spatial-temporal distribution of explosive volcanism in the area, we model the gravity data consistently with several volcanological and...
Article
We analyze a wide gravity low in the Campania Active Volcanic Area and interpret it by a large and deep source distribution of partially molten, low-density material from about 8 to 30 km depth. Given the complex spatial-temporal distribution of explosive volcanism in the area, we model the gravity data consistently with several volcanological and...
Conference Paper
Geophysical modelling for complex geology needs a multidisciplinary approach. Seismic methods are mostly used in exploration geophysics, being them characterized by a high resolution. However, inaccuracies from velocity models and complex shape of reflectors may make difficult the subsurface modelling and call for integration with other geophysical...
Conference Paper
Full-text available
Multiscale methods have been of great utility in applied geophysics to interpret potential field data and to retrieve the source position and shape. The Multiridge method allows obtaining the source location without specifying any a-priori information about the source, by searching the maxima of the potential field and the zeros of its vertical and...
Article
The normalized full gradient is based on the noticeable stability of the modulus of the analytic signal of downward potential fields. We have developed a new approach to the study of the normalized full gradient, based on assessing the entropy of the normalized modulus of the analytic signal at each level of continuation. The increased disorder of...
Article
We present a nonlinear method to invert potential fields data, based on inverting the scaling function (τ) of the potential fields, a quantity that is independent on the source property, that is the mass density in the gravity case or the magnetic susceptibility in the magnetic case. So, no a priori prescription of the density contrast is needed an...
Article
Full-text available
S U M M A R Y We present the results of a multidisciplinary and multiscale study at Mt. Massico, Southern Italy. Mt. Massico is a carbonate horst located along the Campanian-Latial margin of the Tyrrhenian basin, bordered by two main NE-SW systems of faults, and by NW-SE and N-S trending faults. Our analysis deals with the modelling of the main NE-...
Article
We have developed a method to interpret potential fields, which obtains 1D models by inverting vertical soundings of potential field data. The vertical soundings are built through upward continuation of potential field data, measured on either a profile or a surface. The method assumes a forward problem consisting of a volume partitioned in layers,...
Conference Paper
Full-text available
The complex geological setting of the Adriatic region is still an interesting subject of debate and interpretation. The northeastern portion of the Adriatic Sea is characterized by a wide magnetic anomaly extending up to the coast of Croatia. In this work we presented a new model of the main source of the Adriatic magnetic anomaly using the Multiri...
Chapter
Full-text available
In past decades, magnetic surveying had become popular as one of the most effective techniques supporting archaeological prospecting. This is possible because the existence of susceptibility contrasts between the cover soil and several buried finds often causes detectable anomalies. More recently, great advances were made in signal enhancement and...
Chapter
Full-text available
In past decades, magnetic surveying had become popular as one of the most effective techniques supporting archaeological prospecting. This is possible because the existence of susceptibility contrasts between the cover soil and several buried finds often causes detectable anomalies. More recently, great advances were made in signal enhancement and...
Conference Paper
Remanent magnetization is an important vector parameter of rocks' and ores' magnetism, which is related to the intensity and direction of primary geomagnetic fields at all geological periods and hence shows critical evidences of geological tectonic movement and sedimentary evolution. We extract the remanence information from the distributions of th...
Article
Full-text available
We carried out a study of the structures of the volcanic island of Ischia by the analysis and interpretation of high-resolution aeromagnetic data and by a newly compiled inland gravity data set. The comparison between the vertical gradient of gravity data and pole-reduced magnetic data was performed through semblance analysis and highlighted a corr...
Article
Imaging of potential fields yields a fast 3D representation of the source distribution of potential fields. Imaging methods are all based on multiscale methods allowing the source parameters of potential fields to be estimated from a simultaneous analysis of the field at various scales or, in other words, at many altitudes. Accuracy in performing u...
Article
Full-text available
We analyzed new magnetic, bathymetric, and seismic data acquired in the offshore sector of Somma-Vesuvius volcano (Italy). We detected a group of high-intensity, short wavelength magnetic anomalies corresponding to partly buried volcanic dome-like structures located by seismic data. The magnetic anomalies are aligned along a NW-SE strike that is th...
Conference Paper
Full-text available
A time domain electromagnetic and a magnetic surveys were conducted by a VTEM system in 2005 over Drybones kimberlite (Canada). The EM data, showing IP effect, were inverted using the modified AarhusINV code with Cole-Cole modeling while for the magnetic data we used a new inversion algorithm considering vertical profiles (soundings) of data at dif...
Article
We present a 3-D interpretation of the deep magnetic sources beneath the main geological structure of central-eastern Europe, the “Trans-European Suture Zone” (TESZ). We used a multiscale analysis of aeromagnetic data, based on a multiscale data set generated by upward continuation of the European and Mediterranean Magnetic Project data set from 5...
Conference Paper
Potential fields are here treated as singular functions so to define conveniently the simple idealized sources and the related fields. Then the homogeneity properties of sources and fields are linked through the Poisson theorem so to allow an unambiguous definition of the structural index in terms of the homogeneity of the source. A more complex ca...
Article
Full-text available
The main goal of interpretation of potential fields (gravity and magnetic) data is determination of the buried source parameters including the depth, horizontal position, the structural index and the physical properties, which is magnetic susceptibility in the magnetic cases and density for gravity fields. For a large number of data it is so expens...
Conference Paper
We present a new 1D inversion algorithm for potential field data, which consists in the inversion of vertical soundings of data at different altitudes. The inversion of multiple 1D vertical gravity/magnetic soundings is made over the same source-volume, which is a finite volume of layers of different densities, for interpreting anomalies along a pr...
Conference Paper
Full-text available
Identification of active faults in abruzzo area (central italy) through the analysis of geological, seismological and gravimetric data The aim of this study is to identify and constrain the geometry of the seismogenic structures (active, outcropping and buried fault systems) of the Abruzzo area (central Italy), through an integrated analysis of geo...