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R. Scarpa

University of Salerno

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Edoardo Del Pezzo

Universidad de Granada

Luca Crescentini

University of Salerno

Antonella Amoruso

University of Salerno

Mario La Rocca

University of Calabria

Gaetano De Luca

Istituto Nazionale di Geofisica e Vulcanologia

I. Guerra

University of Calabria

Bellina Di Lieto

Istituto Nazionale di Geofisica e Vulcanologia

Pierdomenico Romano

Istituto Nazionale di Geofisica e Vulcanologia

Gilberto Saccorotti

Istituto Nazionale di Geofisica e Vulcanologia

F. Pingue

INGV Osservatorio Vesuviano

Cooperative Institutions

Istituto Nazionale di Geofisica e Vulcanologia

INGV Osservatorio Vesuviano

Consorzio Venezia Ricerche

University of Salerno

University of Naples Federico II

Istituto Nazionale di Fisica Nucleare, Sezione di Napoli

University of Catania

Istituto per il Rilevamento Elettromagnetico dell'Ambiente

University of Calabria

Presidenza Del Consiglio Dei Ministri

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New insights on fault system of the Pollino swarm from relative location

A. Gervasi Ferdinando Napolitano Danilo Galluzzo I. Guerra R. Scarpa

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The crust and upper mantle structure beneath southern Italy by earthquakes and DSS data

Pure and Applied Geophysics (1981)

Edoardo Del Pezzo I. Guerra R. Scarpa

Upper crust

10.1007/bf00876692

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Citations (6)

Three-dimensional velocity structure and seismicity of Mt. Etna Volcano, Italy

Journal of Volcanology and Geothermal Research (1997)

Gaetano De Luca Luisa Filippi Salvatore Patanè R. Scarpa Sergio Vinciguerra

Hypocenter

P wave

Epicenter

Upper crust

10.1016/s0377-0273(97)00026-7

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Citations (32)

High resolution velocity structure beneath Mount Vesuvius from seismic array data

Geophysical Research Letters (2002)

R. Scarpa F. Tronca Francesca Bianco Edoardo Del Pezzo

A high resolution P‐wave image of Mt. Vesuvius edifice has been derived from simultaneous inversion of travel times and hypocentral parameters of local earthquakes, land based shots and small aperture array data. The results give details down to 300–500 m. The relocated local seismicity appears to extend down to 5 km below the central crater, distributed in a major cluster, centered at 3 km below the central crater and in a minor group, with diffuse hypocenters inside the volcanic edifice. The two clusters are separated by an anomalously high Vp region at around 1 km depth. A zone with high Vp/Vs in the upper layers is interpreted as produced by the presence of intense fluid circulation. The highest energy quakes (up to M = 3.6) are located in the deeper cluster, in a high P‐wave velocity zone. Our results favor an interpretation in terms of absence of shallow magma reservoirs.

Upper crust

P wave

10.1029/2002gl015576

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Citations (62)

Stromboli and its 1975 eruption

Bulletin of Volcanology (1978)

G. Capaldi I. Guerra A. Lo Bascio G. Luongo R. Pece

Effusive eruption

10.1007/bf02597227

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Citations (77)

Seismic and ground deformation monitoring in the seismogenetic region of the southern Apennines, Italy

Tectonophysics (1988)

Giuseppe De Natale F. Pingue R. Scarpa

Focal mechanism

10.1016/0040-1951(88)90043-1

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Citations (17)

Performances of the UNDERground SEISmic array for the analysis of seismicity in Central Italy

Annals of Geophysics (2009)

Gilberto Saccorotti Bellina Di Lieto F. Tronca C. Fischione R. Scarpa

This paper presents the first results from the operation of a dense seismic array deployed in the underground Physics Laboratories at Gran Sasso (Central Italy). The array consists of 13 short-period, three-component seismometers with an aperture of about 550 m and average sensor spacing of 90 m. The reduced sensor spacing, joined to the spatially-white character of the background noise allows for quick and reliable detection of coherent wavefront arrivals even under very poor SNR conditions. We apply high-resolution frequency-slowness and polarization analyses to a set of 27 earthquakes recorded between November, 2002, and September, 2003, at epicentral distances spanning the 20-140 km interval. We locate these events using inversion of P- and S-wave backazimuths and S-P delay times, and compare the results with data from the Centralized National Seismic Network catalog. For the case of S-wave, the discrepancies among the two set of locations never exceed 10 km; the largest errors are instead observed for the case of P-waves. This observation may be due to the fact that the small array aperture does not allow for robust assessment of waves propagating at high apparent velocities. This information is discussed with special reference to the directions of future studies aimed at elucidating the location of seismogenetic structures in Central Italy from extended analysis of the micro-seismicity.

Seismometer

Slowness

Microseism

Seismic array

Passive seismic

10.4401/ag-3116

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Citations (4)

Faulting geometry for the complex 1980 Campania-Lucania earthquake from levelling data

Geophysical Journal International (2005)

Antonella Amoruso Luca Crescentini R. Scarpa

The destructive 1980 Campania-Lucania earthquake was a complex event, consisting of at least three subevents. While the main features of the first (0 s) and of the last (40 s) subevents are widely accepted, the second subevent (20 s) is still controversial. Fault geometries are here determined from levelling data, using a global minimization technique. Even if uplifts of southernmost benchmarks (the most sensitive to the 20 s subevent) are small, new proper statistical analysis allows us to draw a few robust conclusions. Our results agree with previously accepted models as regards the 0 and 40 s subevents. As regards the 20 s subevent, previous models always assumed a northeast-dipping fault, while levelling data show that it could have been equivalently caused by a rupture dipping either southwest or northeast. The statistical significance of the two models is about the same, and strike and dip of the two faults are consistent with the two focal planes previously obtained from teleseismic data. Aftershock distribution seems to favour the southwest-dipping fault model.

Levelling

10.1111/j.1365-246x.2005.02652.x

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Citations (33)

Seismic activity accompanying the 1974 eruption of Mt. Etna

Journal of Volcanology and Geothermal Research (1976)

I. Guerra A. Lo Bascio G. Luongo R. Scarpa

Epicenter

Strombolian eruption

Lateral eruption

Mount

10.1016/0377-0273(76)90024-x

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Citations (39)

The southern Italy earthquake of 23 November 1980: An unusual pattern of faulting

Bulletin of the Seismological Society of America (1986)

Robert S. Crosson M. Martini R. Scarpa Scott C. Key

abstract A complex rupture history for the 23 November 1980 magnitude 6.9 Italian earthquake resulted in an unusual pattern of two high-angle, subperpendicular normal faults forming the corner of a down-dropped crustal block. Evidence for this interpretation is from aftershocks, the pattern of strong ground motion, focal mechanism of the mainshock, and two critically placed leveling profiles. Quantitative modeling of leveling profiles using smoothly varying dislocation segments provides confirmation of the fault pattern and specific verification of the existence of a secondary fault which is suborthogonal to the primary fault. Rupture began on the NW-trending main fault with downward motion of the northeast block. About 40 sec after initial motion began, rupture initiated on an orthogonal NE-trending subsidiary fault, propagating away from the main fault. This fault pattern is consistent with tectonic extension in a northeasterly direction.

Normal fault

Focal mechanism

10.1785/bssa0760020381

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Citations (39)

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