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  • 1
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    Caratterizzazione della risposta sismica nella città di Benevento. (2007)
    Accademia Nazionale dei Lincei
    Details
    Publication Date: 2017-04-04
    Description: L'ampiezzà de1 moto del suolo, ed il suo contenuto in frequenza, alla súpeúcie della TerIa dípede dale caratte stiche della, sorgente sismica e dalle proprietà meccaniche del úezzo in cui si propagano le onde sismiche. In pa.rtico lare, gli strati pmssimi alla superficie possono modifrcare in modo sigdficativo il segnale sismlco. InJatti la presenza, di uno strato con un fo e contraato di im pedenza, spetto ad un basarnento sottostànte prÌò indurc etretti di risonanza alterando sensibilmente il livelo di anpiezza, il conterùto in Îrequenza e la, durata delle oscilla.zioni del suolo. Un esempio estîemo di questo fenomeno è stato evidenziatoi n occasiored el terremoto di Michoacan,M essico,d el 1985.Q uesto evento, pur essendo a-r.venuto ad alcune centinaia di chilometri da.lla capitale, ha, eccitato con il pe.iodo proprio di oscillnzioÈe( cilca 2 secondi)i depositi di riempimento di un antico lago prosciugato, su cui è costruita parte di Città, del Messico, pmvocaùdo iI crollo di nurerosi edifici e misliaia di morti (Singh et al., 1988
    Description: Published
    Description: Accademia Nazionale dei Lincei, Roma
    Description: 4.2. Scenari e mappe di pericolosità sismica e danno
    Description: open
    Keywords: seismic risk ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
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  • 2
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    ISIDe, an Italian Seismic Data Base with minimum magnitude of completeness ML 1.8 (2009)
    Details
    Publication Date: 2017-04-04
    Description: ISIDe, the Italian Seismic Instrumental and parametric DatabasE, includes today more than 17000 earthquakes occurred in Italy and surrounding seas since April 16th 2005, ranging from magnitude ML 0.2 to ML 5.7. All the ML are computed from synthetic Wood-Anderson records obtained from horizontal broad band and very-broad band registrations. The minimum magnitude of completeness is ML 1.9, as computed from the cumulated Gutenberg-Richter distribution. The ML 4.8 event occurred in the Gargano peninsula (southern Italy) on May 29th 2006 is the crustal earthquake of maximum magnitude included in the catalog; it was followed on December 10th 2006 by an ML 4.5 earthquake, about 40 km northeast of the previous event. The largest earthquake of the catalog (ML 5.7) occurred on October 26th 2006 in the southern Tyrrhenian sea at a depth of 220 km. Although ISIDe is spanning only the last three years and half of Italian seismicity, it is unprecedented in Italy for completeness and homogeneity and represents an optimum test data set for small and moderate seismicity pattern model verification. ISIDe is now available at http://iside.rm.ingv.it/.
    Description: Unpublished
    Description: Hersonissos, Crete, Greece
    Description: 5.2. TTC - Banche dati di sismologia strumentale
    Description: open
    Keywords: Italian Seismicity ; Earthquake Databases ; 05. General::05.02. Data dissemination::05.02.02. Seismological data
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
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  • 3
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    The June 12, 1995 microearthquake sequence in the city of Rome 1167 (2006)
    Details
    Publication Date: 2019-11-04
    Description: The earthquake of June 12, 1995 has been located using local and regional data (41°48.8'N, 12°30.8°6E at a depth of about 11.5 km) a few kilometers inside the city limit of Rome, in its southernmost part. This is the first event that occurred in Rome for which instrumental data are available. The local magnitude estimated from digital recordings is ML 3.6 and it was largely felt reaching intensity VI MCS. We constrained the focal mechanism by analyzing the S-wave polarization and it agrees well with the distribution of P-wave polarities. The fault plane solution shows a dominant strike slip mechanism (strike 275°, dip 70°, rake - 140°). Seismic moment, M0 = 2.3 ± 0.6 1021dyne × , was computed from S-wave displacement spectra of horizontal components of ground motion digital waveforms. The corresponding source radius ranges between 200 and 500 m, depending on the assumed stress drop (100 bars or 10 bars, respectively). The earthquake was preceded by a ML 2.6 foreshock. The seismic sequence lasted a few days during which 38 aftershocks were recorded. The seismicity pattern shows the characteristics of a mainshock-aftershock sequence, rather than swarm behavior which seems to characterize the activity of the neighboring seismogenic areas of the Alban Hills. We used a master event algorithm to locate some of the aftershocks. Results show that the relocated aftershocks are clustered in a small volume in proximity of the mainshock hypocenter.
    Description: JCR Journal
    Description: open
    Keywords: microseismicity ; Rome ; seismic hazard ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 2716564 bytes
    Format: application/pdf
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  • 4
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    Main shock and aftershocks of the December 13, 1990, Eastern Sicily earthquake (2006)
    Details
    Publication Date: 2019-11-04
    Description: n this paper we describe the location and the fault plane solution of the December 13, 1990, Eastern Sicily earthquake (ML = 5.4), and of its aftershock sequence. Because the main shock location is not well constrained due to the geometry of the permanent National Seismic Network in this area, we used a "master event" algorithm to locate it in relation to a well located aftershock. The revised location is slightly offshore Eastern Sicily, 4.8 km north of the largest aftershock (ML = 4.6) that occurred on December 16, 1990. The main shock has a strike-slip mechanism, indicating SE-NW compression with either left lateral motion on a NS plane, or right lateral on an EW plane. Two days after the main event we deployed a local network of eight digital stations, that provided accurate locations of the aftershocks, and the estimate of source parameters for the strongest earthquake. We observed an unusual quiescence after the ML = 5.4 event, that lasted until December 16, when a ML = 4.6 earthquake occurred. The fault plane solution of this aftershock shows normal faulting on E-W trending planes. Between December 16 and January 6, 1991, a sequence of at least 300 aftershock" was recorded by the local network. The well located earthquakes define a small source region of approximately 5 x 2 x 5 km3, with hypocentral depths ranging between 15 and 20 km. The paucity of large aftershocks, the time gap between the main shock occurrence and the beginning of the aftershock sequence (3.5 days), their different focal mechanisms (strike-slip vs. normal), and the different stress drop between main shock and after- shock suggest that the ML = 5.4 earthquake is an isolated event. The sequence of aftershocks began with the ML = 4.6 event, which is probably linked to the main shock with a complex mechanism of stress redistribution after the main faulting episode.
    Description: JCR Journal
    Description: open
    Keywords: seismicity ; focal mechanisms ; local networks ; Eastern Sicily earthquake ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 3816896 bytes
    Format: application/pdf
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  • 5
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    The seismic sequence of Potenza (May 1990) (2008)
    Details
    Publication Date: 2019-11-04
    Description: JCR Journal
    Description: open
    Keywords: Potenza earthquake ; Irpinia fault ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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