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  • 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics  (2)
  • intensity  (2)
  • history
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Natural hazards 10 (1994), S. 1-6 
    ISSN: 1573-0840
    Schlagwort(e): Earthquakes ; intensity ; geological effects
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Geographie , Geologie und Paläontologie
    Notizen: Abstract In 1988, an ESC Working Group ‘Macroseismic Scales’ started upgrading the MSK-81 Intensity Scale. This paper presents the background and decisions made with respect to the so-called seismogeological effects. Discussion has pointed out that they cannot be treated and used in the same way as the effects on humans, objects and buildings, for many reasons. Therefore, the WG adopted the solution of using such effects as a side tool for intensity assessment, providing a comprehensive table where the experimental relations between seismogeological effects and intensity degrees - assessed by means of other effects - are presented.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Journal of seismology 3 (1999), S. 235-252 
    ISSN: 1573-157X
    Schlagwort(e): Catania ; damage ; earthquakes ; eastern Sicily ; history ; macroseismics ; seismic hazard ; seismic risk
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract A detailed study of the most significant seismic effects that took place in the city of Catania has been performed in order to build up a site catalogue, to assess seismic hazard directly from it and to provide the picture of damage scenarios which happened in the past. In the last 1000 years Catania was destroyed twice (1169 and 1693) and more or less severely damaged twelve times (e.g., 1542, 1818, 1848, etc.). Destruction or severe damage are mainly related to earthquakes occurring in the coastal sector of the Hyblean foreland, while slighter, moderate effects are usually due to earthquakes taking place in the seismogenic sources of the Messina Straits and in the inner Hyblean region. The analysis of the historical reports allowed to delineate the damage scenarios of the most relevant events. In particular, for the 1693 case-history it has also been possible to map the damage distribution with reference to the existing urban settlement of the city. The site catalogue was used for assessing seismic hazard; the obtained estimates show that the probability of occurrence for intensity 7 and 10 exceeds 99.9% for 150 and 500 years, respectively. These values, associated with the high vulnerability caused by the city growth which occurred mainly before the introduction of the seismic code (1981) and without ad-hoc planning policies, implies that the urban system is exposed to high seismic risk.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 2017-04-04
    Beschreibung: We designed a new seismic source model for Italy to be used as an input for country-wide probabilistic seismic hazard assessment (PSHA) in the frame of the compilation of a new national reference map. We started off by reviewing existing models available for Italy and for other European countries, then discussed the main open issues in the current practice of seismogenic zoning. The new model, termed ZS9, is largely based on data collected in the past 10 years, including historical earthquakes and instrumental seismicity, active faults and their seismogenic potential, and seismotectonic evidence from recent earthquakes. This information allowed us to propose new interpretations for poorly understood areas where the new data are in conflict with assumptions made in designing the previous and widely used model ZS4. ZS9 is made out of 36 zones where earthquakes with Mw 〉= 5 are expected. It also assumes that earthquakes with Mw up to 5 may occur anywhere outside the seismogenic zones, although the associated probability is rather low. Special care was taken to ensure that each zone sampled a large enough number of earthquakes so that we could compute reliable earthquake production rates. Although it was drawn following criteria that are standard practice in PSHA, ZS9 is also innovative in that every zone is characterised also by its mean seismogenic depth (the depth of the crustal volume that will presumably release future earthquakes) and predominant focal mechanism (their most likely rupture mechanism). These properties were determined using instrumental data, and only in a limited number of cases we resorted to geologic constraints and expert judgment to cope with lack of data or conflicting indications. These attributes allow ZS9 to be used with more accurate regionalized depth-dependent attenuation relations, and are ultimately expected to increase significantly the reliability of seismic hazard estimates.
    Beschreibung: Published
    Beschreibung: 85-108
    Beschreibung: 3.2. Tettonica attiva
    Beschreibung: 4.2. TTC - Scenari e mappe di pericolosità sismica
    Beschreibung: JCR Journal
    Beschreibung: reserved
    Schlagwort(e): Seismotectonics ; Seismic source zone model ; Seismic hazard ; Italy ; 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics ; 04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk ; 04. Solid Earth::04.07. Tectonophysics::04.07.04. Plate boundaries, motion, and tectonics
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Publikationsdatum: 2017-04-04
    Beschreibung: The methodology proposed by Bakun and Wentworth (1997, Estimating earthquake location and magnitude from seismic intensity data, Bull. Seism. Soc. Am., 87, 1502-1521; hereinafter B&W) and calibrated with Italian data by Gomez Capera AA, D’Amico V, Meletti C (2008, Calibrating the Bakun-Wentworth’s method for the macroseismic estimation of earthquake parameters in Italy, this conference) was applied to the recently released macroseismic database of Italian earthquakes (DBMI07; http://emidius.mi.ingv.it/DBMI07). The database contains about 83000 intensity data points for 1430 earthquakes. In the time-interval 1900-2006, for the greater part of the earthquakes the instrumental determination (epicentral coordinates and magnitude) is available. Thus, the Bakun and Wentworth method (B&W) was applied to a large set of Italian earthquakes and the results compared with those obtained adopting the Boxer approach (Gasperini, P., Bernardini, F., Valensise, G., Boschi, E.,1999, Defining seismogenic sources from historical earthquake felt reports, Bull. Seismol. Soc. Am. 89, 94-110); epicentral determinations by both methods were then compared with the instrumental parameters.
    Beschreibung: Published
    Beschreibung: Hersonissos, Creta island, Greece
    Beschreibung: 5.1. TTC - Banche dati e metodi macrosismici
    Beschreibung: open
    Schlagwort(e): earthquake parameters ; macroseismic ; magnitude from macroseismic data ; Bakun and Wentworth method ; 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: Abstract
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Publikationsdatum: 2019-11-04
    Beschreibung: In contrast to the case of instrumental data, the procedures for epicentral parameter determination (coordinates and I0) from macroseismic data are not very well established. Although there are some "rules", upon which most seismologists agree (centre of the isoseismal of largest degree, and so on), the practical application of, such rules displays many problems. Therefore, it is commonly seismologists' practice to find their own pro cedures and solutions; this is particularly evident in the more complicated cases, Such as offshore epicentres or, as in many cases of historical earthquakes, poor sets of data. One of the major consequences is that parametric catalogues are not homogeneous with respect to macroseismic parameters; moreover, merging catalogues compiled according to different criteria can introduce high noise in any catalogue built in such a way. In order to survey the current practice of epicentre determination from macroseismic data in Europe, a set of cases was distributed to the participants of the first meeting of the ESC WG "Macroseismology". A comparison of the 15 sets of results provided by 16 authors, who gave their own solutions and the explanation., of the adopted procedures is given, showing that in some cases the ideas and results are rather distant.
    Beschreibung: JCR Journal
    Beschreibung: open
    Schlagwort(e): macroseismic data ; epicentre ; intensity ; 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Format: 4567205 bytes
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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