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Comment on "Two Foreshock Sequences Post Gulia and Wiemer (2019)" by Kelian Dascher-Cousineau, Thorne Lay, and Emily E. Brodsky
Full text linkISSN:0895-0695ISSN:1938-2057ISSN:1938-205
Detection of quarry and mine blast contamination in European regional catalogues
No full textSeismic catalogues often include man-made contaminations, that range from the changes in seismic networks operating in the region to the different processing of the data and to the inclusion of quarry explosions and marine shots. For example, the installation or closure of seismic stations produce an increase or a decrease in the detection of small events, whilst quarry blasts or mine explosions artificially enrich catalogues. Despite network operators’ best efforts to identify quarry blasts, it is easy to find these events in a catalogue, whereas the separation between explosion events and tectonic ones is a difficult task.
Detection and removing of artificial events from a seismic catalogue should be the
preliminary step in any analysis of statistical seismology.
Wiemer and Baer (BSSA, 2000) proposed an algorithm, based on a statistical
criterion, to identify and remove quarry explosions from catalogues. It is based on
the observation that quarry blasts generally take place during daytime hours: the areas with a high ratio of daytime and night-time events are likely to be regions with quarry activity.
In the first part of this work (Gulia, NH, 2010) we have modified the method and then tested it, using both a synthetic and a regional catalogue; in the second part the
procedure has been applied to some of the European regional catalogues available on
line.
The comparison between the results obtained and the location of known quarries and mines for the analyzed catalogues confirms both the presence of non-natural events in seismic catalogue and the reliability of the methodology in identifying mining areas.PublishedMontpellier5.2. TTC - Banche dati di sismologia strumentaleope
Gulia Jousseaume 1887
No full textGenus Gulia Jousseaume, 1887b Type species: by subsequent designation of Cossmann (1888), Gulia acutangula (Faujas, 1817), Early Miocene, France.Published as part of Harzhauser, Mathias & Landau, Bernard, 2012, A revision of the Neogene Cancellariid Gastropods of the Paratethys Sea 3472, pp. 1-71 in Zootaxa 3472 on page 2
Uscire ed entrare dalla metamorfosi. Considerazioni sull'animazione negli anni Settanta.
No full textLo 'spazio' della storia: storia dell'arte e storia delle esposizioni a confronto.
No full textAlla fine degli anni Ottanta emergono parallelamente due fenomeni: alla > [Belting, 1983] – ossia alla crisi del modello narrativo occidentale, costruito sul principio dell'evoluzione stilistica – si affiancò infatti un crescente interesse per la storia delle esposizioni e per le fenomenologie dei format espositivi.
Da una parte testi come quello di Bruce Altshuler The Avant-garde in Exhibitions. New Art in the 20t h century (1994); l'antologia curata da Reesa Greenberg, Bruce W. Ferguson e Sandy Nairn Thinking about Exhibitions (1996); o ancora lo studio di Francis Haskell The Ephemeral Museum. Old Master Paintings and the Rise of the Art Exhibition (2000), ognuno dei quali registra l'importanza crescente dei fenomeni espositivi nel dibattito storico-artistico.
Dall'altra la messa in crisi del modernismo come narrazione dominante e l'apertura di nuovi campi discorsivi, tra i quali quello dei world art studies, concetto coniato da John Onians all'inizio degli anni Novanta, come evidenza di una tensione alla produzione di ulteriori modelli di analisi ed interpretazione per la storia dell'arte. Un'operazione non indifferente al dibattito sollevato da mostre come Primitivism in 20th century art (MoMA, 1984) e Magiciens de la Terre (Centre Pompidou, 1989).
Partendo da queste premesse, l'articolo propone una riflessione sul rapporto tra storia dell'arte e storia delle esposizioni così come si è venuto delineando a partire dal periodo indicato, e con una particolare attenzione per le implicazioni che il concetto stesso di esposizione è venuto acquisendo
Time-Space Evolution of the Groningen Gas Field in Terms of b-Value: Insights and Implications for Seismic Hazard
Full text linkThe Groningen gas field, located in the northeast of The Netherlands, is the Europe's larg-est onshore gas field. It was discovered in 1959 and production started in 1963: Continuous production leads to reservoir compaction and subsidence, gradually loading preexisting fault and induced seismicity that started about 30 yr into the production. The seismic hazard and risk related to the induced seismicity is determined not only for the rate of activity, but it is also equally influenced by the relative size distribution of the seismicity-the b -value. I reanalyze the spatial and temporal evolution of the b -value in the field using an alternative approach to overcome magnitude in completeness heterogeneity, and link it to the evolution of fault loading and subsidence. Spatial var-iations of b -values are found to vary between 0.61 and 1.3, with the lowest observed values observed in the location of the 2012 M 3.6 Huizinge earthquake. In the last 10 yr, the mapped b -values are more homogeneous throughout the field. The spatial and temporal evolution of the b -value in the field in this study is shown to be quite com-plex, and systematically linked it to the evolution of fault loading, absolute compaction, and the rate of compaction-an important finding that offers new insights into hazard reduction and mitigation strategies of extraction relation-induced seismicity. Compaction rates below 2 mm/yr are not correlated to seismicity above M 2.0 in the history of the field, suggesting that low-volume production may be safer than that previously assumed
It was not a story to pass on. Il caso di "Harlem on my mind. Cultural Capital of Black America 1900-1968"
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