Rete di Pronto Intervento satellitare

Nell’ambito dell’attività di ricerca e monitoraggio dell’INGV, riveste notevole importanza la Rete Sismica Nazionale RSN, quale struttura di sorveglianza sismica del territorio italiano. La rete, che ad oggi conta più di 240 stazioni uniformemente distribuite su tutto il territorio italiano, si avvale di una rete di pronto intervento (RPI) che ha l’obiettivo primario di incrementare, in zona epicentrale, il numero di stazioni, per una migliore localizzazione della sequenza sismica in corso. Per giungere a quest’obiettivo, l’intera struttura utilizza dei sistemi di trasmissione dati dedicati, che permettono di trasmettere i dati in tempo reale presso il centro di acquisizione di Roma, affinché possano essere utilizzati ai fini del processo di localizzazione.PublishedTrieste, Italy1.1. TTC - Monitoraggio sismico del territorio nazionaleope

Sturmian bases for two-electron systems in hyperspherical coordinates

We give a detailed account of an $\it{ab}$ $\it{initio}$ spectral approach for the calculation of energy spectra of two active electron atoms in a system of hyperspherical coordinates. In this system of coordinates, the Hamiltonian has the same structure as the one of atomic hydrogen with the Coulomb potential expressed in terms of a hyperradius and the nuclear charge replaced by an angle dependent effective charge. The simplest spectral approach consists in expanding the hyperangular wave function in a basis of hyperspherical harmonics. This expansion however, is known to be very slowly converging. Instead, we introduce new hyperangular sturmian functions. These functions do not have an analytical expression but they treat the first term of the multipole expansion of the electron-electron interaction potential, namely the radial electron correlation, exactly. The properties of these new functions are discussed in detail. For the basis functions of the hyperradius, several choices are possible. In the present case, we use Coulomb sturmian functions of half integer angular momentum. We show that, in the case of H$^-$, the accuracy of the energy and the width of the resonance states obtained through a single diagonalization of the Hamiltonian, is comparable to the values given by state-of-the-art methods while using a much smaller basis set. In addition, we show that precise values of the electric-dipole oscillator strengths for $S\rightarrow P$ transitions in helium are obtained thereby confirming the accuracy of the bound state wave functions generated with the present method.Comment: 28 pages, 4 figure

“Operazione Blue Mountains 2008”: la partecipazione dell’INGV all’esercitazione della Protezione Civile della Regione Marche (23-25 maggio 2008)

Dal 23 al 25 maggio 2008, la località Pian Di Pieca di San Ginesio in provincia di Macerata (Marche), è stata lo scenario della prima esercitazione sul rischio sismico, a valenza regionale, organizzata dal Dipartimento per le Politiche Integrate di Sicurezza e per la Protezione Civile (DSPC) della Regione Marche. L’esercitazione, denominata “Operazione Blue Mountains 2008”, aveva lo scopo di simulare la risposta degli enti locali nel caso di un evento sismico classificato come “severo”. La manifestazione ha visto la partecipazione di circa 700 volontari della Protezione civile, 200 tra Croce Rossa e Associazioni del volontariato, 70 Vigili del Fuoco provenienti dai diversi comandi delle Marche e più di 20 agenti del Corpo Forestale dello Stato e delle Forze dell’Ordine. Tutti sono stati coordinati dalla Sala Operativa Unificata Permanente della regione (SOUP), in contatto con la Sala Operativa Integrata (SOI) dell’Amministrazione Provinciale di Macerata, il Centro Operativo Intercomunale (COI) e il Dipartimento Nazionale della Protezione Civile. All’esercitazione ha aderito anche l’Istituto Nazionale di Geofisica e Vulcanologia (INGV) che è intervenuto con la nuova struttura di Pronto Intervento del Centro Nazionale Terremoti (CNT) che si attiva in occasione di un forte terremoto (generalmente per terremoti di magnitudo superiore a 5 sul territorio nazionale). Oltre a simulare le diverse fasi d’intervento che l’Istituto si troverebbe ad affrontare in caso di emergenza, l’INGV ha prodotto anche lo scenario sismico su cui è stata basata l’intera l’esercitazione. Scopo di questo breve rapporto tecnico è raccontare come l’INGV ha operato durante l’ “Operazione Blue Mountains 2008” sin dall’invito offertoci dal DSPC della Regione Marche. Saranno descritte le difficoltà incontrate e le soluzione adottate, evidenziando come questa importante esperienza sia diventata un fondamentale test per la nuova struttura di Pronto Intervento dell’INGV.Istituto Nazionale di Geofisica e VulcanologiaPublished1.1. TTC - Monitoraggio sismico del territorio nazionaleope

Rapid response to the earthquake emergency of May 2012 in the Po Plain, northern Italy

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In-Situ Assessment of PAHs in Contaminated Marine Sediments

Abstract The aim of this study is to evaluate a new configuration of the passive sampler Chemcatcher as probe for predicting the bioavailability of persistent organic pollutants in marine sediments. In the new configuration the sampler can work with the principles of measurement of Diffusive Gradient in Thin film (DGT) technique. The present study examines the kinetic of desorption and degradation of three Polycyclic Aromatic Hydrocarbons (PAHs), anthracene, pyrene and benzo[a]pyrene, in two different marine sediments. The free dissolved PAHs in the sediment pore water were also determined. The results suggest that the kinetically labile solid-phase pool of the PAHs, perceived by the DGT measurement, plays an important role in biodegradation processes along with the free dissolved PAHs in the sediment pore water

Site amplification in the epicentral area of the 31/10/2002 earthquake (Molise, Italy): comparison between damage data, microtremors, weak- and strong-motions

On October 31st and November 1st 2002 the Basso Molise area (Southern Italy) was struck by two moderate magnitude earthquakes (M = 5.3 and 5.4). The epicentral area showed a high level of damage, attributable both to the high vulnerability of existing buildings and to site effects due to the geo-morphological setting. In order to detect the main cause of the severe building loss, damage and vulnerability distributions were analyzed, together with microtremors and weak motion monitoring, in several municipalities located in the epicentral area (Bonefro, S. Croce di Magliano, S. Giuliano di Puglia and Colletorto). A limited number of strong motion recordings from the most severe aftershocks were also available for Bonefro and S. Giuliano. We initially evaluated the site response by H/V ratios performed on microtremors. The low reliability of the Nakamura method in detecting the absolute amplification level drove us to the adoption of other techniques. With the purpose of understanding the site amplification influence on the damage caused by the main shock, we installed a local network to record weak motions and perform standard spectral ratios with a reference site and single station H/V ratios. Finally, the damage and vulnerability distributions in the building stock were derived from the database of the post-event survey Also the normalized damage was calculated to better understand the separate contribution of vulnerability and site amplification to the actual macroseismic intensity observed in each municipality, and to identify some still open questions

Microplastics and Polycyclic Aromatic Hydrocarbons Occurrence in a Demersal Fish (Solea solea) in the Adriatic Sea

none8In recent years, microplastics (MPs) are emerging contaminants ubiquitously present in all the compartments of the aquatic ecosystem from surface water to benthic sediment, including aquatic biota. In the aquatic system, MPs pose serious hazards to marine organisms, causing damage by contact, ingestion and uptake. Evidence of MPs ingestion is well documented in marine organisms and harmful consequences of MPs to biota may also derive from the possible transfer of chemicals associated to the plastic debris, especially persistent organic pollutants (POPs), such as polycyclic aromatic hydrocarbons (PAHs). To date, many studies are focusing on the interaction between MPs and POPs, concerning sorption processes and competitive behaviour of chemicals onto MPs, however most of them are experimental studies and very few field studies have been carried out on wild organisms. In the present field study, the most commonly found plastic polymers (polyvinyl chloride [PVC], polypropylene [PP], polyethylene [PE], polyester [PET] and polyamide [PA]) and PAH congeners (phenanthrene [Phe], fluoranthene [Flu] and pyrene [Py]) were analysed in wild sole (Solea solea) caught in the Adriatic Sea. MPs were evaluated in the gastrointestinal tract of the fish, while PAHs were evaluated in sediments and several fish tissues (gills, liver and fillet).noneFrapiccini, Emanuela; Pellini, Giulio; Gomiero, Alessio; Scarcella, Giuseppe; Guicciardi, Stefano; Annibaldi, Anna; Betti, Mattia; Marini, MauroFrapiccini, Emanuela; Pellini, Giulio; Gomiero, Alessio; Scarcella, Giuseppe; Guicciardi, Stefano; Annibaldi, Anna; Betti, Mattia; Marini, Maur

Microplastics and polycyclic aromatic hydrocarbons occurrence in a demersal fish (Solea solea) in Northern Adriatic Sea.

In recent years, microplastics (MPs) are emerging contaminants ubiquitously present in all the compartments of the aquatic ecosystem from surface water to benthic sediment, including aquatic biota. In the aquatic system, MPs pose serious hazards to marine organisms, causing damage by contact, ingestion and uptake. Evidence of MPs ingestion is well documented in marine organisms and harmful consequences of MPs to biota may also derive from the possible transfer of chemicals associated to the plastic debris, especially persistent organic pollutants (POPs), such as polycyclic aromatic hydrocarbons (PAHs). To date, many studies are focusing on the interaction between MPs and POPs, concerning sorption processes and competitive behaviour of chemicals onto MPs, however most of them are experimental studies and very few field studies have been carried out on wild organisms. In the present field study, the most commonly found plastic polymers (polyvinyl chloride [PVC], polypropylene [PP], polyethylene [PE], polyester [PET] and polyamide [PA]) and PAH congeners (phenanthrene [Phe], fluoranthene [Flu] and pyrene [Py]) were analysed in wild sole (Solea solea) caught in the Adriatic Sea. MPs were evaluated in the gastrointestinal tract of the fish, while PAHs were evaluated in sediments and several fish tissues (gills, liver and fillet)

Rete di Pronto Intervento satellitare

Nell’ambito dell’attività di ricerca e monitoraggio dell’INGV, riveste notevole importanza la Rete Sismica Nazionale RSN, quale struttura di sorveglianza sismica del territorio italiano. La rete, che ad oggi conta più di 240 stazioni uniformemente distribuite su tutto il territorio italiano, si avvale di una rete di pronto intervento (RPI) che ha l’obiettivo primario di incrementare, in zona epicentrale, il numero di stazioni, per una migliore localizzazione della sequenza sismica in corso. Per giungere a quest’obiettivo, l’intera struttura utilizza dei sistemi di trasmissione dati dedicati, che permettono di trasmettere i dati in tempo reale presso il centro di acquisizione di Roma, affinché possano essere utilizzati ai fini del processo di localizzazione