Options
Rovida, Andrea
Loading...
Preferred name
Rovida, Andrea
Alternative Name
Rovida, Andrea Nicola
Email
andrea.rovida@ingv.it
Staff
staff
ORCID
Scopus Author ID
16230959400
79 results
Now showing 1 - 10 of 79
- PublicationOpen AccessASMI, the Italian node of the European Archive of Historical Earthquake Data (AHEAD)(2016-09)
; ; ; ; ; ; ; AHEAD, the European Archive of Historical Earthquake Data (Locati et al., 2014), is a well-established Web portal providing data on the long-term seismic history of the Euro-Mediterranean region. Long before the release of AHEAD, a similar data archive for the Italian territory was established for the com- pilation of multiple releases of the Italian parametric earthquake catalogue (CPTI), and the related macroseismic intensity database (DBMI). If CPTI and DBMI are updated on a multiannual base, the underlying archive is continuously updated with newly released data from parametric catalogues, sets of macroseismic datapoints, and seismological studies. The archive was never made public, and therefore confined to an internal use only. As AHEAD, ASMI allows the user to compare all available (published) studies and their (possibly) different interpretation. Such a comparison is of fundamental importance for the selection of the input data for the compilation of a reliable seismic catalogue. The recent release of CPTI15 and DBMI15, the latest versions of the Italian catalogue and database, benefitted from a massive update and of the content of ASMI with data and studies recently published (up to 2015) regarding a large number of Italian earthquakes. The archive contains today more than 20’000 records on about 6’000 earthquakes in the time period 1000-2014, derived from more than 400 studies. Given such a major effort in updating the archive content, the working group decided that it was worth to finalize the archive structure and prepare a Web user interface for making such a wealth of data accessible and usable by everybody. ASMI has an additional level of complexity with respect to AHEAD, due to the longer time-window covering the entire XX century, and more detailed information on localities related to MDPs. These factors lead to additional data-types, relations, and requirements, that had to be implemented in the infrastructure, together with additional functionalities in the user interface for interacting with such new features. ASMI will represent the Italian node of AHEAD, and consequently the content related to the Italian peninsula will be the same in the shared time-window 1000-1899, while the period 1900-2014 will only be accessible via the ASMI Web portal.125 23 - PublicationOpen AccessComparison Between Two Methodologies for Assessing Historical Earthquake Parameters and Their Impact on Seismicity Rates in the Western AlpsWe investigate the differences in seismicity rate estimates from two historical earthquake catalogues obtained with two methodologies (Boxer and QUake-MD) calibrated on a common dataset of macroseismic intensities and calibration events. The two methodologies were then applied to a test data set of historical earthquakes covering the France, Italy and Switzerland Alpine region. Differences between the resulting magnitude estimates and instrumental magnitudes show a standard deviation of 0.4 for both methodologies, with a mean residual of 0.01 for Boxer and − 0.04 for Quake-MD. A systematic difference in magnitude estimates between the two methodologies that correlates with the depth estimated by Quake-MD has been observed. This is attributed to the difference in the treatment of the depth parameter between Boxer and QUake-MD. Nevertheless, differences in magnitude estimates between the two methodologies show a mean residual of 0.006 and a standard deviation of 0.35 resulting in seismicity rates that are not significantly different considering the associated uncertainties. Such results made us believe that the European community could gain in the reduction of epistemic uncertainties associated with the estimate of historical earthquake parameters by agreeing on a common macroseismic and calibration dataset across borders. These efforts should be strongly encouraged. On the other hand, we show that even in the ideal conditions of this benchmark (same calibration events and same macroseismic intensity dataset), methodological differences can lead to systematic differences in magnitude estimates. It is therefore paramount to explore different methodologies for a more realistic quantification of the epistemic uncertainties in estimates of maximum magnitudes and seismic activity rates.
237 28 - PublicationRestrictedInsights into Preinstrumental Earthquake Data and Catalogs in Europe(2020)
; ; ; ; ; ; ; In current catalogs, the parameters of preinstrumental earthquakes represent the final synthesis of earthquake records of very different type, quality, and reliability. Parameters may be derived from actual and contemporary observations of earthquake effects interpreted as intensity distributions or may be supplied by later seismological studies and descriptive catalogs, consisting of the reinterpretation of already interpreted accounts. The content of earthquake catalogs results from piling data of different origin, interpreted according to diverse approaches. Consequently, the homogeneity and reliability of earthquake parameters strongly vary from one region or period to another, and it is not as straightforward as assumed by end users. The analysis of the wealth of data in the European Archive of Historical Earthquake Data (AHEAD) evidences many differences in their typology and update of the studies supporting European preinstrumental earthquake catalogs, for both moderate and large earthquakes, over a period of 1000 yr.763 3 - PublicationOpen AccessThe ShakeMap Atlas of Historical Earthquakes in Italy: Configuration and Validation(2024)
; ; ; ; ; ; ; ; ; ; ; Italy has a long tradition of studies on the seismic history of the country and the neighboring areas. Several archives and databases dealing with historical earthquake data—primarily intensity data points—have been published and are constantly updated. Macroseismic fields of significant events are of foremost importance in assessing earthquake effects and for the evaluation of seismic hazards. Here, we adopt the U.S. Geological Survey (USGS)‐ShakeMap software to calculate the maps of strong ground shaking (shakemaps) of 79 historical earthquakes with magnitude ≥6 that have occurred in Italy between 1117 and 1968 C.E. We use the macroseismic data published in the Italian Macroseismic Database (DBMI15). The shakemaps have been determined using two different configurations. The first adopts the virtual intensity prediction equations approach (VIPE; i.e., a combination of ground‐motion models [GMMs] and ground‐motion intensity conversion equations [GMICEs]; Bindi, Pacor, et al., 2011; Oliveti et al., 2022b). The second exploits the intensity prediction equations (IPE; Pasolini, Albarello, et al., 2008; Lolli et al., 2019). The VIPE configuration has been found to provide more accurate results after appraisal through a cross‐validation analysis and has been applied for the generation of the ShakeMap Atlas. The resulting maps are published in the Istituto Nazionale di Geofisica e Vulcanologia (INGV) ShakeMap (see Data and Resources; Oliveti et al., 2023), and in the Italian Archive of Historical Earthquake Data (ASMI; see Data and Resources; Rovida et al., 2017) platforms.327 57 - PublicationRestrictedEarthquakes in southern Dalmatia and coastal Montenegro before the large 6 April 1667 eventThe fourteenth to seventeenth century seismicity of southern Dalmatia (Croatia) and coastal Montenegro deserved to be fully reappraised because of the ascertained imperfect knowledge offered by modern seismological studies and of the awareness of the smokescreen effect due to the large 6 April 1667 M 6.4 earthquake that impacted exactly the area of study. The investigation consisted of (i) a reconsideration of earthquake records made available by previous studies and (ii) a systematic analysis of historical sources con- temporary to the earthquakes, especially those not yet taken into account in seismological studies. The 168 contemporary and independent records collected cast a different light on more than 300 years of seismicity of this area. Records are reckoned to be unevenly distributed among the 39 studied earthquakes, out of which 15 still rely upon a single testimony. Each record has been reevaluated with respect to its content and attributed a level of reliability, which for those reporting other 14 events was so low to prevent us from confirming their real occurrence. Completely unreliable records have been identified and discussed, to conclude that they are at the root of five fake earthquakes. Altogether, 34 intensity values in EMS-98 were assessed related to 15 moderate and five damaging earthquakes. Existing and newly obtained data contributed to putting the pre-1667 seismicity of southern Dalmatia and coastal Montenegro into a substantially different perspective.
548 8 - PublicationOpen AccessA WebGIS tool for the dissemination of earthquake data(2006)
; ; ; ; ; ; ;Locati, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Meletti, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Rovida, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Rubbia, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Ercolani, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia ;Meroni, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia; ; ; ; ; In 2004 a new seismic hazard map of Italy (MPS Working Group, 2004) has been released by a task force that produced an amount of new or updated data, such as a new version of the earthquake catalogue (CPTI04; CPTI Working Group, 2004) and an updated seismogenic zonation. A set of WebGIS tools has been designed for the data dissemination to the scientific community and the general public. The design of the WebGIS tools focused first on the consultation of the DBM04 macroseismic database (DBM Working Group, 2005), which contains the macroseismic intensity data-points (IDP) of the earthquakes listed in the CPTI04 catalogue. The WebGIS tool design and development process had to fulfill: 1) simplicity, 2) responsiveness and 3) readiness for future extensions. The specific requirements for the macroseismic database consultation interface were: - data access by place and by earthquake; - IDP maps with queryable points; - data download in both tabular and map format; - easily upgradable content; - quick and user friendly interface.304 616 - PublicationOpen AccessEvidence of active inverse faulting in the north-eastern sector of the Calabrian arc (Italy)(2008-09-07)
; ; ; ; ; ; ; ; ; ;Gori, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Fubelli, G.; Università degli Studi Roma Tre, Dipartimento di Scienze Geologiche, Roma, Italia ;Falcucci, .; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Dramis, F.; Università degli Studi Roma Tre, Dipartimento di Scienze Geologiche, Roma, Italia ;Galadini, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Galli, P.; Dipartimento della Protezione Civile, Roma, Italia ;Rovida, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Messina, P.; Consiglio Nazionale della Ricerche, Istituto di Geologia Ambientale e Geoingegneria, Roma, Italia ;Robustelli, G.; Università della Calabria, Dipartimento di Scienze della Terra, Cosenza, Italia; ; ; ; ; ; ; ; The Calabrian arc represents an accretionary wedge located between the southern Apennines and the Maghrebian chain from which it is separated by two regional shear zones, i.e. the “Pollino Line” and “Taormina Line”, respectively. Since the Pliocene, extension affected the Calabrian chain, determining the formation of normal faults systems. Paleoseismological investigations allowed to associate some of the strongest historical earthquakes occurred in the Calabrian region (Mw up to 7.5) to some of these normal faults. We analyse the north-eastern sector of the arc which is characterised by a complex structural setting, being affected by the Pollino Line. Indeed, an ~E-W trending fault system (Rossano Fault) cut the area. This fault system displays a complex kinematic history, with the superimposition, during the Quaternary, of a normal kinematics over an older strike-slip one. About two km SE of the Mirto village, an excavation exposed marine deposits, attributed by means of paleontological analyses to an age not older than the Lower Pleistocene, overlain by alluvial-colluvial sediments. These deposits have been deformed by a compressive, NW-SE trending fault, verging landwards. The continental sediments affected by the fault have been radiocarbon dated between 10.018±43 BP and 8397±47 BP. This fault may represent the surficial expression of 1) a splay of a back-thrust, related to a main active thrust verging towards NE or 2) an active NW-SE transpressive fault or 3) a local compressive deforma-tion (i.e. a restraining bend) related to an active strike-slip fault. Works are still in progress in order to define the relationship of this compressive fault with the near Rossano fault, to which Galli et al (2006d) attributes a Late Holocene normal activity, considering that this sector has been struck in 1836 by a strong earthquake (Mw=6.2), the causative fault of which has been only tentatively related to the aforementioned Rossano fault.252 162 - PublicationRestrictedLate Quaternary kinematics, slip-rate and segmentation of a major Cordillera-parallel transcurrent fault: The Cayambe-Afiladores-Sibundoy system, NW South America(2007)
; ; ; ;Tibaldi, A.; Università di Milano-Bicocca ;Rovida, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Corazzato, C.; Università di Milano-Bicocca; ; We describe the recent activity of the Cayambe-Afiladores-Sibundoy Fault (CASF) and recognise it as one of the major potential active structures of northwestern South America, based on field observations, stereoscopic aerial photos of offset late Pleistocene-Holocene deposits and landforms, and crustal seismic activity. The CASF runs for at least 270 km along the sub-Andean zone of northern Ecuador and southern Colombia. We measured systematic latest Pleistocene-Holocene right-lateral strike-slip motion and right-lateral reverse motion consistent with earthquake focal mechanism solutions, and estimated a 7.7 +/- 0.4 to 11.9 +/- 0.7 mm/yr slip-rate. Magnitudes of the earthquakes that could be generated by possible fault-segment reactivation range up to M 7.0 +/- 0.1. The CASF should be considered as a major source of possible future large magnitude earthquakes, presenting a seismic hazard for the densely populated regions to the west. The CASF is part of the tectonic boundary of the North Andean block escaping NNE-wards with respect to the stable South American plate.171 32 - PublicationOpen AccessDBMI04, il database delle osservazioni macrosismiche dei terremoti italiani utilizzate per la compilazione del catalogo parametrico CPTI04(2007)
; ; ; ; ; ; ; ; ; ;Stucchi, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Camassi, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia ;Rovida, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Locati, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Ercolani, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia ;Meletti, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Migliavacca, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Bernardini, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia ;Azzaro, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia; ; ; ; ; ; ; ; This paper describes the main features of the Macroseismic Database of Italy 2004, which for the first time put together in a critical way the macroseismic data used for the compilation of the CPTI04 (2004) parametric earthquake catalogue. Data come from varied main datasets: i) DOM4.1 (Monachesi e Stucchi, 1997); ii) CFTI version 2 (Boschi et al., 1997) and, for the time-window 1980-2002, CFTI version 3 (Boschi et al., 2000); iii) Bollettino Macrosismico ING (BMING); iv) Catalogo Macrosismico dei Terremoti Etnei, Azzaro et al. (2000; 2002). In addition, data from recent historical and field investigation were also used. DBMI04 contains 58146 macroseismic observations related to 1041 earthquakes and 14161 localities, 12943 of which in Italy. The input data used for the compilation of DBMI04 were not homogeneous with respect to the use of the intensity scale and, mainly, to geographical reference. One of the main task was the organisation of a reliable geographical reference, based on the previous ENEL-ISTAT catalogue of the Italian localities (ENEL, 1978), which was updated by means of new data. Another task consisted in correcting some mistakes performed when associating the placenames quoted by the historical sources and the geographical reference. Some problems were solved using ad hoc conventions for dealing with observations not expressed in terms of macroseismic intensity. This paper presents the adopted solutions and the results, together with the web-interface through which the database is made available to the public (http://emidius.mi.ingv.it/DBMI04/).1058 946 - PublicationOpen AccessDatabase Macrosismico Italiano DBMI15, versione 2.0(2019-11)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; La versione 2.0 del Database Macrosismico Italiano chiamata DBMI15 è stata rilasciata a novembre 2019 e aggiorna e sostituisce la precedente versione 1.5 (Locati et al. 2016). Le variazioni tra la versione 1.5 e la 2.0 sono dettagliate al paragrafo 6; le variazioni tra le versioni DBMI11 (Locati et al., 2011) e DBMI15 sono descritte al paragrafo 5. DBMI v2.0 fornisce un set di dati di intensità macrosismica relativo ai terremoti italiani aggiornato alla finestra temporale 1000-2017. I dati provengono da studi di autori ed enti diversi, sia italiani che di paesi confinanti (Francia, Svizzera, Austria, Slovenia e Croazia). I dati di intensità macrosismica (MDP, Macroseismic Data Point) sono raccolti e organizzati da DBMI per diverse finalità. La principale è fornire una base di dati per la determinazione dei parametri epicentrali dei terremoti (localizzazione e stima della magnitudo) per la compilazione del Catalogo Parametrico dei Terremoti Italiani (CPTI). L’insieme di questi dati consente inoltre di elaborare le “storie sismiche” di migliaia di località italiane (15332 in DBMI15 v2.0), vale a dire l’elenco degli effetti di avvertimento o di danno, espressi in termini di gradi di intensità macrosismica, osservati nel corso del tempo a causa di terremoti. Dato il loro stretto legame, DBMI e CPTI sono stati pubblicati insieme e usano una stessa numerazione (DBMI04-CPTI04, DBMI11-CPTI11), ma in due diversi siti web. A partire da questa versione si è deciso di rendere disponibile le due banche dati DBMI15 e CPTI15 (Rovida et al., 2019) da un unico sito web generato con una versione aggiornata del software MIDOP (Locati e Cassera 2010) al fine di rendere più semplice e funzionale la consultazione.382 117