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  • 11
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    Sismicidad y sismotectónica para el sector norte del ámbito del Sistema de Fallas de Algeciras, Cordillera Oriental, Colombia (2022)
    Details
    Publication Date: 2022-04-28
    Description: Al Sistema de Fallas de Algeciras (SFA), se le han asignado cuatro sismos históricos desde finales del siglo XVIII, que en términos de magnitud recalculada desde análisis macrosísmicos tuvieron una magnitud M〉6.5. Uno de estos, el del 9 de febrero de 1967, fue registrado instrumentalmente con Mw 7.2. En este trabajo se realizó un estudio del sector norte de este sistema de fallas entre los 3° y 4°N. Entre el 31 de octubre de 2016 y el 18 de julio de 2018, se presentaron cuatro sismos con Mw〉4.8, que la Red Sismológica Nacional de Colombia (RSNC) localizó en el municipio de Colombia, departamento del Huila, asignándolos a fallas del SFA. Luego, en diciembre 24 de 2019, se presentó un sismo con Mw 6.0, que se asignó a la Falla Algeciras perteneciente al SFA en el departamento del Meta. En esta investigación se encontró que los sismos de la región de Colombia se produjeron en las fallas Altamira y Nazareth, las cuales son fallas inversas en un contexto tectono - estratigráfico diferente al SFA. El SFA al norte de los 3°N define en esta región el piedemonte llanero. Para las fallas Altamira y Nazareth, los mecanismos focales indicaron fallas inversas, mientras que en la región de Mesetas estos mecanismos obedecieron a fallas transcurrentes concordantes con el SFA. Dada la alta generación de sismos con Mw〉5.0 en estas fallas en un lapso inferior a 10 años, se establece que su potencial sismogénico contribuye de manera importante a la amenaza sísmica del centro y el suroccidente de Colombia, sin embargo, en este trabajo se encontró además que la denominada Falla Algeciras, principal componente del SFA por la literatura, está segmentada y no es continua, por lo que se debe revaluar su potencial sismogénico
    Description: Published
    Description: 111-134
    Description: 3T. Fisica dei terremoti e Sorgente Sismica
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 12
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    Inventario de Daños y Efectos Geológicos Co y/o Post-Sísmicos del Sismo Ocurrido el 18 de mayo de 1875, en la Frontera entre Colombia y Venezuela (2020)
    Details
    Publication Date: 2022-04-28
    Description: On the border between Colombia and Venezuela, have occurred seismic events with important records of damage in both countries. In this paper, we study the historical earthquake that took place on May 18, 1875 between 11.15 and 11.30 in the morning (the time was the same for communities in both countries since there was no time zone difference), which is catalogued as a border earthquake due to the report of damages in the cities of both nations. The community of San José de Cúcuta, current capital of the Northern State of Santander, Colombia, registered the greatest number of deaths and damage to buildings. An inventory of the geological damage and co -seismic and postseismic effects was created based on information of previous studies and data obtained from archival primary sources from Colombia and Venezuela. The result is a bi-national database, which includes the summaries of historical descriptions with the effects in the persons and objects, the geological damages and effects observed during the seismic event. These data has led to the creation of a table of MM and EMS-98 intensities, which enables the identification and delimitation of the regions of greater damages. The maximum level intensity is I=10 in the cities of San José de Cúcuta, Villa del Rosario, Pueblo de Cúcuta (San Luis) in Colombia and San Antonio, San Juan de Ureña in Venezuela. Moreover, we formulated a table of intensities using the ESI-2007 INQUA scale, based on the information of geological observations described in historical documents. These data are related to the epicentral zone with an approximate radius of 30 km.
    Description: Published
    Description: 105-263
    Description: 5T. Sismologia, geofisica e geologia per l'ingegneria sismica
    Description: N/A or not JCR
    Keywords: historical seismicity ; destruction of communities ; Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 13
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    La amenaza sísmica de la Sabana de Bogotá frente a un sismo de magnitud M 〉 7.0, cuyo origen esté en el Piedemonte Llanero (2020)
    Details
    Publication Date: 2022-04-28
    Description: En este trabajo se muestra cómo un gran sismo originado en el Sistema de Fallas de la Falla Frontal de la Cordillera Oriental (SFFFCO) puede causar grandes daños y pérdidas de vidas, tanto en el área metropolitana de Bogotá, D. C., como en el resto de la Sabana de Bogotá. El grado de la amenaza sísmica de la ciudad ante un sismo cercano, originado en el Piedemonte Llanero, cuya distancia es inferior a 250 km y con una magnitud 〉 7.0, es muy alto, si se tiene presente que sus suelos, de origen lagunar, se ubican hacia el occidente y el noroccidente, zonas en las que, durante las dos últimas décadas, se ha ido extendiendo el área metropolitana.
    Description: Published
    Description: 73-91
    Description: 6T. Studi di pericolosità sismica e da maremoto
    Description: N/A or not JCR
    Keywords: seismichazard ; bogota ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 14
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    From macroseismic intensity data to the earthquake parameters (2011)
    Details
    Publication Date: 2017-04-04
    Description: Two tools have been developed within the European Archive of Historical EArthquake Data (AHEAD) in order to process and analyse roughly 270.000 Macroseismic Intensity Data-points (MDPs) related to circa 7000 earthquakes European-wise and spanning more than a 1000 years.The first addressed task was to investigate interactively on a map such data, to better evaluate the quality and differences between datasets describing the same earthquake. A tool called MIDOP (Macroseismic Data Online Publisher) has been created: by simply choosing a list of earthquakes and their corresponding MDPs, a complete self-sustained website can be created, ready to be published on the web. It offers an intuitive control panel for maps and tables customisation and it offers the possibility to generate places seismic histories. No external data-sources are required while presenting maps and the resulting websites can be browsed also locally. A series of problems related to the AHEAD environment have been taken into account while designing the tool: 1) macroseismic intensity data standardisation of formats among European institutions, 2) support the growth of locally developed macroseismic data-centres and 3) help publishing the earthquake data on the web with a specifically designed web-mapping tool.The second task to be addressed was to process such amount of MDPs in order to obtain earthquake parameters (epicentral location and magnitude) according to available and published methods. Three parameterization methods were identified: Boxer, Bakun & Wentworth and MEEP, each coming with its Windows pre-compiled line command executable. The tool, called “Parametrizator”, is able to batch process the input MDPs and present the result on maps using MIDOP.
    Description: Published
    Description: Montpellier (France)
    Description: 5.1. TTC - Banche dati e metodi macrosismici
    Description: open
    Keywords: AHEAD ; macroseismology ; paramters ; intensity ; 04. Solid Earth::04.06. Seismology::04.06.05. Historical seismology ; 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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  • 15
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    Analisis complementario entre parametros instrumentales y macrosismicos: terremoto de mayo 24, 2008 en Quetame, Colombia (2021)
    Details
    Publication Date: 2021-12-22
    Description: The earthquake of May 24th, 2008, occurred in the municipality of Quetame (Colombia), is a recent event detected by the RSNC and the World Seismological Network, which reported their seismological parameters: epicenter, depth, magnitude, scalar seismic moment and focal mechanism, among others. Based on the damages and effects caused, INGEOMINAS (Colombian Geological Survey) evaluated the macroseismic field, preparing the map of intensities with data in various populations of the departments of Cundinamarca, Tolima and Meta, mainly. Based on this macroseismic information, in this work some macroseismic analysis methods are applied to obtain the corresponding focal parameters. The results show strong correlations or similarities between instrumental and macroseismic parameters. Instrumentally reported: Epicenter 4.4°N and 73.81°W; h=14.7 km, 5.9 Mw, 5.9 Ms, 5.6 mb, 5.7 ML; M0=7.95*1024 dynes-cm. While macroseismically it was obtained: Epicenter 4.34°N and 73.86°W; 5.94 Mw, 5.5 Ms, 5.6±0.2 mb, 5.63 ML; hn=12.1 km, hl=2.23 km; E=4.57*1020 erg, M0=9.14*1024 dynes-cm; the parameters of the dimensions of the seismic focus and the seismotectonic deformation expressed by the seismic flow of the rock mass were also determined. The applied procedures show the character of complementarity between instrumental and macroseismic data.
    Description: Published
    Description: 163-184
    Description: 5T. Sismologia, geofisica e geologia per l'ingegneria sismica
    Description: JCR Journal
    Keywords: earthquakes ; focal parameters ; macroseismic ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 16
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    Localización y magnitud del terremoto de 1785 en Colombia calculadas a partir de intensidades macrosísmicas (2020)
    Details
    Publication Date: 2021-12-22
    Description: The earthquake that hit Colombia on July 12, 1785, is one of the seismic events with the highest number of macroseismic studies based on historical sources. Most of these studies have assigned a maximum intensity of VIII to the event. Following the study of Salcedo Hurtado and Castaño Castaño (2011), and applying the Bakun and Wentworth (1997) method and the macroseismic intensity attenuation proposed by Gómez Capera and Salcedo Hurtado (2002), we calculated the magnitude m b = 6.9±0.2 and the macroseismic epicentre at 28 km from Bogotá. The validation of the attenuation model was performed with the instrumental parameters of the earthquake occurred on May 24, 2008, in the same region of the historical earthquake studied in the present article.
    Description: Published
    Description: 206-217
    Description: 6T. Studi di pericolosità sismica e da maremoto
    Description: N/A or not JCR
    Keywords: historical seismicity ; earthquakes ; earthquake parameters ; colombia ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 17
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    Rosetta, a tool for linking accelerometric recordings and macroseismic observations: description and applications (2018)
    Springer
    Details
    Publication Date: 2022-05-24
    Description: Investigating relationships between macroseismic intensity and strong-motion data requires the existence of these two records for the same seismic event and site. In Italy, this comparison is feasible through the cross-matching of the Italian Macroseismic Database (DBMI) and the Italian Strong-Motion Database (ITACA) which are the most comprehensive sources of both data. However, the two databases lack a direct link which would allow performing joint analysis of macroseismic data points and strong-motion recordings, making the comparison a time consuming job for the researcher. This paper demonstrates the usefulness of cross-database identifiers, and presents their use in a webtool called Rosetta, an initial proof-of-concept that helped testing linking procedures among DBMI and ITACA, and user friendly visual solutions. The development allowed the working group to exchange expertise on their respective database structures and workflows, laying the groundwork for a consistent, low-maintenance, and durable solution that will be easily updatable each time a new version of DBMI or ITACA will be released.
    Description: Italian Department of Civil Protection to the project INGV-DPC S2-2014 “Constraining Observations into Seismic Hazard”
    Description: Published
    Description: 2429–2443
    Description: 3T. Storia Sismica
    Description: 4T. Sismologia, geofisica e geologia per l'ingegneria sismica
    Description: 4IT. Banche dati
    Description: JCR Journal
    Keywords: seismology ; macroseismic intensity ; strong-motion ; stations ; historical earthquakes ; database ; identifiers ; 04.06. Seismology ; 05.02. Data dissemination
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 18
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    Relationships between ground motion parameters and macroseismic intensity for Italy (2020)
    Springer
    Details
    Publication Date: 2022-05-24
    Description: The relation between macroseismic intensity and ground shaking makes it possible to transform instrumental Ground Motion Parameters (GMPs) in macroseismic intensity and vice versa, and is therefore useful for making comparisons between estimates of seismic hazard determined in terms of GMPs and macroseismic intensity, and for other engineering and seismological applications. Empirical relationships between macroseismic intensity and different recorded GMPs for the Italian territory are presented in this paper. The coefficients are calibrated using a dataset of horizontal geometrical mean GMPs, i.e. peak ground acceleration (PGA), peak ground velocity (PGV), spectral acceleration (SA) at 0.2, 0.3, 1.0 and 2.0 s from the ITalian ACcelerometric Archive (ITACA; Luzi et al. 2019), and macroseismic intensity at Mercalli-Cancani-Sieberg (MCS) scale from the database DBMI15 (Locati et al. 2019). A dataset was obtained that corresponds to 240 pairs of macroseismic intensity-GMPs from 67 Italian earthquakes in the time window 1972-2016 with moment magnitude ranging from 4.2 to 6.8 and macroseismic intensity in the range [2, 10-11]. The final dataset is developed correlating strong motion stations and macroseismic intensity observations generally within 2 km from each other, but the associations is manually validated through the expert opinion. The adopted functional form is non-linear predicting macroseismic intensity as a function of LogGMPs and vice versa by performing separate regressions. The set of empirical conversion relationships GMP-I MCS -GMP and the associated standard deviations are compared with previous models. The results of an illustrative PSHA, obtained using a new seismogenic zonation (Santulin et al. 2017), proposed as one of the inputs of the new Italian seismic hazard model (Meletti et al. 2017), are used to analyse and compare seismic hazard assessment in terms of PGA and the related seismic hazard map in terms of macroseismic intensity (MCS) obtained using the empirical relationships here proposed for the PGA.
    Description: Published
    Description: 5143–5164
    Description: 6T. Studi di pericolosità sismica e da maremoto
    Description: JCR Journal
    Keywords: macroseismic ; intensity ; groundmotionparameters ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 19
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    Estimating Magnitude and Location from macroseimic data of the 1925 Colombian earthquake (2022)
    OGS
    Details
    Publication Date: 2022-12-01
    Description: The earthquake of 7 June 1925, which occurred in south-western Colombia, is one of the most important intraplate seismic events in the region. This earthquake caused damage at several localities along the Cauca valley. The distribution of the intensity data points reveals a trend line in the SW-NE direction, corresponding to the Andean mountain range, which coincides with the strike of the main geological faults existing in the SW of the country. In this work, earthquake parameters are computed from macroseismic data. The moment magnitude obtained is 6.6 ± 0.2. The epicentre is located at the coordinates 3.29° N and 76.91° W, at approximately 50 km SW from the town of Cali.
    Description: Published
    Description: 377-402
    Description: 5T. Sismologia, geofisica e geologia per l'ingegneria sismica
    Description: JCR Journal
    Keywords: earthquake parameters ; intensity data points ; Cali ; Colombia ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 20
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    Terremoti storici in Anatolia Sud-Orientale: alcuni casi da una ricerca in corso (2023)
    Details
    Publication Date: 2023-03-23
    Description: Questo articolo traduce e compendia parte dei dati contenuti nel sito della Boğaziçi University Kandilli Observatory and Earthquake Research Institute, Department of Earthquake Engineering. Nella pagina relativa ai Rapporti sul terremoto a Kahramanmaraş – Gaziantep del 6 febbraio 2023 (ore 04:17 locali) c’è un Report preliminare dedicato ai forti terremoti storici (Large historical earthquakes of the earthquake-affected region: a preliminary report) a firma di K. Sesetyan, M. Stucchi, V. Castelli e A.A. Gomez Capera, pubblicato il 17 febbraio 2023.
    Description: Boğaziçi University Kandilli Observatory and Earthquake Research Institute, Department of Earthquake Engineering
    Description: Published
    Description: 1-7
    Description: 5T. Sismologia, geofisica e geologia per l'ingegneria sismica
    Keywords: Eastern Anatolia Fault ; Historical earthquakes ; Faglia est-anatolica ; Sismicità storica ; Historical seismicity ; Terremoti storici ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: web product
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