Some ideas for a databank of macroseismic data

Postpischl, D.; Bellani, A.

doi:10.1016/0040-1951(91)90201-3

Cited by 5 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Grandori and Faccioli also defined a horizontal response spectrum to be used as seismic input for dynamic analyses. The spectrum was obtained by enveloping the horizontal response spectra of actual recorded accelerograms extracted from a database of Italian earthquakes available at the time (Postpischl et al 1991). The selection of the accelerograms was performed by considering magnitudes between 5.4 and 6.8, distances from the source between 24 and 53 km, and the geotechnical/ geological conditions of the site.…”

Section: Previous Studies Of Seismic Inputmentioning

confidence: 99%

Seismic Reassessment of the Leaning Tower of Pisa: Dynamic Monitoring, Site Response, and SSI

et al. 2019

View full text Add to dashboard Cite

The Tower of Pisa survived several strong earthquakes undamaged over the last 650 years, despite its leaning and limited strength and ductility. No credible explanation for its remarkable seismic performance exists to date. A reassessment of this unique case history in light of new seismological, geological, structural, and geotechnical information is reported, aiming to address this question. The following topics are discussed: (1) dynamic structural identification based on recorded earthquake data; (2) geophysical site characterization using a two-dimensional array; (3) seismic hazard and site response analysis considering horizontal and vertical motions; and (4) soil-structure interaction (SSI) analysis calibrated using lab and field data. A substantial shift in natural period, from about 0.35 s to over 1 s (a threefold increase, the largest known for a building of that height) caused by SSI, a wave parameter (1/ σ) of about 0.3, and a minor effect of vertical ground motion are identified and may explain the lack of earthquake damage on the Tower. Recommendations for future research, including the need to establish a seismic bedrock deeper than 500 m, are provided.

show abstract

Section: Previous Studies Of Seismic Inputmentioning

confidence: 99%

Seismic Reassessment of the Leaning Tower of Pisa: Dynamic Monitoring, Site Response, and SSI

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Historical seismology is not new to the use of advanced solutions for organizing archives of historical data (Godefroy et al 1990;Postpischl et al 1991;Boschi et al 1996), but some time has passed since a new experimental attempt was conducted in the field. The core of this research work is to review how historical seismologists deal with the various data types retrieved in their historical research process, map their relations, and to design a tool able to support the entire research process.…”

Section: Introductionmentioning

confidence: 99%

A prototype HGIS for managing earthquake data from historical documents

Migliaccio

Locati

Carrión

et al. 2018

Geomatics, Natural Hazards and Risk

View full text Add to dashboard Cite

Studies regarding historical seismic events occurred during the preinstrumental era are mostly based on the interpretation of coeval records reporting earthquake effects on humans and buildings as experienced and reported by witnesses. Historical sources typically consist of written documents such as letters, newspapers articles, chronicles and memoirs that survived the passage of time; from these documents and their historical context, seismologists isolate the relevant descriptive information on the effects of a seismic event in a place. This information is required to estimate a macroseismic intensity, in turn, used as input to assess the earthquake parameters such as the epicentre location and magnitude. Historical seismologists feel the need of a system for organizing the huge amount of data retrieved in their research, and able to keep trace of the complex relations among these data. A tool addressing these needs may well be used to perform the opposite action: being able to trace back each step of the research procedure, enabling seismologists checking the reliability of the background data, spotting potential errors or potential misinterpretations, and, possibly, to enrich and consolidate the description of an earthquake. This work, carried out with the collaboration of an experienced historical seismologist, investigates the peculiar needs of this field of research and proposes new tools, which are based on a Geographical Information System (GIS). Finally, a prototype system is presented. This solution enables to store, manage and analyse spatial and thematic data related to historical earthquakes, and integrates the relevant data resulting from seismic studies and from their original source documents. In particular, the conceptual model of the GIS spatial database is described and some examples of maps and queries are discussed for a case study represented by two earthquakes which occurred in Locris (Greece) on the 20 th and 27 th April 1894.

show abstract

“…La macrosísmica conduce al conocimiento de las particularidades fenomenológicas de los terremotos, en especial los parámetros de localización hipocentral, zonas de daños, extensión horizontal y vertical de la ruptura, mecanismo focal, momento sísmico y la atenuación de la intensidad(Salcedo, 2002). De esta forma, estos estudios generan datos e información que tienen carácter de complementariedad frente a los datos instrumentales; de manera que con ellos también se alimentan los catálogos sísmicos de una región sismoactiva(Postpischl et al, 1991).En su mayoría, los sismos ocurridos en periodos preinstrumentales resultan ser de mayor intensidad que los recientes, por lo cual en muchas regiones del mundo no se conocen los sismos grandes que las han afectado, quedando un vacío substancial en el conocimiento sísmico de las grandes intensidades y su periodo de retorno, lo que dificulta la evaluación confiable del peligro sísmico(Guidoboni and Stucchi, 1993).Entonces, de los estudios macrosísmicos sobre un terremotos particular se espera el aporte en la determinación de parámetros sismológicos que llenen el vacío que tiene los catálogos por la carencia de redes sísmicas o por el corto periodo de registro instrumental. Con este propósito se llevó a cabo este estudio que presenta datos sismológicos relevantes para la interpretación del área de…”

unclassified

Contribución Al Análisis Macrosísmico Del Terremoto Del 7 De Junio De 1925: Principales Efectos en La Ciudad De Cali

Salcedo Hurtado,

Romero Vergara,

Vallejo Chocué

2023

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

View full text Add to dashboard Cite

Uno de los terremotos históricos importantes ocurridos en Colombia tuvo lugar el 7 de junio de 1925. A pesar de figurar en el catálogo sísmico mundial con magnitud de 6.75 (Gutenberg y Richter, 1954) y haber causado daños relevantes en la ciudad de Cali y otros centros urbanos del suroccidente, no ha sido objeto de suficientes investigaciones macrosísmicas. Recientemente, varios investigadores han realizado algunos estudios de relocalización instrumental que intentan evaluar su posible fuente sismogénica, sin que este problema se haya resuelto definitivamente. El presente trabajo, como contribución macrosísmica, utiliza fuentes documentales (archivos históricos, prensa y bibliografía) para describir los principales efectos en diferentes poblaciones, especialmente en la ciudad de Cali, donde se elabora un mapa de localización de la zona con mayores daños. En términos de la escala EMS-98 se evalúa la intensidad macrosísmica y el factor de calidad (Q) para cada lugar, mostrándose también el respectivo mapa de intensidades. Cabe anotar que la información procesada aún no permite elaborar un mapa de isosistas confiable, ni establecer con precisión parámetros como la intensidad epicentral, el epicentro macrosísmico, la profundidad y la relación de atenuación, dejándose abierta una ventana de investigación macrosísmica más profunda acerca de este terremoto.

show abstract

Some ideas for a databank of macroseismic data

Cited by 5 publications

References 1 publication

Seismic Reassessment of the Leaning Tower of Pisa: Dynamic Monitoring, Site Response, and SSI

Seismic Reassessment of the Leaning Tower of Pisa: Dynamic Monitoring, Site Response, and SSI

A prototype HGIS for managing earthquake data from historical documents

Contribución Al Análisis Macrosísmico Del Terremoto Del 7 De Junio De 1925: Principales Efectos en La Ciudad De Cali

Contact Info

Product

Resources

About