<> earthquakes: a growing contribution to the Catalogue of Strong Italian Earthquakes

D. Mariotti, A. Comastri, E. Guidoboni

Abstract


The particular structure of the research into historical seismology found in this catalogue has allowed a lot of information about unknown seismic events to be traced. This new contribution to seismologic knowledge mainly consists in: i) the retrieval and organisation within a coherent framework of documentary evidence of earthquakes that took place between the Middle Ages and the sixteenth century; ii) the improved knowledge of seismic events, even destructive events, which in the past had been "obscured" by large earthquakes; iii) the identification of earthquakes in "silent" seismic areas. The complex elements to be taken into account when dealing with unknown seismic events have been outlined; much "new" information often falls into one of the following categories: simple chronological errors relative to other well-known events; descriptions of other natural phenomena, though defined in texts as "earthquakes" (landslides, hurricanes, tornadoes, etc.); unknown tremors belonging to known seismic periods; tremors that may be connected with events which have been catalogued under incorrect dates and with very approximate estimates of location and intensity. This proves that this was not a real seismic "silence" but a research vacuum.

Keywords


Unknown earthquakes;completeness of seismic catalogues

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References


DOI: https://doi.org/10.4401/ag-3667
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X