In this paper we calibrate a duration magnitude scale for the Irpinia Seismic Network (ISNet) in Southern Italy. Analyzing a database of 880 earthquakes with magnitude ranging from 0.5 to 4.5, we obtained the relationship Md= ??? 4.99 (± 0.28) + 4.53 (± 0.17) ??? log ?? + Sc being ?? the signal duration in seconds and Sc a corrective coefficient that has been estimated for each seismic recording station used in our study. This duration magnitude scale well correlates with the local magnitude scale developed for the ISNet network. We developed an automatic procedure to measure the signal duration, so that a rapid and reliable estimate of the earthquake size can be obtained from the observed duration of the seismogram. Finally, we propose a simple and intuitive application of the duration magnitude that can be used at each single station to broadly estimate its relative distance from the recorded earthquake, and at a local network of stations to automatically discriminate events occurring within it from those occurring outside the network.

A duration magnitude scale for the Irpinia Seismic Network, Southern Italy / Colombelli, S.; Emolo, Antonio; Zollo, Aldo. - In: SEISMOLOGICAL RESEARCH LETTERS. - ISSN 0895-0695. - 85:1(2014), pp. 98-107. [10.1785/0220130055]

A duration magnitude scale for the Irpinia Seismic Network, Southern Italy

S. Colombelli;EMOLO, ANTONIO;ZOLLO, ALDO
2014

Abstract

In this paper we calibrate a duration magnitude scale for the Irpinia Seismic Network (ISNet) in Southern Italy. Analyzing a database of 880 earthquakes with magnitude ranging from 0.5 to 4.5, we obtained the relationship Md= ??? 4.99 (± 0.28) + 4.53 (± 0.17) ??? log ?? + Sc being ?? the signal duration in seconds and Sc a corrective coefficient that has been estimated for each seismic recording station used in our study. This duration magnitude scale well correlates with the local magnitude scale developed for the ISNet network. We developed an automatic procedure to measure the signal duration, so that a rapid and reliable estimate of the earthquake size can be obtained from the observed duration of the seismogram. Finally, we propose a simple and intuitive application of the duration magnitude that can be used at each single station to broadly estimate its relative distance from the recorded earthquake, and at a local network of stations to automatically discriminate events occurring within it from those occurring outside the network.
2014
A duration magnitude scale for the Irpinia Seismic Network, Southern Italy / Colombelli, S.; Emolo, Antonio; Zollo, Aldo. - In: SEISMOLOGICAL RESEARCH LETTERS. - ISSN 0895-0695. - 85:1(2014), pp. 98-107. [10.1785/0220130055]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/560937
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