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Authors: | Lolli, Barbara* Randazzo, Daniele* Vannucci, Gianfranco* Biondini, Emanuele* Gasperini, Paolo* |
Title: | Homogenization of magnitudes of the ISC Bulletin | Journal: | Geophysical Journal International | Series/Report no.: | 3/234 (2023) | Publisher: | Oxford Academic | Issue Date: | 18-Apr-2023 | DOI: | 10.1093/gji/ggad164 | Keywords: | Statistical methods Statistical seismology Earthquake source observations |
Subject Classification: | Seismology | Abstract: | We implemented an automatic procedure to download the hypocentral data of the online Bulletin of the International Seismological Centre (ISC) in order to produce in near real-time a homogeneous catalogue of the Global and EuroMediterranean instrumental seismicity to be used for forecasting experiments and other statistical analyses. For the interval covered by the reviewed ISC Bulletin, we adopt the ISC locations and convert the surface wave magnitude (Ms) and short-period body-wave magnitude (mb) as computed by the ISC to moment magnitude (Mw), using empirical relations. We merge the so obtained proxies with real Mw provided by global and EuroMediterranean moment tensor catalogues. For the most recent time interval (about 2 yr) for which the reviewed ISC Bulletin is not available, we do the same but using the preferred (prime) location provided by the ISC Bulletin and converting to Mw the Ms and mb provided by some authoritative agencies. For computing magnitude conversion equations, we use curvilinear relations defined in a previous work and the chi-square regression method that accounts for the uncertainties of both x and y variables. | Description: | This article has been accepted for publication in Geophysical Journal International ©:The Author(s) 2023. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.Uploaded in accordance with the publisher's self-archiving policy. All rights reserved. |
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