Year: 2022
Type: article
Abstract: A good estimation of the b ‐value is crucial for the earthquake hazard assessment. Its evaluation can be strongly affected by an incorrect estimation of the completeness magnitude m c because a too small m c will reflect into a small b ‐value, whereas a too large m c will imply a larger standard deviation due to the reduction of the magnitude interval. Several methods for the estimation of m c exist, however its evaluation is very delicate and requires some critical decision making in most cases. Here we present a new, very rapid and simple method for m c estimation. It is based on the observation that the Gutenberg‐Richter distribution is an exponential one only for magnitudes larger than m c . As a consequence, the average magnitude m a value should increase linearly with a threshold magnitude m th . The departures from such linear behavior, allows a correct estimation of m c , whereas the linearity of the of m a versus m th allows a correct estimation of the b ‐value.
Source: Earth and Space Science
DOI: 10.1029/2022ea002540
Authors: C. Godano, G. Petrillo
Language: English
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,100
Funders: California Institute of Technology, Ministry of Education, Culture, Sports, Science and Technology, Ministero dell’Istruzione, dell’Università e della Ricerca, Aristotle University of Thessaloniki, Istituto Nazionale di Geofisica e Vulcanologia, Research Committee, Aristotle University of Thessaloniki
OpenAlex ID: W4307223962