@article{ref1,
title="Temporal variation of b value with statistical test in Wenchuan area, China prior to the 2008 Wenchuan Erthquake",
journal="Entropy (Basel, Switzerland)",
year="2022",
author="Xie, Weiyun and Hattori, Katsumi and Han, Peng and Shi, Haixia",
volume="24",
number="4",
pages="e0494-e0494",
abstract="The Gutenberg-Richter b value describes the ratio between large and small events. A number of studies have suggested that the b value decreases before large earthquakes. In this study, we investigate the temporal variation of the b value of an area along the main rupture zone of the 2008 Wenchuan earthquake (M8.0) prior to the great event. Before estimating b values, we tested the earthquake catalog to make sure that we use the reliable frequency-magnitude distribution by the calculation of MC (completeness of magnitude). We define parameter P (ΔAIC ≧ 2) values to examine the significance level of b-value changes in the temporal variation by combining a boostrap method with Akaike's Information Criterion (AIC). The b value in the main rupture zone shows a long-term decrease trend. We then focus on a smaller area where the initial rupture starts. The results show that b values significantly changed about 3 months before the 2008 Wenchuan earthquake in the initial rupture area, indicating that the b value has a potential capability to monitor and detect precursory phenomena of great earthquakes.<p /> <p>Language: en</p>",
language="en",
issn="1099-4300",
doi="10.3390/e24040494",
url="http://dx.doi.org/10.3390/e24040494"
}