Minima of the fluctuations of the order parameter of global seismicity

Abstract

Minima of the fluctuations of the order parameter of global seismicity. Chaos, volume 25 (Article number 063110) and may be found at http://dx.doi.org/10.1063/1.4922300 . Copyright © and MoralRights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders. Furthermore, the present results strengthen the view that the solid Earth crust behaves as a single complex system. CURVE is the Institutional Repository for Coventry University

On the Statistical Significance of the Variability Minima of the Order Parameter of Seismicity by Means of Event Coincidence Analysis

“…In this section, we present the results of ECA for the interrelation between the strong (target) EQs and the order parameter fluctuation minima β min that have been found in the regional studies of Japan [59], Eastern Mediterranean [62], and in the global seismicity [60,61], see Figure 1. For these reasons, the time-series of target EQs will serve as event time-series A and the time-series of β min as event time-series B, whereas the unit of time for ∆T and τ is one day.…”

“…The time evolution of β W is followed by sliding the window of W consecutive EQs, event by event, through the EQ catalog and assigning to its value the occurrence time of the EQ which follows the last EQ of the window studied in the EQ catalog. The fluctuations of the order parameter of seismicity as quantified by β W have been studied in various seismically active regions, like Japan [30,31,59] or Eastern Mediterranean [62], and in the global seismicity as well [60,61]. These studies have revealed that before strong EQs β W s exhibit characteristic minima labeled β min and were focused, so far, on a small number of the stronger EQs in each geographic region (see Tables 1-5…”

“…The aforementioned regional studies of the variability of the order parameter κ 1 of seismicity have been also generalized to global seismicity by analyzing in natural time the Global Centroid Moment Tensor Catalog [77,78] of the period 1 January 1976 to 1 October 2014 [60,61]. Two different target EQ magnitude thresholds M thres have been used, i.e., M thres = 8.5 and M thres = 8.4, and for the latter threshold the method has been also applied when using the mid-scale time-series of seismicity [79] (cf.…”

“…the latter may be considered as critical phenomena [11,[47][48][49][50][51][52][53][54][55]. The study of the fluctuations of κ 1 before strong EQs revealed the existence of characteristic precursory minima [56,57] that have been determined when studying either the regional or the global seismicity [30,[58][59][60][61][62]. It is the scope of the present work to employ the very recent tool of ECA for the investigation of the statistical significance of such minima.…”

Applied Engineering Using Schumann Resonance for Earthquakes Monitoring

“…In addition, great tsunamis or large earthquakes (M > 8.0) are usually generated whenever extensive areas of the subduction megathrust face a rupture [1]. There are examples of earthquake-produced tsunamis in the 2004 Sumatra earthquake (M-9.0) [2], accounting for 220,000 casualties, or in 2006, with the tsunami that developed from the Java earthquake (M-7.8) [3]. The intensity and destruction capacity of earthquakes and tsunamis are estimated by considering the area of vertical uplift of the sea bed, and these magnitudes are related to the geometry of the slipping fault when the earthquake rupture is located near the sea floor [4].…”