2013
DOI: 10.1073/pnas.1312740110
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Abstract: It has been shown that some dynamic features hidden in the time series of complex systems can be uncovered if we analyze them in a time domain called natural time χ . The order parameter of seismicity introduced in this time domain is the variance of χ weighted for normalized energy of each earthquake. Here, we analyze the Japan seismic catalog in natural time from January 1, 1984 to March 11, 2011, the day of the M9 Tohoku earthquake, by considering a sliding natural time window of fixed length comprised of t… Show more

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Cited by 132 publications
(179 citation statements)
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“…Concerning the starting time of the natural time analysis of seismicity, we choose the date of 5 January 2011 which is the date of the appearance of the minimum of the fluctuations of the order parameter of seismicity before this major earthquake reported by Sarlis et al (2013). This, which is remarkably the deepest minimum ever observed during the period 1984-2011 investigated, almost coincides with the initiation of an SES activity-being in accordance with the findings by Varotsos et al (2013)since anomalous magnetic field variations appeared during the period 4-14 January 2011 on the z-component at two measuring sites (Esashi and Mizusawa) lying at epicentral distances of around 130 km (Xu et al 2013;Han et al 2015Han et al , 2016.…”
Section: 1mentioning
confidence: 99%
“…Concerning the starting time of the natural time analysis of seismicity, we choose the date of 5 January 2011 which is the date of the appearance of the minimum of the fluctuations of the order parameter of seismicity before this major earthquake reported by Sarlis et al (2013). This, which is remarkably the deepest minimum ever observed during the period 1984-2011 investigated, almost coincides with the initiation of an SES activity-being in accordance with the findings by Varotsos et al (2013)since anomalous magnetic field variations appeared during the period 4-14 January 2011 on the z-component at two measuring sites (Esashi and Mizusawa) lying at epicentral distances of around 130 km (Xu et al 2013;Han et al 2015Han et al , 2016.…”
Section: 1mentioning
confidence: 99%
“…In both cases, the fluctuations of the order parameter of seismicity exhibited a global minimum before the strongest earthquake occurred during the period investigated. Sarlis et al (2013) also concluded that it appears that there are two kinds of b W minima, namely precursory and non-precursory to large earthquakes. In particular, Sarlis et al (2013) analyzed in natural time the seismicity of Japan from January 1, 1984, to March 11, 2011, using sliding natural time window of lengths W comprising the number of events that would occur in a few months within the area N 46 25 E 148 125 .…”
Section: An Ses Activity Initiates When the Fluctuations Of The Ordermentioning
confidence: 99%
“…2 could not be directly verified due to the lack of geoelectrical data. In view of this lack of data, an investigation was made by Sarlis et al (2013) that was focused on the question whether minima b W,min of the fluctuations b W of the order parameter of seismicity are observed before major earthquakes from January 1, 1984, to March 11, 2011 (the date of the M W 9 Tohoku earthquake occurrence), in Japanese area. Actually such minima were identified to appear a few months before large earthquakes; see Fig.…”
Section: An Ses Activity Initiates When the Fluctuations Of The Ordermentioning
confidence: 99%
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