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

@article{Christopoulos2020OnTS, title={On the Statistical Significance of the Variability Minima of the Order Parameter of Seismicity by Means of Event Coincidence Analysis}, author={Stavros Christopoulos and Efthimios S. Skordas and Nicholas V. Sarlis}, journal={Applied Sciences}, year={2020}, volume={10}, pages={662} }

Natural time analysis has led to the introduction of an order parameter for seismicity when considering earthquakes as critical phenomena. The study of the fluctuations of this order parameter has shown that its variability exhibits minima before strong earthquakes. In this paper, we evaluate the statistical significance of such minima by using the recent method of event coincidence analysis. Our study includes the variability minima identified before major earthquakes in Japan and Eastern… Expand

#### 7 Citations

Natural Time Analysis: The Area under the Receiver Operating Characteristic Curve of the Order Parameter Fluctuations Minima Preceding Major Earthquakes

- Medicine, Computer Science
- Entropy
- 2020

Fifteen distinct minima—observed simultaneously at two different natural time scales and deeper than a certain threshold—are found on analyzing the seismicity of Japan from 1 January 1984 to 11 March 2011 (the time of the M9 Tohoku EQ occurrence) 1 to 3 months before large EQs. Expand

Long-term magnetic anomalies and its possible relationship to the latest Greater Chilean earthquakes in the context of the seismo-electromagnetic theory

- 2020

Several magnetic measurements and theoretical developments from different research groups have shown certain relationships with worldwide geological processes. Secular variation in geomagnetic cutoff… Expand

Long-term magnetic anomalies and their possible relationship to the latest greater Chilean earthquakes in the context of the seismo-electromagnetic theory

- 2021

Abstract. Several magnetic measurements and theoretical developments from different
research groups have shown certain relationships with worldwide geological
processes. Secular variation in… Expand

Natural Time Analysis of Seismicity within the Mexican Flat Slab before the M7.1 Earthquake on 19 September 2017

- Medicine, Computer Science
- Entropy
- 2020

It is shown that, after the minimum of ΔS, the order parameter of seismicity starts diminishing, thus approaching gradually the critical value 0.070 around the end of August and the beginning of September 2017, which signals that a strong earthquake is anticipated shortly in the flat slab. Expand

Detecting Earthquake-Related Anomalies of a Borehole Strain Network Based on Multi-Channel Singular Spectrum Analysis

- Computer Science, Geology
- Entropy
- 2020

This study has revealed the self-organizing pre-earthquake phenomena and verified the construction of borehole networks is a powerful tool for providing information on earthquake precursors and the dynamics of complex fault systems. Expand

Contemporary Earthquake Hazards in the West-Northwest Himalaya: A Statistical Perspective through Natural Times

- Geology
- 2020

Himalayan earthquakes have deep societal and economic impact. In this article, we implement a surrogate method of nowcasting (Rundle et al., 2016) to determine the current state of seismic hazard… Expand

Evaluation of Pre-Earthquake Anomalies of Borehole Strain Network by Using Receiver Operating Characteristic Curve

- Computer Science
- Remote. Sens.
- 2021

The ROC detection indicates that strain data possibly contain the precursory information associated with major earthquakes and highlights the potential for short-term earthquake forecasting. Expand

#### References

SHOWING 1-10 OF 108 REFERENCES

Minima of the fluctuations of the order parameter of seismicity and earthquake networks based on similar activity patterns

- Geology
- 2019

Abstract Natural time analysis has provided an order parameter for seismicity. It has been shown that the fluctuations of this order parameter exhibit characteristic minima before strong earthquakes… Expand

Order parameter fluctuations of seismicity in natural time before and after mainshocks

- Geology
- 2010

It is widely accepted that the observed earthquake scaling laws indicate the proximity of the system to a critical point. Using the order parameter (OP) for seismicity suggested on the basis of… Expand

Minimum of the order parameter fluctuations of seismicity before major earthquakes in Japan

- Geography, Medicine
- Proceedings of the National Academy of Sciences
- 2013

It is found that the fluctuations of the order parameter of seismicity exhibit distinct minima a few months before all of the shallow earthquakes of magnitude 7.6 or larger that occurred during this 27-y period in the Japanese area. Expand

Natural time analysis: Important changes of the order parameter of seismicity preceding the 2011 M9 Tohoku earthquake in Japan

- Geology
- 2019

Applying the natural time analysis to the Japanese seismic data, we find that almost three months before the 11 March 2011 M9 Tohoku earthquake the order parameter fluctuations of seismicity… Expand

Scale-specific order parameter fluctuations of seismicity before mainshocks: Natural time and Detrended Fluctuation Analysis

- Geology
- 2012

The order parameter fluctuations of seismicity are investigated upon considering a natural time window of fixed length sliding through the consecutive earthquakes that occurred in California. We… Expand

An Application of the Coherent Noise Model for the Prediction of Aftershock Magnitude Time Series

- Geology, Computer Science
- Complex.
- 2017

This algorithm is based on the concept of natural time and exploits the complexity exhibited by the coherent noise model and exhibits the ubiquitous 1/f noise behavior for the aftershocks of strong earthquakes of magnitude Mź6. Expand

Statistical Significance of Minimum of the Order Parameter Fluctuations of Seismicity Before Major Earthquakes in Japan

- Geology
- Pure and Applied Geophysics
- 2014

In a previous publication, the seismicity of Japan from 1 January 1984 to 11 March 2011 (the time of the $$M9$$M9 Tohoku earthquake occurrence) has been analyzed in a time domain called natural time… Expand

Study of the temporal correlations in the magnitude time series before major earthquakes in Japan

- Geology
- 2014

A characteristic change of seismicity has been recently uncovered when the precursory Seismic Electric Signals activities initiate before an earthquake occurrence. In particular, the fluctuations of… Expand

A plausible universal behaviour of earthquakes in the natural time-domain

- Geography
- Proceedings of the Japan Academy. Series B, Physical and Biological Sciences
- 2004

In previous papers, we showed that in the new time-domain, called natural time: 1) the power spectrum of an SES-activity exhibits properties of critical phenomena and the power spectra of the local… Expand

Non-extensive and natural time analysis of seismicity before the Mw6.4, October 12, 2013 earthquake in the South West segment of the Hellenic Arc

- 2014

Earthquakes exhibit complex correlations in space, time, and magnitude. As such, they present a unique example for a time series exhibiting complexity. To uncover hidden dynamic features of… Expand