Yiannis Contoyiannis
University of the West
Particle physicsQuantum chromodynamicsPhysicsStatistical physicsCriticalitySpontaneous symmetry breakingGeologyCritical point (thermodynamics)Phase transitionCritical exponentSeismologyField (physics)Critical phenomenaSymmetry breakingCondensed matter physicsIntermittencyMathematicsFracture (geology)Ising modelRenormalization groupGeophysicsPower law
68Publications
19H-index
706Citations
Publications 67
Newest
10 CitationsSource
#1Georgios BalasisH-Index: 21
#2Ioannis A. Daglis (UoA: National and Kapodistrian University of Athens)H-Index: 37
Last. Charalampos KontoesH-Index: 2
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10 CitationsSource
#1Konstantinos Eftaxias (UoA: National and Kapodistrian University of Athens)H-Index: 29
#2Stelios M. Potirakis (UWest: University of the West)H-Index: 17
Last. Yiannis Contoyiannis (UWest: University of the West)H-Index: 4
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Abstract Based on a multidisciplinary analysis, the following four-stage model of earthquake (EQ) dynamics by means of precursory electromagnetic (EM) emissions (EMEs) has been proposed. The initially observed MHz EM anomaly is due to the fracture of the highly heterogeneous system that surrounds the formation of strong brittle and high-strength entities (asperities) distributed along the rough surfaces of the main fault sustaining the system. The MHz EME can be described by means of a second-or...
13 CitationsSource
Last. Constantinos NomicosH-Index: 21
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In this letter we show, in terms of fracture-induced electromagnetic emissions (EME) that the Earth system around the focal areas came to critical condition a few days before the occurrence of recent significant (M>5) earthquakes (EQs) which happened in the region of the eastern Aegean Sea, between the Greek Islands of Lesvos (6-7, 12 February 2017 and 12 June 2017) and Kos (20 July 2017) and the Turkish Asia Minor coastline. Moreover, departure from the critical state in terms of a tricritical ...
3 Citations
#1Georgios BalasisH-Index: 21
#2Ioannis A. DaglisH-Index: 37
Last. Charalampos KontoesH-Index: 2
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Last. Constantinos NomicosH-Index: 21
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In this short paper we report that the dynamics of the earthquake (EQ) preparation processes, as embedded in the observed fracture-induced electromagnetic emissions (EME), were characterized by critical and then tricritical behavior a few days before the occurrence of the recent Ioannina (Greece) earthquake [(39.79^o N, 20.69^o E, 15 October 2016, M_L=5.3. Specifically, an excerpt of the MHz EME recorded by our remote telemetric station near the city of Ioannina five days before the EQ was...
#1Yiannis Contoyiannis (UoA: National and Kapodistrian University of Athens)H-Index: 19
Last. A. Schekotov (RAS: Russian Academy of Sciences)H-Index: 14
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The ultra-low-frequency (ULF) magnetic variations recorded prior to the 11 March 2011 Tohoku earthquake (EQ) are analyzed using the method of critical fluctuations (MCF). The first application of this specific method to ULF magnetic variations is performed on the unprocessed H- (horizontal) and Z- (vertical) components, as well as on the unprocessed total intensity, F, of the recorded magnetic field. The motivation for the present study was given by recent research results reporting criticality ...
23 CitationsSource
#2Yiannis Contoyiannis (UoA: National and Kapodistrian University of Athens)H-Index: 19
Last. Constantine NomicosH-Index: 1
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In this letter, we show, in terms of the fractureinduced electromagnetic emissions (EME) recorded prior to the earthquake of Chania, Greece [(35.50° N, 23.28° E); October 12, 2013; M w = 6.4] and the seismicity of the area, that there were different evidence indicating the advent of the main shock a few days before its occurrence. Specifically, both the megahertz (MHz) EME and the foreshock seismicity activity came to critical condition a few days before the main shock occurrence. The analysis w...
23 CitationsSource
#1Yiannis Contoyiannis (UoA: National and Kapodistrian University of Athens)H-Index: 19
Last. L. Contoyianni (UoA: National and Kapodistrian University of Athens)H-Index: 2
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Abstract Fracture-induced electromagnetic emissions (EME) have been observed from the laboratory to the geophysical scale permitting the monitoring of damage evolution. It has been shown that the first appearing MHz EME presents second-order phase transition characteristics and has been attributed to the fracture process of the heterogeneous medium surrounding the family of strong entities (asperities) distributed along the fault sustaining the system. The finally, abruptly, emerged strong avala...
21 CitationsSource
Last. Constantinos NomicosH-Index: 21
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In this paper we show, in terms of fracture-induced electromagnetic emissions (EME) recorded two days prior to the earthquake of Kefalonia (Cephalonia), Greece [(38.22o N, 20.53oE), 26 January 2014, M=6.1] that the Earth system around the focal area came to critical condition two days before the earthquake occurence. Specifically, the MHz EME recorded by the remote telemetric stations on the island of Kefalonia and the neighboring island of Zante came simultaneously to critical conditions. The a...