Searching for patterns in caldera unrest

2017 ◽  
Vol 18 (7) ◽  
pp. 2748-2768 ◽  
Author(s):  
Laura Sandri ◽  
Valerio Acocella ◽  
Chris Newhall
Keyword(s):  
Caldera Unrest

scholarly journals The Campi Flegrei caldera unrest: Discriminating magma intrusions from hydrothermal effects and implications for possible evolution

2019 ◽  
Vol 188 ◽  
pp. 108-122 ◽  
Author(s):  
Claudia Troise ◽  
Giuseppe De Natale ◽  
Roberto Schiavone ◽  
Renato Somma ◽  
Roberto Moretti
Keyword(s):  
Campi Flegrei ◽  
Campi Flegrei Caldera ◽  
Caldera Unrest

scholarly journals Geophysical and hydrogeological experiments from a shallow hydrothermal system at Solfatara Volcano, Campi Flegrei, Italy: Response to caldera unrest

2007 ◽  
Vol 112 (B6) ◽  
Author(s):  
Pier Paolo G. Bruno ◽  
Giovanni P. Ricciardi ◽  
Zaccaria Petrillo ◽  
Vincenzo Di Fiore ◽  
Antonio Troiano ◽  
...  
Keyword(s):  
Hydrothermal System ◽  
Campi Flegrei ◽  
Caldera Unrest

Dynamical evolution of the seismic coda wave increments during the 2011-2012 Santorini's caldera unrest. A Non-Extensive Statistical Physics approach.

2020 ◽  
Author(s):  
Theodoros Aspiotis ◽  
Ioannis Koutalonis ◽  
Georgios Michas ◽  
Filippos Valianatos
Keyword(s):  
Statistical Physics ◽  
Distribution Functions ◽  
Coda Waves ◽  
Coda Wave ◽  
Tectonic Activity ◽  
Volcanic Complex ◽  
Dynamical Structure ◽  
Gaussian Shape ◽  
Caldera Unrest ◽  
Seismic Coda

<p>Santorini's caldera being unrest during 2011-2012, led several studies to raise the important question of whether seismicity is associated with an impending and potential volcanic eruption or it solely relieves the accumulated tectonic energy. In the present work we study seismic coda waves generated by local earthquake events prior, during and after the seismic crisis that occurred within the caldera area. Coda waves are interpreted as scattered seismic waves generated by heterogeneities within the Earth, i.e. by faults, fractures, velocity and/or density boundaries and anomalies, etc. In particular, we utilize the three components of the seismograms recorded by three seismological stations on the island of Santorini and estimate the duration of the coda waves by implementing a three step procedure that includes the signal-to-noise ratio, the STA/LTA method and the short time Fourier transform. The final estimation was verified or reestimated manually due to the existent ambient seismic noise. Due to the nature and the path complexity of the coda waves and towards achieving a unified framework for the study of the immerse geo-structural seismotectonic complexity of the Santorini volcanic complex, we use Non-Extensive Statistical Physics (NESP) to study the probability distribution functions (pdfs) of the increments of seismic coda waves. NESP forms a generalization of the Boltzmann-Gibbs statistical mechanics, that has been extensively used for the analysis of semi-chaotic systems that exhibit long-range interactions, memory effects and multi-fractality. The analysis and results demonstrate that the seismic coda waves increments deviate from the Gaussian shape and their respective pdfs could adequately be described and processed by the q-Gaussian distribution. Furthermore and in order to investigate the dynamical structure of the volcanic-tectonic activity, we estimate the q-indices derived from the pdfs of the coda wave time series increments during the period 2009 - 2014 and present their variations as a function of time and as a function of the local magnitude (M<sub>L</sub>) of the events prior, during and after the caldera unrest.</p> <p> </p> <p><strong> Acknowledgments. </strong>We acknowledge support by the project “HELPOS – Hellenic System for Lithosphere Monitoring” (MIS 5002697) which is implemented under the Action “Reinforcement of the Research and Innovation Infrastructure”, funded by the Operational Programme "Competitiveness, Entrepreneurship and Innovation" (NSRF 2014-2020) and co-financed by Greece & European Union (ERDF)</p>

The use of IFSAR and classical geodetic techniques for caldera unrest episodes: application to the Campi Flegrei uplift event of 2000

2004 ◽  
Vol 133 (1-4) ◽  
pp. 247-260 ◽  
Author(s):  
R. Lanari ◽  
P. Berardino ◽  
S. Borgström ◽  
C. Del Gaudio ◽  
P. De Martino ◽  
...  
Keyword(s):  
Campi Flegrei ◽  
Caldera Unrest

scholarly journals Hazard assessment during caldera unrest at the Campi Flegrei, Italy: a contribution from gravity–height gradients

2003 ◽  
Vol 211 (3-4) ◽  
pp. 295-309 ◽  
Author(s):  
Joachim Gottsmann ◽  
Giovanna Berrino ◽  
Hazel Rymer ◽  
Glyn Williams-Jones
Keyword(s):  
Hazard Assessment ◽  
Campi Flegrei ◽  
Caldera Unrest

scholarly journals Insight Into Campi Flegrei Caldera Unrest Through Seismic Tremor Measurements at Pisciarelli Fumarolic Field

2019 ◽  
Vol 20 (11) ◽  
pp. 5544-5555 ◽  
Author(s):  
F. Giudicepietro ◽  
G. Chiodini ◽  
S. Caliro ◽  
W. De Cesare ◽  
A. M. Esposito ◽  
...  
Keyword(s):  
Campi Flegrei ◽  
Campi Flegrei Caldera ◽  
Caldera Unrest ◽  
Insight Into

Caldera Unrest

Science ◽  
1989 ◽  
Vol 245 (4923) ◽  
pp. 1167-1167
Author(s):  
C. G. NEWHALL ◽  
D. DZURISIN
Keyword(s):  
Caldera Unrest
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