%P 5172-5178 %D 2013 %A F Vallianatos %A G Michas %A P Benson %A P Sammonds %V 392 %T Natural time analysis of critical phenomena: The case of acoustic emissions in triaxially deformed Etna basalt %N 20 %X Acoustic emissions exhibit complex correlations between space, time, and magnitude. As such, they present a unique example for a complex time series. We apply the recently introduced method of natural time analysis, which enables the detection of long-range temporal correlations even in the presence of heavy tails and find that the acoustic emissions exhibits features similar to that of other equilibrium or non-equilibrium critical systems such as worldwide seismicity as presented in the Centennial earthquake catalogue which includes global seismicity events with magnitude . These results support the universal behaviour of the fracturing processes from the laboratory to the global scale. %O This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. %I ELSEVIER %L discovery10117709 %J Physica A: Statistical Mechanics and its Applications %K Natural time analysis, Acoustic emissions, SeismicityFracture