Navas Portella, VíctorSerra, IsabelCorral, ÁlvaroVives i Santa-Eulàlia, Eduard2019-11-142019-11-142018-02-212470-0045https://hdl.handle.net/2445/144812Power-law-type probability density functions spanning several orders of magnitude are found for different avalanche properties. We propose a methodology to overcome empirical constraints that limit the range of truncated power-law distributions. By considering catalogs of events that cover different observation windows, the maximum likelihood estimation of a global power-law exponent is computed. This methodology is applied to amplitude and energy distributions of acoustic emission avalanches in failure-under-compression experiments of a nanoporous silica glass, finding in some cases global exponents in an unprecedented broad range: 4.5 decades for amplitudes and 9.5 decades for energies. In the latter case, however, strict statistical analysis suggests experimental limitations might alter the power-law behavior.12 p.application/pdfeng(c) American Physical Society, 2018Sistemes complexosMaterials porososComplex systemsPorous materialsinfo:eu-repo/semantics/article6857752019-11-14info:eu-repo/semantics/openAccess