Matches in SemOpenAlex for { <https://semopenalex.org/work/W2034308164> ?p ?o ?g. }
- W2034308164 endingPage "351" @default.
- W2034308164 startingPage "339" @default.
- W2034308164 abstract "The generation of transient electric potential prior to rupture has been demonstrated in a number of laboratory experiments involving both dry and wet rock specimens. Several different electrification effects are responsible for these observations, however, piezoelectricity cannot explain why quartz-free rocks can also generate precursory phenomena and electrokinetic phenomena are normally very weak to produce macro- and megascopic scale effects. Electrification is observed in dry, non-piezoelectric rocks meaning that additional, solid state mechanisms should be responsible. Herein we focus on a promising effect that is ubiquitous during brittle rock failure: the motion of charged edge dislocations (MCD) during crack opening and propagation (microfracturing). We report a series of laboratory experiments on dry marble samples and discuss their possible relationship to field observations of purported electric earthquake precursors (EEP). The experiments confirm the generation of pressure-stimulated currents (PSC) as expected by the MCD model. The PSC was linearly related to the stress rate, so long as the stressed material deformed elastically. Deviation from linearity arose when the applied stress drove the specimen into the plastic deformation range; this effect has been attributed to the dependence of the PSC on the stress rate and, ultimately, to the inverse of the changing (decreasing) Young's modulus. The emitted current appears very intense and non-linear just prior to failure, where massive crack propagation implies massive MCD processes. Repeated cycles of deformation are associated with progressively weaker current emission, indicating the strong dependence of electrification on the residual damage. Overall, the results are consistent with, and render support to the concept of electrification by MCD/microfracturing. Other mechanisms cannot be excluded of course but are rather considered to accompany and supplement the drastic MCD process. The experiments cannot determine whether these process can scale up to earthquake-size volumes but they certainly do not contest the possibility. If so, the origin of the EEP would be massive crack formation and propagation, which in the case of earthquakes is expected to be a short-lived process at the terminal phase of the cycle. Observable macroscopic ULF field would be generated by the superposition of fields generated by multiple simultaneous individual cracks and would evolve in correspondence with the crack propagation process. It is possible to model the evolution of large crack ensembles and assess the expected time functions of transient EEP events: the result is a family of asymmetric-bell shaped time functions that may appear isolated or in groups. The model has been successfully applied to the analysis of real field observations." @default.
- W2034308164 created "2016-06-24" @default.
- W2034308164 creator A5014578091 @default.
- W2034308164 creator A5016282675 @default.
- W2034308164 creator A5058121316 @default.
- W2034308164 creator A5059155886 @default.
- W2034308164 creator A5069456466 @default.
- W2034308164 date "2004-01-01" @default.
- W2034308164 modified "2023-10-16" @default.
- W2034308164 title "Electric earthquake precursors: from laboratory results to field observations" @default.
- W2034308164 cites W1551376480 @default.
- W2034308164 cites W1965164129 @default.
- W2034308164 cites W1971077216 @default.
- W2034308164 cites W1972994936 @default.
- W2034308164 cites W1981447572 @default.
- W2034308164 cites W1982286443 @default.
- W2034308164 cites W1987812110 @default.
- W2034308164 cites W1988067300 @default.
- W2034308164 cites W1990956329 @default.
- W2034308164 cites W1998906651 @default.
- W2034308164 cites W2004317278 @default.
- W2034308164 cites W2004448975 @default.
- W2034308164 cites W2007713000 @default.
- W2034308164 cites W2016146805 @default.
- W2034308164 cites W2016340873 @default.
- W2034308164 cites W2016657275 @default.
- W2034308164 cites W2019909031 @default.
- W2034308164 cites W2021993244 @default.
- W2034308164 cites W2029719994 @default.
- W2034308164 cites W2034071496 @default.
- W2034308164 cites W2036668541 @default.
- W2034308164 cites W2037560779 @default.
- W2034308164 cites W2050334287 @default.
- W2034308164 cites W2050589753 @default.
- W2034308164 cites W2065182585 @default.
- W2034308164 cites W2072781278 @default.
- W2034308164 cites W2078173201 @default.
- W2034308164 cites W2080601561 @default.
- W2034308164 cites W2082147615 @default.
- W2034308164 cites W2082694022 @default.
- W2034308164 cites W2083936396 @default.
- W2034308164 cites W2084797538 @default.
- W2034308164 cites W2092726101 @default.
- W2034308164 cites W2096223865 @default.
- W2034308164 cites W2102700228 @default.
- W2034308164 cites W2102755567 @default.
- W2034308164 cites W2104210632 @default.
- W2034308164 cites W2131318055 @default.
- W2034308164 cites W2134837322 @default.
- W2034308164 cites W2151990580 @default.
- W2034308164 cites W2157229358 @default.
- W2034308164 cites W2161520254 @default.
- W2034308164 cites W2167720284 @default.
- W2034308164 cites W4229562225 @default.
- W2034308164 cites W4246595586 @default.
- W2034308164 doi "https://doi.org/10.1016/j.pce.2003.12.003" @default.
- W2034308164 hasPublicationYear "2004" @default.
- W2034308164 type Work @default.
- W2034308164 sameAs 2034308164 @default.
- W2034308164 citedByCount "94" @default.
- W2034308164 countsByYear W20343081642012 @default.
- W2034308164 countsByYear W20343081642013 @default.
- W2034308164 countsByYear W20343081642014 @default.
- W2034308164 countsByYear W20343081642015 @default.
- W2034308164 countsByYear W20343081642016 @default.
- W2034308164 countsByYear W20343081642017 @default.
- W2034308164 countsByYear W20343081642018 @default.
- W2034308164 countsByYear W20343081642019 @default.
- W2034308164 countsByYear W20343081642020 @default.
- W2034308164 countsByYear W20343081642021 @default.
- W2034308164 countsByYear W20343081642022 @default.
- W2034308164 countsByYear W20343081642023 @default.
- W2034308164 crossrefType "journal-article" @default.
- W2034308164 hasAuthorship W2034308164A5014578091 @default.
- W2034308164 hasAuthorship W2034308164A5016282675 @default.
- W2034308164 hasAuthorship W2034308164A5058121316 @default.
- W2034308164 hasAuthorship W2034308164A5059155886 @default.
- W2034308164 hasAuthorship W2034308164A5069456466 @default.
- W2034308164 hasConcept C100082104 @default.
- W2034308164 hasConcept C121332964 @default.
- W2034308164 hasConcept C127313418 @default.
- W2034308164 hasConcept C136478896 @default.
- W2034308164 hasConcept C138885662 @default.
- W2034308164 hasConcept C159985019 @default.
- W2034308164 hasConcept C192562407 @default.
- W2034308164 hasConcept C199289684 @default.
- W2034308164 hasConcept C204366326 @default.
- W2034308164 hasConcept C21036866 @default.
- W2034308164 hasConcept C41895202 @default.
- W2034308164 hasConcept C57879066 @default.
- W2034308164 hasConcept C60799052 @default.
- W2034308164 hasConcept C62520636 @default.
- W2034308164 hasConceptScore W2034308164C100082104 @default.
- W2034308164 hasConceptScore W2034308164C121332964 @default.
- W2034308164 hasConceptScore W2034308164C127313418 @default.
- W2034308164 hasConceptScore W2034308164C136478896 @default.
- W2034308164 hasConceptScore W2034308164C138885662 @default.
- W2034308164 hasConceptScore W2034308164C159985019 @default.