Microscopic Evolution of Laboratory Volcanic Hybrid Earthquakes.

ABSTRACT: Characterizing the interaction between fluids and microscopic defects is one of the long-standing challenges in understanding a broad range of cracking processes, in part because they are so difficult to study experimentally. We address this issue by reexamining records of emitted acoustic phonon events during rock mechanics experiments under wet and dry conditions. The frequency spectrum of these events provides direct information regarding the state of the system. Such events are typically subdivided into high frequency (HF) and low frequency (LF) events, whereas intermediate "Hybrid" events, have HF onsets followed by LF ringing. At a larger scale in volcanic terranes, hybrid events are used empirically to predict eruptions, but their ambiguous physical origin limits their diagnostic us

SUBMITTER: Ghaffari HO 

PROVIDER: S-EPMC5225436 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature