Projects per year
Volcano seismicity is an important tool in monitoring and forecasting activity at volcanoes globally. Volcanic earthquakes show diverse spectral characteristics, of which shallow long-period (low-frequency) seismicity and long-duration tremor are generally interpreted as indicators of fluid migration, and as potential eruption precursors. Here we show that a common low-cohesion volcanic sediment from the Campi Flegrei caldera (Italy) produces low-frequency and long-duration seismicity as it undergoes deformation in dry conditions. We employed acoustic-emission rock-deformation experiments at a range of strain rates to produce events that, when normalized for scale, were spectrally indistinguishable from the long-period and tremor seismicity observed in natural volcanic settings. The generation of these signals was enhanced at lower laboratory strain rates. Correlated X-ray tomography of the samples before and after deformation constrained the source as distributed damage.
FingerprintDive into the research topics of 'Deformation controlled Long-Period seismicity in low-cohesion volcanic sediments'. Together they form a unique fingerprint.
Investigating dynamic fracture processes in 'weak' rocks: applications to volcano seismology and forecasting
Benson, P., Rowley, P. & Bean, C.
1/09/14 → 31/08/19