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Velocity profiles in sedimenting pyroclastic density currents (2020)
Presentation / Conference
Rowley, P., Smith, G., Williams, R., & Parsons, D. (2020, January). Velocity profiles in sedimenting pyroclastic density currents. Paper presented at Volcanic and Magmatic Studies Group, Plymouth, UK

Pyroclastic density currents pose a threat to life at active volcanoes around the world, and mitigation of their impacts requires a better understanding of their complex flow behaviours. Understanding the internal dynamics of these flows, and how the... Read More about Velocity profiles in sedimenting pyroclastic density currents.

Generating long period and tremor-like seismicity without fluids in volcanic materials (2020)
Presentation / Conference
Rowley, P., Benson, P., & Bean, C. (2020, January). Generating long period and tremor-like seismicity without fluids in volcanic materials. Poster presented at Volcanic and Magmatic Studies Group, Plymouth, UK

Volcano seismicity is routinely used in the remote monitoring and forecasting of activity at volcanoes around the world. The nature of this seismicity varies, but long period (LP) seismicity is generally interpreted as an indicator of fluid migration... Read More about Generating long period and tremor-like seismicity without fluids in volcanic materials.

Laboratory simulations of fluid-induced seismicity, hydraulic fracture, and fluid flow (2019)
Journal Article
Benson, P. M., Austria, D. C., Gehne, S., Butcher, E., Harnett, C. E., Fazio, M., …Tomas, R. (in press). Laboratory simulations of fluid-induced seismicity, hydraulic fracture, and fluid flow. Geomechanics for Energy and the Environment, 100169. https://doi.org/10.1016/j.gete.2019.100169

Fluid-induced seismicity has been observed and recorded for decades. Seismic energy necessarily requires a source, which is frequently related to rock fracture either in compression or tension. In both cases, such fracture may be promoted by crustal... Read More about Laboratory simulations of fluid-induced seismicity, hydraulic fracture, and fluid flow.

Reconstructing the Anak Krakatau flank collapse that caused the December 2018 Indonesian tsunami (2019)
Journal Article
Rowley, P., Williams, R., & Garthwaite, M. C. (2019). Reconstructing the Anak Krakatau flank collapse that caused the December 2018 Indonesian tsunami. Geology, 47(10), 973-976. https://doi.org/10.1130/G46517.1

Volcanogenic tsunamis are one of the deadliest volcanic phenomena. Understanding their triggering processes, and mitigating their effect, remains a major challenge. On 22 December 2018, flank failure of the Anak Krakatau volcano in Indonesia generate... Read More about Reconstructing the Anak Krakatau flank collapse that caused the December 2018 Indonesian tsunami.

Inferring pyroclastic density current flow conditions using syn-depositional sedimentary structures (2019)
Journal Article
Pollock, N. M., Brand, B. D., Rowley, P. J., Sarocchi, D., & Sulpizio, R. (2019). Inferring pyroclastic density current flow conditions using syn-depositional sedimentary structures. Bulletin of Volcanology, 81(8), https://doi.org/10.1007/s00445-019-1303-z

The processes occurring in the basal region of concentrated pyroclastic density currents (PDCs) influence the mobility, runout distance, and damage potential of a current, but directly observing these processes is extremely difficult. Instead, we mus... Read More about Inferring pyroclastic density current flow conditions using syn-depositional sedimentary structures.

Investigation of variable aeration of monodisperse mixtures: implications for pyroclastic density currents (2018)
Journal Article
Smith, G. M., Williams, R., Rowley, P. J., & Parsons, D. R. (2018). Investigation of variable aeration of monodisperse mixtures: implications for pyroclastic density currents. Bulletin of Volcanology, 80(8), https://doi.org/10.1007/s00445-018-1241-1

© 2018, The Author(s). The high mobility of dense pyroclastic density currents (PDCs) is commonly attributed to high gas pore pressures. However, the influence of spatial and temporal variations in pore pressure within PDCs has yet to be investigate... Read More about Investigation of variable aeration of monodisperse mixtures: implications for pyroclastic density currents.

Fracture and damage localization in volcanic edifice rocks from El Hierro, Stromboli and Tenerife (2018)
Journal Article
Harnett, C. E., Benson, P. M., Rowley, P., & Fazio, M. (2018). Fracture and damage localization in volcanic edifice rocks from El Hierro, Stromboli and Tenerife. Scientific Reports, 8(1), https://doi.org/10.1038/s41598-018-20442-w

© 2018 The Author(s). We present elastic wave velocity and strength data from a suite of three volcanic rocks taken from the volcanic edifices of El Hierro and Tenerife (Canary Islands, Spain), and Stromboli (Aeolian Islands, Italy). These rocks span... Read More about Fracture and damage localization in volcanic edifice rocks from El Hierro, Stromboli and Tenerife.

Morphological and Mechanical Biomimetic Bone Structures (2017)
Journal Article
Parwani, R., Curto, M., Kao, A. P., Rowley, P. J., Pani, M., Tozzi, G., & Barber, A. H. (2017). Morphological and Mechanical Biomimetic Bone Structures. ACS Biomaterials Science and Engineering, 3(11), 2761-2767. https://doi.org/10.1021/acsbiomaterials.6b00652

© 2016 American Chemical Society. Cortical bone is an example of a mineralized tissue containing a compositional distribution of hard and soft phases in 3-dimensional space for mechanical function. X-ray computed tomography (XCT) is able to describe... Read More about Morphological and Mechanical Biomimetic Bone Structures.

Key future directions for research on turbidity currents and their deposits (2015)
Journal Article
Piper, D. J., Cartigny, M. J., Arnott, R. W., Talling, P. J., Allin, J., Armitage, D. A., …Xu, J. (2015). Key future directions for research on turbidity currents and their deposits. Journal of Sedimentary Research, 85(2), 153-169. https://doi.org/10.2110/jsr.2015.03

© E 2015, SEPM (Society for Sedimentary Geology). Turbidity currents, and other types of submarine sediment density flow, redistribute more sediment across the surface of the Earth than any other sediment flow process, yet their sediment concentratio... Read More about Key future directions for research on turbidity currents and their deposits.

Experimental study of dense pyroclastic density currents using sustained, gas-fluidized granular flows (2014)
Journal Article
Rowley, P. J., Roche, O., Druitt, T. H., & Cas, R. (2014). Experimental study of dense pyroclastic density currents using sustained, gas-fluidized granular flows. Bulletin of Volcanology, 76(9), 1-13. https://doi.org/10.1007/s00445-014-0855-1

© 2014, Springer-Verlag Berlin Heidelberg. We present the results of laboratory experiments on the behaviour of sustained, dense granular flows in a horizontal flume, in which high-gas pore pressure was maintained throughout the flow duration by cont... Read More about Experimental study of dense pyroclastic density currents using sustained, gas-fluidized granular flows.

Shear-derived mixing in dense granular flows (2011)
Journal Article
Rowley, P. J., Kokelaar, P., Menzies, M., & Waltham, D. (2011). Shear-derived mixing in dense granular flows. Journal of Sedimentary Research, 81(12), 874-884. https://doi.org/10.2110/jsr.2011.72

In flume experiments, granular avalanches run onto loose substrates develop 3-D architectures that record shear-derived mixing between the flow and the substrate. Spherical silica beads 0.250 mm diameter are run onto stratified substrates of various... Read More about Shear-derived mixing in dense granular flows.