Explanipedia

Correction to: Cohesional behaviours in pyroclastic material and the implications for deposit architecture Open

Nemi Walding, Rebecca Williams, Pete Rowley, Natasha Dowey · 2025

PDCD-DAT – A global database of pyroclastic density current deposit field data Open

Joshua Travis Brown, Rebecca Williams, S. E. Ogburn, Brittany D. Brand, E. C. P. Breard , et al. · 2025

Pyroclastic density currents represent one of the deadliest hazards posed by active volcanoes. Analysis of their deposits provides valuable insights into their internal dynamics and informs numerical simulations of pyroclastic density curr…

Volcanic eruptions and the global subsea telecommunications network Open

Michael Clare, Isobel Yeo, Jacob Nash, James E. Hunt, Semisi Panuve , et al. · 2025

Behaviours of pyroclastic and analogue materials, in dry and wet environments, for use in experimental modelling of pyroclastic density currents Open

Nemi Walding, Rebecca Williams, Pete Rowley, Natasha Dowey, Daniel R. Parsons , et al. · 2025

Modelling pyroclastic density currents (PDCs) is a challenging yet essential element of hazard assessment. PDCs are unpredictable and internal processes are often difficult to measure directly. Analogue experiments have been an important t…

The influence of moisture on ash strength: implications for understanding volcanic stratigraphy Open

Nemi Walding, Rebecca Williams, Natasha Dowey, Pete Rowley, Mark Thomas , et al. · 2025

Actions to address the recruitment crisis into Geoscience related degrees in the UK Open

Rebecca Williams, Mark Anderson, Sian Davies-Vollum, Roberto Loza Espejel, Stuart Fishwick , et al. · 2024

University Geoscience UK (UGUK) represents geoscience Higher Education providers and is the advocacy group for geoscience at UK Universities. Since 2014, student numbers enrolling on a geoscience-related degrees in the UK have fallen…

Cohesional behaviours in pyroclastic material and the implications for deposit architecture Open

Nemi Walding, Rebecca Williams, Pete Rowley, Natasha Dowey · 2023

Anatomy of a volcanic eruption undersea Open

Rebecca Williams, Pete Rowley · 2023

Submarine flows from the Hunga Tonga–Hunga Ha‘apai eruption decimated seafloor cables

Spontaneous Unsteadiness and Sorting in Pyroclastic Density Currents and their Deposits Open

Pete Rowley, Rebecca Williams, Matthew Johnson, Thomas Johnston, Natasha Dowey , et al. · 2023

Pyroclastic density currents (PDCs) pose substantial risk to populations living on and around active volcanoes, but their structure and internal dynamics are poorly understood. Much of this understanding is derived from interpretation of t…

Spontaneous Unsteadiness and Sorting in Pyroclastic Density Currents and their Deposits - Data Open

Pete Rowley, Rebecca Williams, Matthew Johnson, Thomas Johnston, Natasha Dowey , et al. · 2023

Dataset accompanying Spontaneous Unsteadiness and Sorting in Pyroclastic Density Currents and their Deposits, in Particulate Gravity Currents in the Environment. Raw experiment images and videos for selected runs. Run list include…

Spontaneous Unsteadiness and Sorting in Pyroclastic Density Currents and their Deposits - Data Open

Pete Rowley, Rebecca Williams, Matthew Johnson, Thomas Johnston, Natasha Dowey , et al. · 2023

Dataset accompanying Spontaneous Unsteadiness and Sorting in Pyroclastic Density Currents and their Deposits, in Particulate Gravity Currents in the Environment. Raw experiment images and videos for selected runs. Run list include…

Cohesional behaviours in volcanic material and the implications for deposit architecture. Open

Nemi Walding, Rebecca Williams, Pete Rowley, Natasha Dowey · 2023

Pyroclastic Density Currents (PDCs) are hazardous, multiphase currents of heterogeneous volcanic material and gas. Their high mobility can be partially attributed to fluidisation mechanisms. Moisture (as liquid or gas) can enter a PDC thro…

Characterising the flow-boundary zone in fluidised granular currents Open

Gregory Smith, Rebecca Williams, Pete Rowley, Daniel R. Parsons · 2023

Pyroclastic Density Currents (PDCs) are hazardous flows of hot gas and volcanic particles which have a diverse range of flow behaviours and depositional mechanisms. Here we use defluidising granular currents, analogous to dense PDCs, to ex…

Stationary surface waves and antidunes in dense pyroclastic density currents Open

Pete Rowley, Guido Giordano, Aurora Silleni, G. C. Moore Smith, Matteo Trolese , et al. · 2023

Stationary antidunes are a product of critical flow in open channel systems, but with poor preservation potential. They are related to the existence of stationary surface waves in the overriding current, but their existence in the dense py…

Surface wave observations in 100% Umf fluidised granular current Open

Pete Rowley · 2023

High speed video frames taken at 500 fps, looking down at the upper surface of a granular flow being supplied with 100% of the minimum fluidisation velocity. Shows development and evolution of surface waves as the current propagates and co…

Surface wave observations in 60% Umf fluidised granular current Open

Pete Rowley · 2023

High speed video frames taken at 500 fps, looking down at the upper surface of a granular flow being supplied with 60% of the minimum fluidisation velocity (Umf). Shows development and evolution of surface waves as the current propagates a…

Surface wave observations in 60% Umf fluidised granular current Open

Pete Rowley · 2023

High speed video frames taken at 500 fps, looking down at the upper surface of a granular flow being supplied with 60% of the minimum fluidisation velocity (Umf). Shows development and evolution of surface waves as the current propagates a…

Surface wave observations in 90% Umf fluidised granular current Open

Pete Rowley · 2023

High speed video frames taken at 500 fps, looking down at the upper surface of a granular flow being supplied with 90% of the minimum fluidisation velocity. Shows development and evolution of surface waves as the current propagates and com…

Surface wave observations in 100% Umf fluidised granular current Open

Pete Rowley · 2023

High speed video frames taken at 500 fps, looking down at the upper surface of a granular flow being supplied with 100% of the minimum fluidisation velocity. Shows development and evolution of surface waves as the current propagates and co…

Surface wave observations in 90% Umf fluidised granular current Open

Pete Rowley · 2023

High speed video frames taken at 500 fps, looking down at the upper surface of a granular flow being supplied with 90% of the minimum fluidisation velocity. Shows development and evolution of surface waves as the current propagates and com…

From flume to field: using analogue modelling to delve into uncertainty in our interpretations of volcanic bedforms and what they tell us about deadly hazards Open

Natasha Dowey, Pete Rowley, Rebecca Williams, Nemi Walding, Greg Smith , et al. · 2023

Pyroclastic density currents (PDCs) are density-driven flows of gas, ash and rock generated during explosive volcanic eruptions, or by the collapse of volcanic lava domes. They can reach temperatures of >500 °C and are highly mobile, …

Assessing the magnitude of volcanic risk to global shipping Open

Paul Cragg, Pete Rowley, S. J. Mitchell · 2022

With a global economy dependent on marine traffic there has been little study or recognition of the risk posed to this industry by volcanism. Most major shipping lanes pass close to active volcanoes, or through straits and channels which c…

The muesli effect in pyroclastic density currents - what does reverse grading in an ignimbrite mean?  Open

Matthew Johnson, Natasha Dowey, Rebecca Williams, Pete Rowley · 2021

<p>Pyroclastic density currents (PDCs) are hot, density-driven flows of gas, rock and ash generated during explosive volcanic eruptions, or from the collapse of lava domes (e.g. Fisher, 1979; Branney and Kokelaar, 2002; Cas et al. 20…

Deformation controlled Long-Period seismicity in low cohesion volcanic sediments Open

Pete Rowley, Philip Benson, Christopher J. Bean · 2020

Volcano seismicity is an important tool in remotely monitoring and forecasting activity at volcanoes around the world. Volcanic earthquakes show diverse spectral characteristics, with shallow Long Period (Low Frequency) seismicity and long…

A bedform phase diagram for dense granular currents Open

Gregory Smith, Pete Rowley, Rebecca Williams, Guido Giordano, Matteo Trolese , et al. · 2020

Pyroclastic density currents (PDCs) are a life-threatening volcanic hazard. Our understanding and hazard assessments of these flows rely on interpretations of their deposits. The occurrence of stratified layers, cross-stratification, and b…

Laboratory simulations of fluid-induced seismicity, hydraulic fracture, and fluid flow Open

Philip Benson, David Carlo Austria, Stephan Gehne, Emily Butcher, Claire E. Harnett , et al. · 2019

Reconstructing the Anak Krakatau flank collapse that caused the December 2018 Indonesian tsunami Open

Rebecca Williams, Pete Rowley, Matthew C. Garthwaite · 2019

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 Indones…

Reconstructing the Anak Krakatau flank collapse that caused the December 2018 Indonesian tsunami Open

Rebecca Williams, Pete Rowley, Matthew C. Garthwaite · 2019

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…

Investigation of variable aeration of monodisperse mixtures: implications for pyroclastic density currents Open

Gregory Smith, Rebecca Williams, Pete Rowley, Daniel R. Parsons · 2018

Fracture and damage localization in volcanic edifice rocks from El Hierro, Stromboli and Tenerife Open

Claire E. Harnett, Philip Benson, Pete Rowley, Marco Fazio · 2018

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