A5084850217- Combustion and Detonation Processes
- Gas Dynamics and Kinetic Theory
- Computational Fluid Dynamics and Aerodynamics
- Laser-Plasma Interactions and Diagnostics
- Plasma and Flow Control in Aerodynamics
- Geological and Geophysical Studies
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Pacific and Southeast Asian Studies
- Water-Energy-Food Nexus Studies
- Lightning and Electromagnetic Phenomena
- Space Exploration and Technology
- Astro and Planetary Science
- Photovoltaic Systems and Sustainability
- Maritime and Coastal Archaeology
- Fire dynamics and safety research
- earthquake and tectonic studies
- Power Systems and Renewable Energy
- Methane Hydrates and Related Phenomena
- Island Studies and Pacific Affairs
- Planetary Science and Exploration
- Landslides and related hazards
- Seismology and Earthquake Studies
University of Auckland
2022-2023
Ludwig-Maximilians-Universität München
2018-2021
Abstract Volcanic lightning—a near ubiquitous feature of explosive volcanic eruptions—possesses great potential for the analysis plume dynamics. To date, lack quantitative knowledge on relationships between characteristics hinders efficient data and application resulting parameterizations. We use a shock‐tube apparatus rapid decompression experiments to produce particle‐laden jets. have systematically independently varied water content (0–27 wt%) temperature (25–320 °C) particle‐gas mixture....
Abstract Volcanic jet flows in explosive eruptions emit radio frequency signatures, indicative of their fluid dynamic and electrostatic conditions. The emissions originate from sparks supported by an electric field built up the ejected charged volcanic particles. When shock-defined, low-pressure regions confine sparks, signatures may be limited to high-frequency content corresponding early components avalanche-streamer-leader hierarchy. Here, we image a standing shock together transient...
Abstract The mid-fifteenth century eruption of the Kuwae volcano (Vanuatu), known locally as Tombuk eruption, is widely but not universally considered responsible for one three largest atmospheric sulphate events past millennium. Questions remain about its precise magnitude and global signature. This controversy reflects a lack modern description characterisation at source. Through comprehensive survey published unpublished literature, we review available historical, archaeological...
Accurate predictions of volcanological phenomena, such as the trajectory blocks accelerated by volcanic explosions, require quantitative skills training. Large outdoor experiments can be useful to convey concepts processes students in an exciting way. Beyond fun aspects, these provide opportunity engage with physics projectile flight and help promote mathematical learning within Earth Sciences. We present a framework required interpret ballistic trajectories experiment known commonly...
Submarine eruptions dominate volcanism on Earth, but the recent eruption of Hunga Tonga–Hunga Haʻapai volcano in January 2022 was one most explosive ever recorded. Many large calderas collapse during and resulting morphology provides unvaluable information for understanding processes highly unpredictable eruptions.Here we present a detailed analyses post-eruption caldera submarine volcano. We use first multibeam bathymetry caldera, acquired only 5 months after MV Pacific...
<p>In December 2014, eruptions began from a submarine vent between the islands of Hunga Tonga and Ha’apai, 65 km north Tongatapu, Tonga. The “Hungas” represent small NW NE remnants flanks larger edifice, with ~5 km-diameter collapse caldera south them. 2014/15 Surtseyan explosive lasted for 5 weeks, building 140 m-high tuff ring.</p><p>Deposits on Ha’apai tephra fall Tongatapu record two very...
In the AD 1450s, one of three largest climate-forcing eruptions 1000 years took place, with similar impacts as 1815 event Tambora, Indonesia, that caused ‘year without a summer’ 1816. The submarine caldera Kuwae, Vanuatu, has long been suggested to be source 1450s eruption, but this is still highly debated.Today, 12-by-6 km large Kuwae lies between islands Epi and Tongoa. Here, an eruption occurred in 15th century locally devastation, covering surrounding it vast amounts...