Results 31 to 40 of about 304,697 (314)

Ensemble-Based Data Assimilation of Volcanic Ash Clouds from Satellite Observations: Application to the 24 December 2018 Mt. Etna Explosive Eruption

Atmosphere, 2020
Accurate tracking and forecasting of ash dispersal in the atmosphere and quantification of its uncertainty are of fundamental importance for volcanic risk mitigation.
Federica Pardini, S. Corradini, A. Costa, T. Esposti Ongaro, L. Merucci, A. Neri, D. Stelitano, M. de’ Michieli Vitturi   +7 more
semanticscholar   +1 more source

Explosion depths for phreatomagmatic eruptions [PDF]

Geophysical Research Letters, 2014
Subsurface phreatomagmatic explosions can result from the interaction of ascending magma with groundwater. Experiments over a wide range of energies show that for a given energy there is a depth below which an explosion will be contained within the subsurface (not erupt), and there is a corresponding shallower depth that will optimize ejecta dispersal.
Greg A. Valentine, Alison Graettinger, Ingo Sonder   +2 more
openaire   +2 more sources

Highly explosive basaltic eruptions driven by CO2 exsolution

Nature Communications, 2021
Mechanisms that drive highly explosive eruptions of low-viscosity magmas, such as at Sunset Crater volcano, remain uncertain. Here, the authors present evidence for an exsolved CO2 phase ~15 km beneath Sunset Crater that was the critical driver of rapid ...
Chelsea M. Allison, Kurt Roggensack, Amanda B. Clarke   +2 more
doaj   +1 more source

Practising an explosive eruption in Iceland: outcomes from a European exercise

Journal of Applied Volcanology, 2020
A 3 day exercise simulating unrest and a large explosive eruption at Katla volcano, Iceland, was conducted in January 2016. A large volume of simulated data based on a complex, but realistic eruption scenario was compiled in advance and then transmitted ...
C. Witham, S. Barsotti, S. Dumont, B. Oddsson, F. Sigmundsson   +4 more
semanticscholar   +1 more source

Sensitivity of stratospheric ozone to the latitude, season, and halogen content of a contemporary explosive volcanic eruption

Scientific Reports, 2023
We present a systematic evaluation of the perturbation to the stratosphere from an explosive volcanic eruption injecting sulfur dioxide into the atmosphere, as a function of latitude, season, and injection gas halogen content in a chemistry-climate state
Freja F. Østerstrøm, J. Eric Klobas, Robert P. Kennedy, Anita Cadoux, David M. Wilmouth   +4 more
doaj   +1 more source

Discriminating Types of Volcanic Electrical Activity: Toward an Eruption Detection Algorithm

Geophysical Research Letters, 2022
We present a method for classification of the two distinct types of electrical activity that occur during an explosive volcanic eruption: vent discharges and lightning.
S. A. Behnke, H. E. Edens, J. Theiler, D. J. Swanson, S. Senay, A. R. Van Eaton, M. Iguchi, D. Miki   +7 more
doaj   +1 more source

The Research Unit VolImpact: Revisiting the volcanic impact on atmosphere and climate – preparations for the next big volcanic eruption [PDF]

, 2020
This paper provides an overview of the scientific background and the research objectives of the Research Unit “VolImpact” (Revisiting the volcanic impact on atmosphere and climate – preparations for the next big volcanic eruption, FOR 2820).
Buehler, S., Burrows, J., Giorgetta, M., Hegerl, G., Hoose, C., Horvath, A., Hoshyaripour, G., Malinina, E., Quaas, J., Rozanov, A., Schmidt, H., Thomason, L., Timmreck, C., Toohey, M., Vogel, B., von Savigny, C.   +15 more
core   +2 more sources

Responding to eruptive transitions during the 2020–2021 eruption of La Soufrière volcano, St. Vincent

Nature Communications, 2022
The 2020 – 2021 eruption of La Soufrière volcano transitioned from an effusive to explosive eruption style. Here the authors show that input from multiple monitoring datasets and an evolving conceptual model were key to anticipating and responding to the
E. P. Joseph, M. Camejo-Harry, T. Christopher, R. Contreras-Arratia, S. Edwards, O. Graham, M. Johnson, A. Juman, J. L. Latchman, L. Lynch, V. L. Miller, I. Papadopoulos, K. Pascal, R. Robertson, G. A. Ryan, A. Stinton, R. Grandin, I. Hamling, M-J. Jo, J. Barclay, P. Cole, B. V. Davies, R. S. J. Sparks   +22 more
doaj   +1 more source

Pre-eruptive excess volatiles and their relationship to effusive and explosive eruption styles in semi-plugged volcanoes

Frontiers in Earth Science, 2022
Understanding the role of various factors influencing eruption style is challenging, but it can aid in adapting different hazard mitigations and crisis responses for explosive or effusive events.
Sri Budhi Utami, Juan Andùjar, Fidel Costa, Fidel Costa, Fidel Costa, Bruno Scaillet, Hanik Humaida, Simon Carn   +7 more
doaj   +1 more source

Explosive and Eruptive Stars [PDF]

Symposium - International Astronomical Union, 1974
A summary of the main results and problems concerning explosive and eruptive stars is given. The way in which the observations are related to the internal structure problems is briefly explained. Suggestions for further work are made: (1) dynamo theory, supersonic turbulence, stability of the envelope of T Tau stars; (2) rate of exchange of matter in ...
openaire   +2 more sources