Results 91 to 100 of about 18,565 (272)

Seismic Data, Photographic Images and Physical Modeling of Volcanic Plumes as a Tool for Monitoring the Activity of Nevado del Ruiz Volcano, Colombia

Frontiers in Earth Science, 2018
Quantification of volcanic plume parameters is a fundamental task to characterize the behavior of an active volcano. The volcanic plume mass, flow rate and ash injection were determined from seismic data, in addition to photographic images and ...
John Makario Londono, John Makario Londono, Beatriz Galvis, Beatriz Galvis   +3 more
doaj   +1 more source

Uses of volcanic ash beds in geomorphology

, 1967
In geomorphology air-fall volcanic ashes possess high value as marker beds. These have proved particularly useful in studies associated with infilling of flood plains, fan building, terrace correlation and chronology, erosion, shoreline and sea level ...
Pullar, W.A.
core  

Ages of the Pliocene-Pleistocene Alexandra and Ngatutura Volcanics, western North Island, New Zealand, and some geological implications

, 1989
The Alexandra and Ngatutura Volcanics are the two southernmost of the Pliocene-Quaternary volcanic fields of western and northern North Island, New Zealand, northwest of Taupo Volcanic Zone TVZ.
Itaya, T., Lowe, David J., Briggs, Roger M., Keane, A.J.   +3 more
core   +1 more source

Geochemical investigation of impactites from the Boltysh impact structure and possible relationship to early Danian sediments from the Umbria–Marche Basin, Italy

Meteoritics &Planetary Science, EarlyView.
Abstract Within the Danian Scaglia Rossa Formation appears a regionally correlatable horizon cutting across multiple sections and outcrops within the Umbria–Marche Basin of NE Italy, where it is intercalated with uniform pelagic carbonate successions. This horizon is called “ALE layer” and has tentatively been interpreted as a fine‐grained volcanic ash.
Toni Schulz, Sophia Wernitznig, Christian Koeberl, Bérengère Mougel, Alessandro Montanari, Frédéric Moynier   +5 more
wiley   +1 more source

Improving volcanic ash fragility functions through laboratory studies: example of surface transportation networks

Journal of Applied Volcanology, 2017
Surface transportation networks are critical infrastructure that are frequently affected by volcanic ash fall. Disruption to surface transportation from volcanic ash is often complex with the severity of impacts influenced by a vast array of parameters ...
Daniel Mark Blake, Natalia Irma Deligne, Thomas McDonald Wilson, Grant Wilson   +3 more
doaj   +1 more source

A novel method based on high‐resolution imaging spectroscopy to predict fine‐root traits and the economics space of fresh tree roots

New Phytologist, EarlyView.
Maps of the estimated root nitrogen concentration in the < 0.5‐mm‐diameter classes of 20 woody species based on the imaging spectroscopy using the shortwave infrared spectral region. Summary Tree fine‐root morphological, anatomical, and chemical traits are important to reflect belowground resource acquisition strategies to support tree growth, but ...
Naoki Makita, Natsuko Tanikawa, Tatsuro Nakaji   +2 more
wiley   +1 more source

Enhancing volcanic eruption simulations with the WRF-Chem v4.8 [PDF]

Geoscientific Model Development
Volcanic eruptions are one of the major natural hazards, exerting profound effects on the environment and climate. The emissions associated with such eruptions pose substantial risks to terrestrial systems and public health, particularly through the ...
A. Ukhov, G. Stenchikov, J. Schnell, J. Schnell, R. Ahmadov, U. Rizza, G. Grell, I. Hoteit   +7 more
doaj   +1 more source

Syndromic surveillance to assess the potential public health impact of the Icelandic volcanic ash plume across the United Kingdom, April 2010

, 2010
The Eyjafjallajökull volcano in Iceland erupted on 14 April 2010 emitting a volcanic ash plume that spread across the United Kingdom and mainland Europe.
Kavanagh, K, Catchpole, M, Harcourt, S., McMenamin, J., Harcourt, S, Ramsay, CN, Elliott, A.J., McMenamin, J, Smith, GE, Robertson, C, Loveridge, P., Robertson, C., Loveridge, P, McCloskey, B, Smith, S, Pnaiser, R, Pnaiser, R., Kibble, Andrew, Ramsay, C.N., Murray, V., Smith, G.E., Singh, N, Kibble, A., Kavanagh, K., Singh, N., McCloskey, B., Smith, S., Ibbotson, S., Ibbotson, S, Catchpole, M., Elliot, AJ, Murray, V   +31 more
core  

Microstructural damage of thermal barrier coatings due to CMAS [PDF]

, 2013
Over recent years, due to a constant desire for higher efficiency engines and hence increased turbine entry temperatures and a proportional reduction in [Carbon dioxide] emissions, there is a need to understand how molten slags (CMAS: Calcia magnesia ...
Ndamka, Ngunjoh Lawrence
core  

Reference data set of volcanic ash physicochemical and optical properties

, 2017
Uncertainty in the physicochemical and optical properties of volcanic ash particles creates errors in the detection and modeling of volcanic ash clouds and in quantification of their potential impacts.
Bonadonna, C., M. F. Sunding, Sunding, Martin Fleissner, Durant, A. J., A. Stohl, A. Vogel, Stohl, A., A. J. Durant, Sunding, M. F., Sytchkova, A., Bonadonna, Costanza, K. Krüger, Sytchkova, Anna Krasilnikova, A. S. Azar, A. Sytchkova, Diplas, Spyridon, Diplas, S., Krüger, K., Durant, Adam, Azar, A. S., S. Diplas, Azar, Amin Shahrestani, Stohl, Andreas, Rose, William I., Rose, W. I., Krüger, Kirstin, C. Bonadonna, Vogel, A., W. I. Rose, Vogel, Andreas   +29 more
core   +1 more source