Results 31 to 40 of about 1,217 (152)

Tephrochronology and Provenance of an Early Pleistocene (Calabrian) Tephra From IODP Expedition 374 Site U1524, Ross Sea (Antarctica)

Geochemistry, Geophysics, Geosystems, 2021
We present a full characterization of a 20 cm‐thick tephra layer found intercalated in the marine sediments recovered at Site U1524 during International Ocean Discovery Program (IODP) Expedition 374, in the Ross Sea, Antarctica.
A. Di Roberto, B. Scateni, G. Di Vincenzo, M. Petrelli, G. Fisauli, S. J. Barker, P. Del Carlo, F. Colleoni, D. K. Kulhanek, R. McKay, L. De Santis, The IODP Expedition 374 Scientific Party   +11 more
doaj   +1 more source

Tephra From the 3 March 2015 Sustained Column Related to Explosive Lava Fountain Activity at Volcán Villarrica (Chile)

Frontiers in Earth Science, 2018
Exceptionally intense lava fountains at open conduit volcanoes are infrequent, hazardous and little-warned events. Studying their tephra falls may reveal conduit dynamics, eruption source parameters and fragmentation mechanisms.
Jorge E. Romero, Franco Vera, Margherita Polacci, Daniele Morgavi, Fabio Arzilli, Mohammad Ayaz Alam, Jorge E. Bustillos, Alicia Guevara, Jeffrey B. Johnson, José L. Palma, Mike Burton, Evelyn Cuenca, Werner Keller   +12 more
doaj   +1 more source

Long-term change of the eruption activities of Sakurajima volcano, Japan, inferred from the fallout tephra deposits

Frontiers in Earth Science, 2022
Stratigraphic analysis of fallout tephra deposits in and around a volcano provides a framework for understanding the long-term temporal change in the volcano’s activities.
Ayumu Nishihara, Ayumu Nishihara, Nobuo Geshi, Hideto Naruo   +3 more
doaj   +1 more source

Effects of tephra falls on vegetation: A Late‐Quaternary record from southern Italy [PDF]

Journal of Ecology, 2018
Abstract Impacts of tephra deposition on vegetation are recorded in a series of 10 high temporal resolution absolute pollen diagrams from Lago Grande di Monticchio, each diagram spanning a single tephra deposition event during the last glacial–interglacial cycle.
Judy R. M. Allen, Brian Huntley
openaire   +3 more sources

Estimating tephra fall volume from point-referenced thickness measurements

Geophysical Journal International, 2022
SUMMARYWe describe an algorithm for producing an approximate 95 per cent confidence interval (CI) for the bulk volume of tephra fall deposits, based on point-referenced tephra thickness measurements, and expert judgement. Applied to the Aso-4 eruption, our algorithm gives a 95 per cent CI of $[220\, \mathrm{km^3}, 370\, \mathrm{km^3}]$.
J C Rougier, R S J Sparks, W P Aspinall, S H Mahony   +3 more
openaire   +1 more source

Modeling Tephra Fall and Sediment-Water Flows to Assess Their Impacts on a Vulnerable Building Stock in the City of Arequipa, Peru

Frontiers in Earth Science, 2022
Arequipa, Peru’s second economic center hosting c. 1,110,000 inhabitants, is the largest South American city exposed to a large variety of natural hazards.
J.-C. Thouret, E. Arapa, S. Charbonnier, A. Guerrero, K. Kelfoun, G. Cordoba, D. Rodriguez, O. Santoni   +7 more
doaj   +1 more source

Temporal variations in discharge rate and component characteristics of tephra-fall deposits during the 2014–2015 eruption of Nakadake first crater, Aso Volcano, Japan

Earth, Planets and Space, 2019
The 2014–2015 eruption of the Nakadake first crater at Aso Volcano in southwestern Japan was characterized by continuous ash emissions and intermittent strombolian eruptions.
Yasuo Miyabuchi, Chihoko Hara
doaj   +1 more source

Vegetation responses to past volcanic disturbances at the Araucaria araucana forest‐steppe ecotone in northern Patagonia

Ecology and Evolution, 2022
Volcanic eruptions play an important role in vegetation dynamics and its historical range of variability. However, large events are infrequent and eruptions with a significant imprint in today's vegetation occurred far in the past, limiting our ...
Ricardo Moreno‐Gonzalez
doaj   +1 more source

Distal occurrence of mid-Holocene Whakatane Tephra on the Chatham Islands, New Zealand, and potential for cryptotephra studies

, 2011
The Whakatane Tephra, a rhyolitic tephra erupted ca. 5500 cal. BP from Okataina Volcanic Centre, central North Island, has been identified on the Chatham Islands which lie ˜900 km east of Christchurch, New Zealand.
Lowe, David J., Holt, Katherine A., Wallace, R. Clel, Hogg, Alan G., David J. Lowe, Katherine A. Holt, Alan G. Hogg, R. Clel Wallace   +7 more
core   +1 more source

Revised Minoan eruption volume as benchmark for large volcanic eruptions

Nature Communications, 2023
Despite their global societal importance, the volumes of large-scale volcanic eruptions remain poorly constrained. Here, we integrate seismic reflection and P-wave tomography datasets with computed tomography-derived sedimentological analyses to estimate
Jens Karstens, Jonas Preine, Gareth J. Crutchley, Steffen Kutterolf, Willem G. M. van der Bilt, Emilie E. E. Hooft, Timothy H. Druitt, Florian Schmid, Jan Magne Cederstrøm, Christian Hübscher, Paraskevi Nomikou, Steven Carey, Michel Kühn, Judith Elger, Christian Berndt   +14 more
doaj   +1 more source