INTERPRETING A HEAVILY BIOTURBATED TEPHRA FALL DEPOSIT AT KINGS BOWL, IDAHO

2016 ◽  
Author(s):  
Allison Trcka ◽  
◽  
Erin Sandmeyer ◽  
Shannon Kobs Nawotniak
Keyword(s):  
Fall Deposit ◽  
Tephra Fall

scholarly journals The Orange Tuff: a Late Pleistocene tephra-fall deposit emplaced by a VEI 5 silicic Plinian eruption in West Java, Indonesia

2019 ◽  
Vol 81 (6) ◽  
Author(s):  
Christopher J. Harpel ◽  
Kushendratno ◽  
James Stimac ◽  
Cecilia F. Avendaño Rodríguez de Harpel ◽  
Sofyan Primulyana
Keyword(s):  
Late Pleistocene ◽  
Plinian Eruption ◽  
Fall Deposit ◽  
West Java ◽  
Tephra Fall

Chemical variations of tephra-fall deposit leachates for three eruptions from Popocatépetl volcano

2002 ◽  
Vol 113 (1-2) ◽  
pp. 61-80 ◽  
Author(s):  
M.A. Armienta ◽  
S. De la Cruz-Reyna ◽  
O. Morton ◽  
O. Cruz ◽  
N. Ceniceros
Keyword(s):  
Fall Deposit ◽  
Tephra Fall ◽  
Popocatépetl Volcano ◽  
Popocatepetl Volcano

scholarly journals Eruptive activity of Planchón-Peteroa volcano for period 2010-2011, Southern Andean Volcanic Zone, Chile

2015 ◽  
Vol 43 (1) ◽  
pp. 20 ◽  
Author(s):  
Felipe Aguilera ◽  
Oscar Benavente ◽  
Francisco Gutiérrez ◽  
Jorge Romero ◽  
Ornella Saltori ◽  
...  
Keyword(s):  
Fall Deposit ◽  
Tephra Fall ◽  
Crater Lakes ◽  
Active Crater ◽  
Maule Earthquake ◽  
Magmatic Reservoir ◽  
Eruptive Period ◽  
Main Component ◽  
Thickness Variable ◽  
Fall Deposits

Planchón-Peteroa volcano started a renewed eruptive period between January 2010 and July 2011. This eruptive period was characterized by the occurrence of 4 explosive eruptive phases, dominated by low-intensity phreatic activity, which produced almost permanent gas/steam columns (200-800 m height over the active crater). Those columns presented frequently scarce ash, and were interrupted by phreatic explosions that produced ash columns 1,000-3,000 m height in the more intense periods. Eruptive plumes were transported in several directions (NW, N, NE, E and SE), but more than half of the time the plume axis was 130-150° E, and reached a distance up to 638 km from the active crater. Tephra fall deposits identified in the NW, N, NE, E and SE flanks covered an area of 1,265 km2, thickness variable from 4 m (SE border of active crater) to ~0.5 cm 36.8 km SE and ~8 km NW from active crater, respectively, corresponding to a minimum volume of 0.0088 km3. Tephra fall deposit is exclusively constituted of no juvenile fragments including: lithics fragments as main component, quartz and plagioclase crystals, some oxidized lithics, and occasional presence of Fe oxide, and less frequently Cu minerals, as single fragments. We present new field-based measurements data of the geochemistry of gas/water from fumaroles and acid crater lakes, and fall deposit analysis, that integrated with the eruptive record and GOES satellite data, suggests that the eruptive period 2010-2011 has been related to an increasing of heat and mass transfer from hydrothermal-magmatic reservoirs, which would have been favoured by the formation and/or reactivation of cracks after 8.8 Mw Maule earthquake in February 2010. This process also allowed the ascent of fluids from a shallow hydrothermal source, dominated by reduced species as H2S and CH4, during the entire eruptive period, and the release of more oxidizing fluids from a deep magmatic reservoir, dominated by acid species as SO2, HCl and HF, increasing strongly after the end of the eruptive period, probably since October 2011. The eruptive period was scored with a magnitude of 3.36, corresponding to a VEI 1-2.

THE OPENING SUBPLINIAN PHASE OF THE HEKLA 1991 ERUPTION: PROPERTIES OF THE TEPHRA FALL DEPOSIT

2017 ◽  
Author(s):  
J. Gudnason ◽  
◽  
T. Thordarson ◽  
B.F. Houghton ◽  
G. Larsen
Keyword(s):  
Fall Deposit ◽  
Tephra Fall

The opening subplinian phase of the Hekla 1991 eruption: properties of the tephra fall deposit

2017 ◽  
Vol 79 (5) ◽  
Author(s):  
Jonas Gudnason ◽  
Thor Thordarson ◽  
Bruce F. Houghton ◽  
Gudrun Larsen
Keyword(s):  
Fall Deposit ◽  
Tephra Fall

Eruption of the Nevado del Ruiz Volcano, Colombia, On 13 November 1985: Tephra Fall and Lahars

Science ◽  
1986 ◽  
Vol 233 (4767) ◽  
pp. 961-963 ◽  
Author(s):  
J. L. NARANJO ◽  
H. SIGURDSSON ◽  
S. N. CAREY ◽  
W. FRITZ
Keyword(s):  
Tephra Fall

scholarly journals Potential and limitations of risk scenario tools in volcanic areas through an example in Mount Cameroon

2013 ◽  
Vol 1 (2) ◽  
pp. 1081-1118 ◽  
Author(s):  
P. Gehl ◽  
C. Quinet ◽  
G. Le Cozannet ◽  
E. Kouokam ◽  
P. Thierry
Keyword(s):  
Adverse Events ◽  
Residential Buildings ◽  
Integrated Approach ◽  
Volcanic Risk ◽  
Physical Damage ◽  
Tephra Fall ◽  
Mount Cameroon ◽  
Physical Impact ◽  
Risk Scenario

Abstract. This paper presents an integrated approach to conduct a scenario-based volcanic risk assessment on a variety of exposed assets, such as residential buildings, cultivated areas, network infrastructures or individual strategic buildings. The focus is put on the simulation of scenarios, based on deterministic adverse events input, which are applied to the case-study of an effusive eruption on the Mount Cameroon volcano, resulting in the damage estimation of the assets located in the area. The work is based on the recent advances in the field of seismic risk. A software for systemic risk scenario analysis developed within the FP7 project SYNER-G has been adapted to address the issue of volcanic risk. Most significant improvements include the addition of vulnerability models adapted to each kind of exposed element and the possibility to quantify the successive potential damages inflicted by a sequence of adverse events (e.g. lava flows, tephra fall, etc.). The use of an object-oriented architecture gives the opportunity to model and compute the physical damage of very disparate types of infrastructures under the same framework. Finally, while the risk scenario approach is limited to the assessment of the physical impact of adverse events, a specific focus on strategic infrastructures and a dialogue with stakeholders helps in evaluating the potential wider indirect consequences of an eruption.

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