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Are the ashes from the latest eruptions (2010–2016) at Turrialba volcano (Costa Rica) related to phreatic or phreatomagmatic events?
(Elsevier, 2016-09-15)
The initial eruptive episodes of explosive eruptions are classified as phreatic if the amount of juvenile material (scoria, glass, pumice) is null, and the amount of fresh accidental lithics, and hydrothermally altered ...
Short-period volcanic gas precursors to phreatic eruptions: Insights from Poás Volcano, Costa Rica
(Elsevier, 2016-03)
Volcanic eruptions involving interaction with water are amongst the most violent and unpredictable geologic phenomena on Earth. Phreatic eruptions are exceptionally difficult to forecast by traditional geophysical techniques. ...
The last step of the volcanic unrest in Turrialba volcano: a new stage of magmatic eruptions
(2015)
In 1864-1866, Turrialba volcano had a strombolian eruption with some phases of phreatic and phreatomagmatic activity, that covered the Central Valley of Costa Rica with a variable thickness of ash. During this eruption, ...
2006-2007 explosive activity and erupted products of Ubinas volcano (Peru)
(Instituto Geológico, Minero y Metalúrgico - INGEMMETPE, 2008)
[ENG] Ubinas, the most historically active volcano in southern Peru, has shown 24 degassing and ashfall episodes since A.D.1550. A population of ~3500 is living within 12 km of Ubinas and has been periodically affected ...
Long-period seismic events at Ubinas volcano (Peru): their implications and potentiality as monitoring tool
(EGU General Assembly, 2012)
Ubinas volcano (Southern Peru) is an active andesitic stratovolcano, located 75 km East of Arequipa City, with an average occurrence of 6-7 eruptions per century and persistent fumarolic and phreatic activity. The most ...
Risk assessment and mitigation at Copahue Volcano
(Springer, 2016)
"Risk assessment" is a relatively new concept in Argentina, since the veryfirst hazard map was only recently constructed on the basis of the 1992 eruption of Copahue volcano (Patagonia). Copahue is considered a very active ...
Renewed Explosive Phreatomagmatic Activity at Poás Volcano, Costa Rica in April 2017
(Frontiers in Earth Science, 2018-10-16)
Phreatic and phreatomagmatic eruptions at volcanoes often present no short termprecursory activity, making them a challenge to forecast. Poás volcano, Costa Rica, exhibits cyclic activity with phreatic and some phreatomagmatic ...
Mecanismos de emplazamiento y destrucción de los domos lávicos asociados a la caldera del cerro Blanco, puna australMechanisms of emplacement and destruction of lava domes related to the Cerro Blanco Caldera, southern Puna
(Asociación Geológica Argentina, 2017-06)
En la Puna Austral se desarrolló durante el Cuaternario un importante sistema de calderas de colapso con depósitos piroclásticos y lavas de composiciones ácidas asociados: El Complejo Volcánico Cerro Blanco. Como parte de ...
Evolution of the eruption of the Ubinas Volcano (Peru) 2006
(Instituto Geológico, Minero y Metalúrgico - INGEMMETPE, 2006)
[Abstract] The gases emanations of Ubinas volcano (16º 22' S, 70º 54' O; 5672 altitude. ), was increased lightly during July of 2005, after these was almost void since 2001. The emitted gases came up to 200 - 300 m of ...
Geophysical, geochemical and geodetical signals of reawakening at Turrialba volcano (Costa Rica) after almost 150 years of quiescence
(Elsevier, 2010-11)
Turrialba is a basaltic–andesitic stratovolcano (3340 masl), in the Cordillera Volcánica Central in Costa Rica. After the last eruption (1864–1866), volcanic manifestations were limited to weak fumarolic discharge (continuous ...