11 articles in this issue
Jon J. Major,Luis E. Lara
Chaitén Volcano erupted unexpectedly in May 2008 in one of the largest eruptions globally since the 1990s. It was the largest rhyolite eruption since the great eruption of Katmai Volcano in 1912, and the first rhyolite eruption to have at least some of it... see more
Sebastian F.L. Watt,David M. Pyle,Tamsin A. Mather
The 2008 eruption of Chaitén Volcano was widely cited as the first activity at the volcano for over 9000 years. However, we have identified evidence from proximal pyroclastic deposits for three additional explosive eruptions of Chaitén within the past 500... see more
Álvaro Amigo,Luis E. Lara,Victoria C. Smith
Tephra fall deposits and one large ignimbrite close to Chaitén and Michinmahuida Volcanoes were analyzed for chemistry and radiocarbon dated to correlate the eruptive units and establish the timing of eruptions. These data suggest that both volcanoes were... see more
Luis E. Lara,Rodrigo Moreno,Álvaro Amigo,Richard P. Hoblitt,Thomas C. Pierson
Prior to May 2008, it was thought that the last eruption of Chaitén Volcano occurred more than 5,000 years ago, a rather long quiescent period for a volcano in such an active arc segment. However, increasingly more Holocene eruptions are being identified.... see more
María Soledad Osores,Arnau Folch,Estela Collini,Gustavo Villarosa,Adam Durant,Gloria Pujol,José G. Viramonte
The 2008 Chaitén Volcano eruption began on 2 May 2008 with an explosive phase that injected large amounts of tephra into the atmosphere. During the first week of the eruption, volcanic ash clouds were transported for hundreds of kilometres over Argentina ... see more
John Stith Pallister,Angela K. Diefenbach,William C. Burton,Jorge Muñoz,Julia P. Griswold,Luis E. Lara,Jacob B. Lowenstern,Carolina E. Valenzuela
We use geologic field mapping and sampling, photogrammetric analysis of oblique aerial photographs, and digital elevation models to document the 2008-2009 eruptive sequence at Chaitén Volcano and to estimate volumes and effusion rates for the lava dome. W... see more
Marc Bernstein,Andrés Pavez,Nick Varley,Patrick Whelley,Eliza S. Calder
Airborne thermal images of the Chaitén rhyolite lava dome were obtained on three occasions between January 2009 and January 2010. These images were useful for understanding the nature and pace of growth of the newly extruded lava, which formed a complex o... see more
Mirella Piña-Gauthier,Luis E. Lara,Klaus Bataille,Andrés Tassara,Juan C. Báez
GPS data from stations around the Chaitén Volcano show a co-eruptive pattern of inflation and deflation that correlates well with the estimated effusion rate during the 2008-2009 eruption. Axisymmetric radial deflation is coeval with periods of fast dome ... see more
Jon J. Major,Thomas C. Pierson,Richard P. Hoblitt,Hugo Moreno
Explosive activity at Chaitén Volcano in May 2008 and subsequent dome collapses over the following nine months triggered multiple, small-volume pyroclastic density currents (PDCs). The explosive activity triggered PDCs to the north and northeast, which fe... see more
Frederick J. Swanson,Julia A. Jones,Charles M. Crisafulli,Antonio Lara
The 2008-2009 eruption of Chaitén Volcano (Chile) involved a variety of volcanic and associated hydrologic processes that damaged nearby forests. These processes included coarse (gravel) and fine (silt to sand) tephra fall, a laterally directed blast, flu... see more