Understanding Open-Vent Volcanism and Related Hazards
Continuous subsidence associated with the long-lasting eruption of Arenal Volcano (Costa Rica) observed by dry-tilt stations
Published:November 01, 2013
Mauricio M. Mora, Philippe Lesage, Fabien Albino, Gerardo J. Soto, Guillermo E. Alvarado, 2013. "Continuous subsidence associated with the long-lasting eruption of Arenal Volcano (Costa Rica) observed by dry-tilt stations", Understanding Open-Vent Volcanism and Related Hazards, William I. Rose, José Luis Palma, Hugo Delgado Granados, Nick Varley
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Arenal Volcano is a small (~1750 m above sea level, ~10 km3) stratovolcano that continuously erupted between July 1968 and October 2010. During this long-lasting eruption (over 42 yr), a large volume of material—~5.6 × 108 m3 of dense rock equivalent—has been extruded and has produced a thick and extended lava field, mainly on the western flank of the edifice. Measurements of ground deformation obtained using a network of dry-tilt stations are presented for the period 1986–2000. They show a continuous subsidence of the volcano with maximal amplitude on the western side. The load effect of...