Volcano number:345070
Region:Mexico and Central America
Country:Costa Rica
Geodetic measurements?Yes
Deformation observation?Yes
Measurement method(s):InSAR, GPS - campaign, Tiltmeter, EDM
Duration of observation:1982-2000 and 2002-present (tilt), 2002-2008 (EDM), 2006-2008 (campaign GPS), 2007-2010 (InSAR)
Inferred cause of deformation:Uncertain
Characteristics of deformation:

No deformation was detected at Turrialba between 1982 and 1996, after which there was a cumulative inflation of 2.3 μrad from October 1996 to January 1999 (Martini et al., 2010). Between 2001 and 2002 the flank EDM network detected 5 cm extension from the summit to a station 2.9 km distant (Martini et al., 2010). The flank EDM network recorded shortening from 2006-2007, followed by extension in 2008. In comparison, the summit EDM network recorded extension from 2006-mid 2007, followed by shortening from late 2007-2008, suggesting inflation of the volcano followed by deflation (Martini et al., 2010). Due to the proximity of the network to the summit, the authors were unable to constrain the source of the deformation.

No deformation was observed at Volcán Turrialba, due to low coherence in an ALOS survey of Central American volcanoes (Ebmeier et al., 2013).

Reference:Martini, F., Tassi, F., Vaselli, O., Del Potro, R., Martinez, M., Van del Laat, R., & Fernandez, E. (2010). Geophysical, geochemical and geodetical signals of reawakening at Turrialba volcano (Costa Rica) after almost 150 years of quiescence. Journal of volcanology and Geothermal research, 198(3), 416-432. doi:10.1016/j.jvolgeores.2010.09.021
Reference:Ebmeier, S. K., J. Biggs, T. A. Mather, and F. Amelung (2013), On the lack of InSAR observations of magmatic deformation at Central American volcanoes, J. Geophys. Res. Solid Earth, 118, 2571–2585, doi:10.1002/jgrb.50195.
Location:-83.767, 10.025

Aerial view of Turrialba from the north. Photo: Federico Chavarria Kopper, 1999.