Coatepeque Caldera - Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics

Observations of Deformation

Volcano number:	343041
Region:	Mexico and Central America
Country:	El Salvador
Geodetic measurements?	Yes
Deformation observation?	Yes
Measurement method(s):	InSAR, GPS - campaign
Duration of observation:	2007-2010 (InSAR), 2009 (campaign GPS)
Characteristics of deformation:	No deformation was detected at the Coatepeque Caldera (detection threshold 6.1 cm/yr) during an ALOS survey of Central American volcanoes (Ebmeier et al., 2013). Campaign GPS measurements during 2009 showed up to 139 mm inflation between February and July at the Coatepeque Caldera, followed by lower magnitude deflation from July to November (Lechner, 2010). The deformation is attributed to activity in the hydrothermal system beneath the caldera.
Reference(s):	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.
Reference(s):	Lechner, H. N. (2010), Differential GPS as a monitoring tool on Volcano Santa Ana (Ilamatepec) and the Coatepeque Caldera, El Salvador, MSci. Thesis, Michigan Technological Univeristy. Accessed online at http://www.geo.mtu.edu/rs4hazards/Project%20resources/theses/lechner_thesis.pdf on 22/07/15
Location:	13.87, -89.55
REST API endpoint (JSON):	https://comet.nerc.ac.uk/wp-json/volcanodb/v1/volcano/4389