|Region:||Mexico and Central America|
|Duration of observation:||2007-2010 (InSAR), 2009 (seismometer recorded tilt)|
|Inferred cause of deformation:||Magmatic|
|Characteristics of deformation:|
No deformation was observed at Fuego (detection threshold 5.1 cm/yr) during an ALOS survey of Central American volcanoes (Ebmeier et al., 2013). Lack of deformation despite continuous eruption over this period is explained by Fuego having an open conduit system which doesn’t pressurise over long time periods.
Broadband seismometers have been used to detect inflation and deflation associated with strombolian explosions (Lyons et al., 2012). The tilt is interpreted to show inflation beginning 20-30 minutes before the explosions, followed by deflation a few minutes prior to the explosions. The best fitting model source for the deformation is a point source 40 m below the surface and 120 m west of the summit.
|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.|
|Reference:||Lyons, J., G. Whaite, M. Ichihara and J. Lees (2012), Tilt prior to explosions and the effect of topography on ultra-long-period seismic records at Fuego volcano, Guatemala, Geophys. Res. Lett., 39, L08305, doi:10.1029/2012GL051184.|
View from the southeast of the twin volcanoes Fuego (left) and Acatenango (right). Photo: Lee Siebert, 1988 (Smithsonian Institution).