Evaluating links between deformation, topography and surface temperature at volcanic domes: Results from a multi-sensor study at Volcán de Colima, Mexico

Load Stress Controls on Directional Lava Dome Growth at Volcán de Colima, Mexico

“…Thus, most InSAR studies focus on crustal deformation affecting the flanks of dome-growing volcanoes (Salzer et al, 2014;Welch and Schmidt, 2017). Lava dome cooling and subsidence (Salzer et al, 2017) and cracks splitting a lava dome have also been detected (Walter et al, 2015). For monitoring lava domes, the analysis of the SAR amplitude is particularly valuable as it can be used to document and quantify lava dome growth e.g., at Merapi and Sinabung, Indonesia (Pallister et al, 2013c(Pallister et al, , 2018 and Mount Cleveland, Alaska (Wang et al, 2015).…”

“…Therefore, many recent studies are aimed at monitoring and understanding the dynamics of volcano deformation. Small-scale deformation has been observed with interferometrically processed TerraSAR-X (TSX) data (Salzer et al, 2014(Salzer et al, , 2017, identifying shallow pressurization and suggesting the existence of a dense plug and a complex conduit system at shallow depth. At the surface, morphological and volumetric observations of the lava dome at Volcán de Colima have previously been studied based on airborne LiDAR in 5 m resolution (Davila et al, 2007) and TanDEM-X satellites in an approximate 10 m resolution (Kubanek et al, 2014).…”

UAS-based tracking of the Santiaguito Lava Dome, Guatemala

“…A common structural feature is a ring-shaped anomaly observed around the flat top of a lava dome 24,25 . Although attempts to link such thermal anomalies to dome deformation have been made previously, the data resolution did not allow for conclusive statements 26 . Thermal imaging can also improve surface observations in low visibility due to degassing, cloudy conditions, or bad lighting 27 .…”

Absence of Detectable Precursory Deformation and Velocity Variation Before the Large Dome Collapse of July 2015 at Volcán de Colima, Mexico

“…The integration of new observations and analysis methods to the monitoring system may also help detecting forthcoming eruptions. For example, pixel offsets tracking methods applied to optical images acquired at small distance from the dome might bring useful information regarding the dome growth rate (Salzer et al, 2016) while high resolution SAR images can provide information on the dome deformation in quiescent periods (Salzer et al, 2017). Indeed, a hypothetical observation of both summit deformation and velocity variations, with amplitude larger than the usual fluctuations (i.e., >0.2%) and not related with strong tectonic earthquakes, could indicate a possible impending eruption and should be taken into account by the warning system of Volcán de Colima.…”