Study on Vertical Crustal Deformations in Ecuador Based on GPS Data and Surface Loading Models
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The largest mass redistribution on the solid Earth's surface occurs as part of the hydrological cycle. These processes load and deform the solid Earth and consequently, an elastic response of the crust is induced. The general approach to predict this response involves the convolution of Green's functions and mass distribution models. Nevertheless, these models together do not conserve their global mass and the estimation of a total response by combining individual phenomena is not self-consistent. To solve this, a passive ocean response commonly is included. In order to study this process and its effects in the positions of geodetic sites, we compare 47 GPS vertical time series belonging to the continuous monitoring GNSS network of Ecuador and their respective loading signals over the last 20 years (2000 – 2020). The results indicate a moderate correlation between all the GPS heights and their loading signals and a reduction in the weighted root mean square (WRMS) in 35 of the 47 stations after filtering the total response, its value being higher in those stations with heights less than 3000 meters.
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