Displacement of geodetic vertices due to the earthquake of February 27, 2010 from the regions of Maule to Los Lagos, Chile

Abstract

The present study address the displacement of geodetic vertices produced by the earthquake on February
27, 2010 in the central - southern Chile, with hypocenter in the sector of Concepción, covering data from the
regions of Maule to the Lakes. For this information was collected through GPS, GNSS and the fixed active
stations and passive stations of the geodetic vertices in a period of ten years from 2010 to 2020. From these
data the distance they had from their point of origin was determined.
In Chile the deformation is mainly due to the seismic cycle produced by the interaction between the tectonic
plates (Nazca, South American, Antarctic), this cycle is constituted by the period prior to the occurrence of
an earthquake, the displacement during the earthquake and post-relaxation. earthquake. To understand
these movements, we use Spacial geodesy, in which we obtain information from satellites; with this
information, the position of points on the earth's surface is determined through coordinates (latitude,
longitude, height) for the materialization of the geodetic network and thus form the geodetic vertices. With
these data it is possible to estimate the total displacement of the georeferenced points in the field during the
10 years of study.