Sunday , August 1 2021

Experts from the CEP close to the earthquake forecasts – Special areas and risks – Dikaiologitika News



In particular, he is the research director of the Geodynamic Institute. The NSA science team led by Athanasios Ghana produced the first tectonic deformation maps on a pan-European scale as part of the European H2020 EPOS program.

It is stated that the tectonic deformation map on earth provides a great benefit for evaluating the seismic hazard and monitoring the geodynamic changes on the surface of the planet. Deformation is caused by changes in the elastic lithosphere (ie, in the solid cortex and upper mantle) caused by the tectonics of the plate.

These changes are related to the shape of a tectonic plate, the tectonic blocks ("blocks") by their verticals, and also by the rotation of the elastic energy. Measurements in tectonic deformations of these dimensions have increased significantly in recent years thanks to the use of satellite technologies and especially the Global Navigation Satellite System (GNSS).

The NCA team used tectonics from the 452 GNSS permanent stations, which were previously developed by a team of researchers from the University of French Grenoble. Using open-source software, Greek scientists are calculating various parameters. The basic unit of tectonic deformation is an ns / year (nanostrain / year) unit representing an annual change of one millimeter between two points with a distance of 1 000 km.

In large areas of the Eurasian plate, where seismicity is rare (eg, northern France and Poland), the deformation rate was found to be negligible (1-2 ns / year). ). In contrast, in areas of high seismicity, such as central Greece and central Italy, tectonic deformation is much larger and measured between 50 and 150 ns / year.

According to Mr. Ganza, these results are comparable to the similar results for Greece and Italy by other scientific groups. Tectonic deformation studies will continue in cooperation with the Swedish Lantmierer (LM) to produce such maps annually on an annual basis, including an increasing number of European GNSS stations.

SOURCE: RES


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