Citation:
Abstract:
Based on the results of a previous terrestrial gravity survey that was carried out in Athens basin (Greece) some indications of correlation between terrestrial gravity data and isoseismal maps of Athens earthquake (7/9/1999) had been revealed. In this paper, we will present a research for the same area based on a new approach, which investigates the possible correlation of the same isoseismal maps with only satellite gravity data from GOCE and GRACE but also with a combined gravity model of updated terrestrial, marine and satellite data. The combined gravity model of Greece was constructed based on the least-squares collocation. The previous correlation of isoseismal maps with the older terrestrial gravity data was quite obvious and clear since the areas with the lower gravity values were simultaneously the ones with the greatest damage distribution. On the other hand, from the satellite gravity data and the combined gravity model we could not identify a clear and obvious correlation, as was expected, due to the smaller resolution spacing of the satellite data.