The next instant of interest is 20141125 1800UT based on 19411125 1803UT 8.1M earthquake in the Azores. The location of interest is the Northeaster Atlantic region. From a scientific paper on the earthquakes in that region. Gloria fault is one segment of the Eurasia-Nubia plate boundary. It is a large strike slip fault, located between 24W and 19W, with scarce seismic activity but which was the location of several large events during the XX Century, in particular the 25 November 1941 earthquake, a submarine strike-slip event of magnitude 8.3-8.4 and the 26 May 1975 with magnitude 7.9. Since the installation of the tide-gauge networks in several countries of the North East Atlantic area a significant amount of mareograms were obtained, concerning these events, in a number of coastal stations located along the European coasts. The most impacted areas were the north coast of Portugal where the sea overtopped some beaches, in November 1941, and the harbors of Azores, in 1975, where it was observed the fast withdraw of the sea followed by a strong influx over the highest water mark. We present here a systematic view of the tsunami potential of the Gloria Fault and using results of hydrodynamic simulations we compare model results against observations and tide records and we discuss the corresponding implications in the design of the NEAMTWS decision matrix. To properly constrain the source characteristics of the tsunamigenic earthquakes, relocation and scalar moment calculation of the 1941 earthquake from digitized seismograms have been performed. This work is a funded by project s TAGUSDELTA. Ref. PTDC/MAR/113888/2009 and PTDC/CTE-GIX/110205/2009
Posted on: Sun, 23 Nov 2014 21:48:27 +0000
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