FONTE DO SISMO DE MARROCOS DE 2023 (MW6.8) INFERIDA A PARTIR DO CRUZAMENTO DE DADOS SÍSMICOS E GEODÉSICOS

Abstract

On September 8, 2023, at 22:11 UTC, an earthquake of magnitude 6.8 with epicenter near the village of Talat N'Yaaqoub, province of Al Haouz (Morocco), High Atlas region, shook violently the entire epicentral zone within a radius of more of 70km, seriously affecting the structures of more than 78,000 buildings and causing approximately 5,600 injuries and around 3,000 fatalities. This work presents part of the detailed source study of this earthquake, based on the interpretation of seismic and geodetic data, applying a crossing of methods. The results reveal a rupture beginning at a depth of 24km and evolving for around 10 s, on a sub-vertical fault plane oriented ENE-WSW with a dip towards NNW. The slips on the fault plane are mostly upward (reverse) but with a strike slip component in the WSW direction (left-lateral). The total seismic moment released by this source was M0=2.8x1019Nm