Proceedings of the 12th International INQUA meeting on paleoseismology, active tectonic and archaeoseismology

activity causing damage to the pyramids, as opposed to deliberate human intervention or weathering from climatic conditions on the basalts' staircase stones. The spatial distribution of EAEs and the orientation of the DBC suggest a seismic shock originating from the southwest and moving towards the northeast. This suggests the Middle American Trench as a potential seismic source. A megathrust earthquake exceeding magnitude 8 could plausibly account for the observed EAEs and the seismic intensity experienced by the city. However, it is also plausible that a nearby seismic event of lesser magnitude but closer seismic source may have been occurred. A C K N O W L E D G E M E N T S This work was supported by the Project FAMRAD (PID2020- 113407RB-I00) and is part of the research activities of PID2021- 123510OB-I00 (USAL) AEI/10.13039/501100011033/ of the Spanish Ministry of Science; the Program Lost Cities funded by the Gerda Henkel Foundation (AZ 02/LC/20). Fig. 4: Time-chart for the interpreted main events during the timeline of the Teotihuacan. Five destructive earthquakes have been interpreted and represented by the Aztec intensity scale proposed by Garduño-Monroy (2016). The estimated ages of the ancient earthquakes are in red. Destruction of Cuicuilco, and the final migration to Xochicalco are included. The size of the pyramids indicates the age of enlargement and rebuilding (After Pérez-López et al., 2024).