The 1965 Oaxaca earthquake occurred in
Mexico on August 23 at 13:46 with a
moment magnitude of 7.5.[1][2] Five people were reported dead in
Mexico City and one in
Oaxaca. There was an anomalous change in seismic activities before the earthquake. There was a quiescent stage from late 1963 to mid-1964, and it was followed by a renewal of seismic activities before the main shock.[3] This earthquake was a shallow thrust earthquake in the interplate
subduction zone, in which the
Cocos Plate is subducting beneath the
North American Plate.[4][5]
^Chael, Eric P; Stewart, Gordon S (1982), "Recent large earthquakes along the Middle American Trench and their implications for the subduction process", Journal of Geophysical Research: Solid Earth, 87 (B1): 329,
Bibcode:
1982JGR....87..329C,
doi:
10.1029/JB087iB01p00329
^Iglesias, A; Singh, S. K; Ordaz, M; Santoyo, M. A; Pacheco, J (2007), "The Seismic Alert System for Mexico City: An Evaluation of Its Performance and a Strategy for Its Improvement", Bulletin of the Seismological Society of America, 97 (5): 1718,
Bibcode:
2007BuSSA..97.1718I,
doi:
10.1785/0120050202