The 1999 Oaxaca earthquake occurred on September 30 at 11:31 local time (16:31 UTC) in Oaxaca, Mexico, 60 km NNW of Puerto Ángel.[1] The epicenter was located near San Agustin Loxicha.[2] It had a magnitude of Mw 7.4.[3]
Earthquake
This was an intraplate earthquake in the Cocos plate, with a normal-faulting mechanism. The fault plane was 90 km long and 45 km wide. The maximum slip was about 2.5 m, which was located about 20 and 40 km WNW of the hypocenter.[4][5] The maximum intensity reached MM VIII in southwestern Oaxaca, and could be felt strongly in Mexico City.[6]
Impact
The torrential rains and flooding preceding and following the temblor intensified the damage of this earthquake. Thirty-five people were reported dead.[7] The archeological site of the ancient Zapotec city of Monte Alban also suffered damage in this earthquake.[8]
^Castro, R. R. (2005), "Stochastic Modeling of the 30 September 1999 Mw 7.5 Earthquake, Oaxaca, Mexico", Bulletin of the Seismological Society of America, 95 (6): 2259–2271, Bibcode:2005BuSSA..95.2259C, doi:10.1785/0120040145
^"Archived copy"(PDF). proteccioncivil.gob.mx. Archived from the original(PDF) on April 14, 2008. Retrieved January 14, 2022.{{cite web}}: CS1 maint: archived copy as title (link)
