1999 Oaxaca earthquake

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 M_w 7.4.^[3]

1999 Oaxaca earthquake

Show map of Oaxaca Show map of Mexico
UTC time	1999-09-30 16:31:15
ISC event	1656664
USGS-ANSS	ComCat
Local date	September 30, 1999
Local time	11:31 am
Magnitude	7.4 Mw
Depth	61 km
Epicenter	16.059°N 96.931°W / 16.059; -96.931
Max. intensity	MMI VIII (Severe)
Casualties	35 dead

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]

See also

• List of earthquakes in 1999
• List of earthquakes in Mexico
• 1999 Tehuacán earthquake

References

1. "USGS Earthquake Hazards Program: Earthquake Report: OAXACA, MEXICO". United States Geological Survey. Archived from the original on October 21, 2011. Retrieved October 22, 2011.
2. "The Mexico Earthquake, September 30, 1999". Mceer.buffalo.edu. September 30, 1999. Archived from the original on March 31, 2012. Retrieved October 22, 2011.
3. "Significant Earthquakes of the World". United States Geological Survey. Archived from the original on November 25, 2011. Retrieved October 22, 2011.
4. "Archived copy" (PDF). Archived from the original (PDF) on February 2, 2010. Retrieved August 28, 2010.{{cite web}}: CS1 maint: archived copy as title (link)
5. 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
6. "CNN Earthquake jolts Mexico City – September 30, 1999". CNN. Retrieved October 22, 2011.
7. "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)
8. "Quake Damaged Pre-hispanic Ruins, Archeological Sites". Chicago Tribune. October 3, 1999. Retrieved October 22, 2011.

External links

• The International Seismological Centre has a bibliography and/or authoritative data for this event.