CIRES was tapped to develop a similar system for the state of Oaxaca after it was struck by a Mw 7.4 earthquake in 1999 . Beginning in 2000 , CIRES and the state government developed an early warning system for Oaxaca , which entered into service in 2003 . The two formerly separate earthquake warning systems were combined in 2005 to form SASMEX
a Mw 7.4 earthquake in 1999
1999 Oaxaca earthquake
Mexican Seismic Alert System