Mexico City plans text quake alerts
The government of quake-prone Mexico City is planning to send earthquake alerts by text message and through social networking sites such as Facebook and Twitter.
Mayor Marcelo Ebrard said he hopes to have the system working by September 19, the anniversary of the 8.1-magnitude earthquake in 1985 that killed as many as 10,000 people.
Mexico City currently has an early warning system that uses sirens to alert city residents about quakes that occur hundreds of miles away on Pacific coast fault lines. Some people complain the alarms in their neighbourhoods cannot be heard or do not go off.
Mr Ebrard said that his administration is talking to numerous service providers to put the new alert system in place.