Mexico- Earthquake prediction Flashcards
what locational factor makes mexico city more vulnerable to earthquakes
built on a former lake bed because the soft clay amplifies the tremors
what is the typical time of opportunity in mexico?
60 seconds
what is the time of opportunity?
the time for the authorities to call the warning of the earthquake and for citizens to find cover
what is the early warning system (SASMEX)?
sensors pinpoint the location and intensity of an earthquake and if is considered to be a threat then alerts are sent to state and local governments
how does authorities issue mass warnings of a earthquake?
Radio and tv broadcasts
municipal loudspeaker network
smartphone apps
how have authorities made sure people are prepared for an earthquake?
earthquake simulations have taken place monthly in hotels, schools and offices
what are people on the first and ground floors of a office advised to do in an earthquake?
evacuate to pre determined meeting points
what were the people on the second or higher floors of an office advised to do in an earthquake?
drop, cover, hold
how have the citys most critical buildings benefited from prevention tactics against earthquakes?
they have been structurally reinforced using dampers (shock absorbers) and deep foundations
how many of mexico citys buildingsare not classsified as ‘engineered’
40%
what strategy has been implemented in order to construct infrastructure to a higher level and public buildings to be relocated to safer zones than before the earthquake?
build, back, better
