Mexico City residents continue to recover from last week’s massive 7.1 magnitude earthquake, and officials question whether a proper warning system could’ve reduced the number of casualties.

UC Davis Professor Dr. Jonathan Rundle has studied earthquakes for decades and helped develop a new system called “seismic nowcasting”, which uses previous history on tremors to predict future quakes. Rundle explains which California cities face the greatest risks and what financial modeling can teach us about earthquake forecasting.