San Diego/Tijuana Earthquake Scenario
What is involved in a scenario plan? And Why Update it

In 1990 EERI created a scenario study of an earthquake along the San Diego/Tijuana Border area.  And now, as we discussed in an earlier Post, they are doing a new one.  Today there are more buildings, more people, our understanding of earthquakes is greater and we have new tools to develop the scenario; ultimately to help keep the people in the region safer in case of a major earthquake.

When we talk about scenarios what is involved?  The EERI 2017 project includes dozens of different experts in three working groups. They cover the geotechnical issues, infrastructure and economics and social impacts.  A deeper look at the infrastructure team gives us a better understanding of what has changed since 1990. This is their work scope:

  • Lifelines (water, wastewater, power, communications, natural gas and liquid fuels, dams)
  • Transportation (roads/highways, bridges, ports, rail).
  • Buildings (URM/unreinforced masonry/brick, historic buildings, commercial and residential, low-rise, mid-rise, high- rise, pre-1980 concrete, post-1980 concrete, pre-Northridge steel, industrial facilities, open-front buildings).
  • Essential Facilities (hospital, schools, police and fire stations, airport etc.).
    • Health & school systems on both sides of the border
  • Border Stations
  • Risk Assessment & Loss Modeling

This project helps illustrate that earthquakes do not recognize international boundaries.