1. factors
   1. time
   2. population
   3. quality of materials in buildings
   4. geology
   5. magnitude
   6. distance
   7. duration
2. After earthquake
   1. liquefaction
      1. sand/silt liquidates
         1. buildings
         2. sink
   2. fire
      1. wind
      2. spreads fast
   3. health
      1. water supply
      2. sewage
   4. tsunamies
      1. 800KM p/h
      2. waves
         1. 20 m in size
3. Limiting
   1. buildings
      1. support columns
         1. wrapped in wire cable
      2. foundations
         1. rollers
         2. rubber dampers
         3. springs
      3. built
         1. wider
            1. at base
         2. thinner
            1. at top
         3. crossbeams
      4. other
         1. hollow concrete blocks
         2. reinforced concrete roof
         3. reinforced steel corner pillars