• Skyscrapers and other large structures built on soft ground must be anchored to bedrock.
  • Wood and steel are better than brick, stone, and adobe, which are brittle and will break.
  • Communities must weigh how great the hazard is, what different building strategies will cost, and how much risk they are willing to take.
  • Cost is an important factor in deciding how safe to make the structures in an area.
  • Fires start because seismic waves rupture gas and electrical lines.
  • The shapes of pipes can make a big difference.
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