Seismic Design Categories and Earthquake Hazard

Seismic Design Categories

• Seismic Design Categories (SDC) help interpret earthquake maps, providing insight into earthquake hazard potential and shaking effects
• SDC Map Color indicates the probability of experiencing damaging earthquake effects:
  • White: Very small probability of experiencing damaging earthquake effects
  • Gray: Moderate intensity shaking, felt by all, with slight damage
  • Yellow: Strong shaking, with damage negligible in well-designed buildings and slight to moderate in ordinary structures
  • Light Brown: Very strong shaking, with damage slight in specially designed structures and considerable in ordinary buildings
  • Darker Brown (D1) and Darkest Brown (D2): Very strong shaking, with damage considerable in specially designed structures and great in poorly built structures
  • Red: Near major active faults, capable of producing the most intense shaking, with damage considerable in specially designed structures and great in substantial buildings

Map Interpretation

• Map interpretation involves analyzing a map to navigate and understand its components
• 7 important components of a map:
  • Compass rose (orientation)
  • Title (map description)
  • Symbols (pictures instead of words)
  • Legend or Key (explains symbol meanings and colors)
  • Color (highlights important information)
  • Scale (map proportion to real life)
  • Grid Reference (intersecting lines to locate specific places)

Emergency Preparedness

• Prepare an Emergency Go Bag with essential items for 3-4 days, including:
  • Drinking water
  • Non-perishable food
  • Flashlight
  • Whistle
  • Battery-powered radio
  • Extra batteries
  • First aid kit
  • Sanitation and personal hygiene items
  • Extra clothes and undergarments
  • Copies of personal documents
  • Mobile phones with chargers
  • Family and emergency contact information
  • Extra cash and specific items needed by family members
• Create a Family Preparedness Plan, including:
  • How family members will contact each other
  • Designated meeting place
  • Tasks assigned to each member
• Be Informed:
  • Learn about potential hazards in your community
  • Coordinate with local government and national agencies for emergency plans and updates

Hydro-Meteorological Hazard Maps

• Type I: Two pronounced seasons, dry from November to April, and wet during the rest of the year
• Type II: No dry season, with a very pronounced rainfall from November to April, and wet during the rest of the year
• Type III: Seasons not very pronounced, relatively dry from November to April, and wet during the rest of the year
• Type IV: Rainfall is more or less evenly distributed throughout the year

This quiz covers Seismic Design Categories, interpreting earthquake maps, and the effects of shaking on buildings and people. It includes the different map colors and the corresponding hazard potential and shaking intensity.