Earthquake Hazards and Safety Measures

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Questions and Answers

What should you do when entering damaged buildings after an earthquake?

  • Climb through windows
  • Use stairs (correct)
  • Use elevators
  • Jump from one floor to another

Which of the following is a natural sign of an impending tsunami?

  • Strong wind blowing inland (correct)
  • Vibrational control devices
  • Earthquake-resistant materials
  • Cracks in the walls

What should you check for in your residence after an earthquake?

  • HVAC systems
  • Internet connectivity
  • Water, gas, electrical lines (correct)
  • Telecommunication systems

Which method can help make a building earthquake-resistant by absorbing seismic energy?

<p>Flexible foundation (B)</p> Signup and view all the answers

What is a common hazard associated with earthquakes that causes the ground to become unstable and move downhill?

<p>Liquefaction (A)</p> Signup and view all the answers

What is a common effect of earthquakes mentioned in the text?

<p>Flooding (C)</p> Signup and view all the answers

What should be done BEFORE an earthquake according to the text?

<p>Know the earthquake hazards in your area (D)</p> Signup and view all the answers

Which of the following is NOT recommended before an earthquake according to the text?

<p>Leave heavy objects on high shelves (D)</p> Signup and view all the answers

What should be secured to the wall before an earthquake?

<p>Heavy furniture/cabinets (B)</p> Signup and view all the answers

What are some items that should be stored properly BEFORE an earthquake?

<p>Harmful chemicals and flammable materials (A)</p> Signup and view all the answers

What is the definition of an earthquake?

<p>A sudden displacement of rocks below the earth's surface resulting in ground shaking (D)</p> Signup and view all the answers

Which type of earthquake is induced by rising lava or magma beneath active volcanoes?

<p>Volcanic Earthquake (C)</p> Signup and view all the answers

What is a fault?

<p>A zone of weakness where displacement has occurred or may occur again (A)</p> Signup and view all the answers

Which natural sign is indicative of an impending volcanic eruption?

<p>Increase in intensity and frequency of volcanic earthquakes (D)</p> Signup and view all the answers

What is the main cause of a tsunami?

<p>Underwater explosion (B)</p> Signup and view all the answers

What is the primary effect of liquefaction during an earthquake?

<p>'Jelly-like' behavior of solid ground (D)</p> Signup and view all the answers

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Study Notes

Earthquake Hazards

  • Effects of earthquakes include flooding, coastal erosion, drowning, and damage to properties
  • Earthquakes can trigger tsunamis, as seen in the 1976 Moro Gulf earthquake

Preparing for an Earthquake

  • Know the earthquake hazards in your area
  • Strap or bolt heavy furniture/cabinets to the wall
  • Check the stability of hanging objects like ceiling fans and chandeliers
  • Store breakable items, harmful chemicals, and flammable materials in lowermost secured shelves
  • Familiarize yourself with exit routes
  • Know the location of fire extinguishers, first aid kits, alarms, and communication facilities

Understanding Earthquakes

  • Earthquakes are a feeble shaking to violent trembling of the ground produced by the sudden displacement of rocks or rock materials below the earth’s surface
  • There are two types of earthquakes: volcanic and tectonic
  • In the Philippines, there is an average of 30 to 40 earthquakes per day

Types of Earthquakes

  • Volcanic earthquakes are induced by rising lava or magma beneath active volcanoes
  • Tectonic earthquakes are generated by the sudden displacement along faults in the solid and rigid layer of the earth
  • Active faults are faults that have moved within the last 10,000 years

During an Earthquake

  • Don't use elevators
  • Don't enter damaged buildings
  • Avoid using phones unless necessary
  • PANIC (check yourself and others for injuries, and water, gas, electrical lines, and other parts of your residence for damages)

Making a Building Earthquake-Proof

  • Create a flexible foundation
  • Use vibrational control devices
  • Utilize pendulum power
  • Use earthquake-resistant materials
  • Reinforce the building's structure

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