Effects of Earthquake on Landscapes
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Questions and Answers

Which natural trigger can lead to landslides?

  • Ground vibrations during earthquakes
  • Volcanic activity
  • Weathering of rocks
  • Intense rainfall (correct)
  • What is the PHILVOLCS Earthquake Rating Scale called when people are forcibly thrown to the ground and most buildings are totally damaged?

  • Very destructive
  • Devastating (correct)
  • Moderate
  • Mild
  • What is a common characteristic of areas where landslide hazards are most common in the Philippines?

  • Flat terrains
  • Coastal areas
  • High urban population density
  • Mountainous and inland regions (correct)
  • Which phenomenon is described as a process where loose saturated sand behaves like a liquid during an earthquake?

    <p>Liquefaction</p> Signup and view all the answers

    What is a significant feature of the Philippines' active volcanoes in terms of global ranking?

    <p>Most deadly and costly</p> Signup and view all the answers

    What type of structure may experience displacement, twisting, or overturning during an earthquake?

    <p>Tombstones</p> Signup and view all the answers

    What aspect of earthquake risks does the Dynaslope Project focus on?

    <p>Deep-seated and catastrophic landslides</p> Signup and view all the answers

    What factor is NOT mentioned as a mode of failure in landslides?

    <p>Eruption</p> Signup and view all the answers

    Which area is particularly prone to numerous landslides and rockfalls during an earthquake?

    <p>Mountainous regions</p> Signup and view all the answers

    What may cause man-made structures to sink, tilt, or topple during an earthquake?

    <p>Liquefaction and lateral spreading</p> Signup and view all the answers

    Which event can lead to massive landslides and liquefaction according to the text?

    <p>River water splashing over dikes</p> Signup and view all the answers

    Which feature is commonly observed when trees are violently shaken during an earthquake?

    <p>Roots being uplifted</p> Signup and view all the answers

    What type of flooding is characterized by shallow water flowing over a wide area?

    <p>Sheet flooding</p> Signup and view all the answers

    In what regions in the Philippines are considered earthquake-prone, experiencing about 16 felt earthquakes per year?

    <p>Eastern Visayas</p> Signup and view all the answers

    Which earthquake intensity level on the PHILVOLCS Earthquake Rating Scale is described as 'Felt by many people indoors, vibration similar to a light truck passing'?

    <p>Intensity III</p> Signup and view all the answers

    What factor contributes to earthquake risk in the Philippines due to its location over multiple tectonic plate boundaries?

    <p>Proximity to tectonic plate boundaries</p> Signup and view all the answers

    What phenomenon is a significant concern in central Luzon according to the text?

    <p>Liquefaction</p> Signup and view all the answers

    Which type of flood is characterized by destructive flood waves, quick occurrence, and often found in mountainous areas?

    <p>Flash flooding</p> Signup and view all the answers

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