W-2

• Epicenter


  Location on the surface of the earth directly above the focus
• Focus


  Point within the earth where energy is released
• The epicenter of the earthquake in the article is in Balayan Bay, Batangas City
• Magnitude


  Number that characterizes the relative size of an earthquake, the higher the number the stronger the earthquake
• The magnitude of the earthquake in the article is 5.4, which is moderate
• Seismic waves


  Energy released from an earthquake, recorded by seismographs, generated by the movement of tectonic plates
• Types of seismic waves

  • Body waves
  • Surface waves
• Body waves


  Travel into the interior of the earth
• Surface waves


  Travel through the crust, do not travel into the interior of the earth
• 1. waves (Primary waves)


  Fastest seismic waves, longitudinal, can move through solid rock and fluids
• 1. waves (Secondary waves)


  Slower than P-waves, transverse, can only move through solids
• Love waves


  Most damaging type of surface wave, named after British mathematician Augustus Edward H. Love
• Rayleigh waves


  Cause most of the shaking felt during an earthquake, named after scientist Lord Rayleigh (John William Strutt)