earthquake

• Earthquakes can also be triggered by volcanic activity, as magma movement can cause the surrounding rocks to fracture and create seismic waves.
• also known as tremor is the perceptible shaking of the surface of the earth, resulting from the sudden release of energy in the Earth’s crust that creates seismic waves

  earthquake
• the area on the surface of Earth

  epicenter
• is the lowering of land due to various causes

  subsidence
• one of the most common hazards inflicting tremendous damage to human life and material properties

  earthquake
• It is a natural phenomenon that poses great danger

  earthquake
• This boundary that runs from the north all the way to the south of the country is called?

  the philippine fault system
• the   Philippine records an average earthquakes of varying magnitude every year.

  200-250
• it is caused by the passage of SEISMIC WAVES, forms of energy that travel through the different layers of earth caused by vibration

  ground shaking
• This occurs when ground movement happens on a fault line and breaks through to the surface. This may happen in an instant during an earthquake

  ground or surface rupture
• fault rupture follows pre-existing faults known as ?

  zone of weakness
• This occurs when seismic shaking causes loose materials in the soil to mix with groundwater or soil saturated with water.

  liquefaction
• This may be due to downward or vertical displacement on one side of a fault

  earthquake induced ground subsidence and lateral spreading
• what is the meaning of tsunami in japanese?

  harbor wave
• it is a Japanese word that means “HARBOR WAVE”

  tsunami
• includes a wide range of ground movement, such as rock falls, deep failure of slopes and shallow debris flows.

  landslide
• ---are frequently triggered by strong ground motions. They are important secondary earthquake hazard

  earthquake induced landslide
• Some zoologists hypothesize that some animal species like elephants have the ability to sense subsonic RAYLEIGH WAVES from an earthquake or a tsunami

  animal behavior
• an elephant can sense them

  rayleigh waves
• - This is an observable natural sign of an impending tsunami that is noteworthy

  drawback
• it will occur as the shoreline recedes dramatically,exposing normally submerged areas

  drawback
• A typical wave period for a damaging tsunami is about what minute?

  12 minutes
• All waves have a positive and negative peak

  ridge to a trough
• sustained the worst damage when its terraced front collapsed onto the lobby area, killing about 50people.

  hyatt terraces plaza
• Baguio City was described to be a virtual----

  war zone
• are landforms characterized by two colliding plates where one descends and the other stays above.

  trenches
•   If you are indoors always stay calm. Duck under sturdy table

  and protect your head. Remember the

  drop cover and hold
• whatever you are doing or whatever position you are in, immediately drop down to the floor

  drop
• Find a sturdy piece of furniture, such as a table or chair and take cover under it. It is important to protect your head and neck with your arms. Be watchful of objects that can harm you such as breakable mirrors or glass or tall things.

  cover
• Hold on the sturdy piece of furniture and prepare to move with it until the earthquake stops or when all other objects have stopped moving

  hold