Indian Ocean Tsunami Alert after Earthquake off the coast of Indonesia's Aceh Province

A tsunami watch was declared after two major earthquakes occurred off the coast of Indonesia's Aceh province on 11 April 2012. The first earthquake measured 8.6 on the Richter scale with an after shock following two hours later. The 8.6 undersea earthquake was the largest "strike-slip" quake ever recorded where two sides of the fault slip horizontally past each.


  1. Massive Indonesia quakes trigger tsunami alert
  2. First video: Moment of Indonesia earthquake, Aceh locals flee amid tsunami warning
  3. 8.7 & 8.2 Magnitude EARTHQUAKE Hits INDONESIA (Aceh) - TSUNAMI WARNING!
  4. Tourists in Phuket, Southern Thailand head to high ground amid fears that a tsunami could strike again.
  5. Learning Tasks
    Why is this region so prone to seismic activity? 
    Although two large earthquakes were experienced why did this particular seismic event not produce a tsunami? 
    Why was the death toll and level of damage far less than the previous earthquakes in the region? 
    Consider what it must have been like to be a resident of Aceh Province knowing that another huge earthquake had taken place? 
    What evidence is there that the countries in the region and around the Indian Ocean were better prepared to deal with the consequences of this earthquake?