Megathrust Earthquake. A megathrust earthquake occurs in subduction zones where two crustal plates are colliding. They have occurred in the Cascadia Subduction Zone in the past and scientists predict another will occur. The 2012 Chile Earthquake and the 2011 Japanese earthquakes were earthquake megathrust events.
The statute defines an âunaccompanied alien childâ as a child under the age of 18 with no lawful status in the United States, and âwith respect to whom (i) there is no parent or legal guardian in the United States; or (ii) no parent or legal guardian in the United
Definition of alien for Students. 1  1 : different from what is familiar Keeping their hands clean was an alien idea to the young boys. 2  2 : from another country and not a citizen of the country of residence : foreign an alien resident. 3  3 : from somewhere other than the planet earth an alien spaceship.