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
1 Illegal aliens.. 2  A more pejorative form of illegal immigrant.. 3  The word alien can be used to refer to a non-naturalized immigrant, but it also arrives with the context of its dictionary definition: unfamiliar and disturbing or distasteful..  4 Undocumented workers..