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
These are not official terms used by the U.S. Citizenship and Immigration Service. The term âlegal alienâ was coined in 1798 from the Alien and Sedition Act. âIllegal alienâ has no legal definition but is widely used to define undocumented individuals. According to a 2004 Government Accountability Office (GAO) report, there is no federal definition of an undocumented immigrant. The GAO defined an âundocumented alienâ as a person who enters the U.S. without legal permission or fails to leave the U.S. when their permissible time ends.