(who knows yet) The strongest ever recorded has been a 9.5 magnitude in Chile (1977) http://earthquake.usgs.gov/earthquakes/world/10_largest_world.php. mercalli scale. Measures earthquake damage, the level of intensity of the earthquake, and the effect of the event on people.
Air Force Memo For Record (MFR) The memorandum for record (commonly referred to as Memo for Record, MR, or MFR) is used as an informal, in-house document. People working together generally pass information back and forth verbally but sometimes it needs to be recorded and filed for future reference. A Memo for Record is perfect for this purpose.
VFR-Visual Flight Rules that govern the procedures for conducting flight under visual conditions. The term is also used in the US to indicate weather conditions that are equal to or greater than minimum VFR requirements. Also used by pilots and controllers to indicate a specific type of flight plan.OTORCRAFT-A heavier-than-air aircraft that depends principally for its support in flight on the lift generated by one or more rotors. Includes helicopters and gyroplanes. RUDDER-The movable part of a vertical airfoil which controls the YAW of an aircraft; the fixed part being the FIN.