Fire terminology
vCrown fire - a severe fire where flames travel from tree to tree at the level of the tree’s crowns or tops.
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vFire line - a zone along a fire’s edge where there is little or no fuel available to the fire
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vBackfire -  a fire started to stop an advancing fire by creating a burned area in its path
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vFirebrand - flaming or glowing fuel particles that can be carried naturally by wind, convection currents or gravity into unburned fuels
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vSpotting - outbreak of secondary fires as firebrands or other burning materials are carried ahead of the main fire by winds
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vwildfire - an unwanted fire that requires measures of control.
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vfiring pattern - the specific pattern and timing of ignition of a prescribed fire to affect the direction or rate of fire spread and fire intensity.