Specific Origin Area (SOA)

  • The smaller area within the general origin area where the fire's direction of spread was first influenced by fuel, weather, and/or topography. Source: Guide to Wildland Fire Origin and Cause Determination, PMS 412.
    • Definition Extension: The SOA will contain the Ignition Area. Generally this area is characterized by subtle and microscale fire pattern indicators as a result of less intense burning associated with the initial stages of the fire.
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