Ash fall from Huaynaputina reached a thickness of within a area of southern Peru, Bolivia and Chile; the tephra was emplaced in a major westerly lobe and a minor northerly lobe, which is an unusual distribution as tephra from volcanoes in the Central Andes is usually carried eastward by winds. The deposition of the tephra was influenced by topography and wind changes during the eruption, which led to changes in the fallout pattern. The ash deposits from the eruption are visible to this day, and several archeological sites are preserved under them.