9:30 AM - 11:30 AM ▲ [20a-PB2-5] Semi quantitative Elemental Analysis of Volcanic Ashes from Populations Surrounding the Tungurahua Volcano of the Eruptive Period 2008-2010, Using the LIBS Spectroscopy (Laser-Induced Breakdown Spectroscopy) 〇(BC)Geovanna Elizabeth Vasquez, Cesar Costa