Aeromagnetic Map of Northeastern California

First posted August 22, 2023 For additional information, contact: Geology, Minerals, Energy, & Geophysics Science CenterU.S. Geological SurveyBuilding 19, 350 N. Akron Rd.P.O. Box 158Moffett Field, CA 94035 Aeromagnetic surveys were conducted to improve understanding of the geology and structure in northeastern California, a region predominantly covered by Quaternary Tertiary, mainly Neogene, volcanic rocks including Medicine Lake volcano. New aeromagnetic data are substantial improvement over existing reveal structural details not resolved older surveys. Here we show how these (1) do support presence northwest-striking feature across Modoc Plateau, (2) northeast-striking fault-bounded block reversely magnetized material that may influence tectonism at volcano, (3) constrain possible right-lateral offsets along Likely Fault Zone other faults traverse region. The also highlight extensions mapped faults, such as those Fall River Valley Tule Lower Klamath areas.