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High-Resolution Aeromagnetic Survey of the Skykomish Area, Washington


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Blakely, R.J., and Sherrod, B.L. and Weaver, C.S., 2020, High-Resolution Aeromagnetic Survey of the Skykomish Area, Washington: U.S. Geological Survey data release,


This data release provides access to a low-altitude, aeromagnetic survey of a part of north-central Washington. The survey is centered approximately 120 km northwest of Yakima and includes the small town of Skykomish. The Skykomish aeromagnetic survey covers a part of the central Cascade Range of Washington, the western portion of the Jurassic ophiolitic Ingalls tectonic complex, and the Cretaceous Mount Stuart batholith. These data were acquired during the summer of 2010 by Goldak Airborne Surveys working under contract to the U.S. Geological Survey. Total magnetic field values were acquired using a fixed-wing aircraft flown at a target elevation of 150 m above terrain and along flight lines and tie lines spaced 400 m and 4000 m apart, [...]


Attached Files

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“Gridded data (gxf)”
3.61 MB
“Survey report (pdf)”
2.13 MB
“Data dictionary (pdf)”
16.16 KB
“Database (csv)”
251.35 MB
“Survey location map (jpg)”
thumbnail 783.6 KB


These data were acquired to support earthquake hazard investigations and geologic mapping in north-central Washington. The survey is near the epicenter of the 1872 Chelan earthquake and ongoing seismic activity surrounding Entiat, Washington. Initial interpretation of these data is presented in Blakely, R.J., Sherrod, B.L., Wells, R.E., and Weaver, C.S., 2012, Peeking below Columbia River flood basalts with high-resolution aeromagnetic data: implications for central Washington earthquake hazards [abstract]: Fall Meeting of the American Geophysical Union, San Francisco, California, December 3-7, 2012.

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DOI doi:10.5066/P9P1YDQH

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