In the summer of 1990, the USGS, Rice University, the GSC, and IRIS/PASSCAL jointly conducted a seismic experiment across the Brooks Range, Arctic Alaska. The goal of the experiment was to produce a high-resolution image of the crust and upper mantle of the Brooks Range and flanking geologic provinces by combining refraction and reflection techniques.
EarthScope Consortium operates the NSF National Geophysical Facility (NSF NGF).
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