• Organization: Department of the Interior
• Updated: 2020-09-29T00:00:00Z

The U.S. Geological Survey National Crustal Model (NCM) is being developed to include spatially varying estimates of site response in seismic hazard assessments. Primary outputs of the NCM are...

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• Organization: Department of the Interior
• Updated: 2020-09-29T00:00:00Z

We present a numeric grid containing estimates of the depth to the pre-Cenozoic basement for the western United States. Values for these grids were combined and integrated from previous studies or...

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• Organization: Department of the Interior
• Updated: 2025-09-03T00:00:00Z

Seismic hazard assessments depend on an accurate prediction of ground motion, which in turn depends on a base knowledge of three-dimensional variations in density, seismic velocity, and...

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• Organization: Department of the Interior
• Updated: 2025-09-03T00:00:00Z

We present a numeric grid containing estimates of the thickness of unconsolidated sediments for the western United States. Values for these grids were combined and integrated from previous studies...

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• Organization: Department of the Interior
• Updated: 2020-09-29T00:00:00Z

We present a petrologic and mineral physics database as part of the USGS National Crustal Model (NCM) for the western United States. Each of 209 geologic units, 134 of which are currently part of...

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• Organization: Department of the Interior
• Updated: 2025-09-03T00:00:00Z

A three-dimensional (3D) geologic framework of the conterminous United States is presented here as part of the U.S. Geological Survey National Crustal Model for Seismic Hazard Studies. The...

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• Organization: Department of the Interior
• Updated: 2025-09-03T00:00:00Z

A 3D temperature model is constructed in order to support the estimation of physical parameters within the USGS National Crustal Model. The crustal model is defined by a geological framework...

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• Organization: Department of the Interior
• Updated: 2025-06-09T00:00:00Z

This data release is composed of three crustal (as opposed to subduction zone) geologic input datasets for the 2023 Alaska update to the U.S. National Seismic Hazard Model (NSHM): 1) fault section...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2022-11-15T00:00:00.000+00:00

The High Definition Geomagnetic Model (HDGM) is a global, high resolution model of the Earth's geomagnetic main and crustal field, providing magnetic field values (total field, dip, and...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2019-11-15T00:00:00.000+00:00

The High Definition Geomagnetic Model (HDGM) is a global, high resolution model of the Earth's geomagnetic main and crustal field, providing magnetic field values (total field, dip, and...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2020-11-15T00:00:00.000+00:00

The High Definition Geomagnetic Model (HDGM) is a global, high resolution model of the Earth's geomagnetic main and crustal field, providing magnetic field values (total field, dip, and...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2024-12-06T00:00:00.000+00:00

The High Definition Geomagnetic Model (HDGM) is a global, high resolution model of the Earth's geomagnetic main and crustal field, providing magnetic field values (total field, dip, and...

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• Organization: Department of the Interior
• Updated: 2025-03-31T00:00:00Z

The Mohorovicic discontinuity or 'Moho' maps the boundary between the earth's crust and mantle and is defined by an abrupt change in seismic velocity due to changes in the density of rocks between...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2025-05-14T00:00:00.000+00:00

This dataset contains four companion digital models of the age, age uncertainty, spreading rates and spreading asymmetries of the world's ocean basins as geographic and Mercator grids with...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2015-11-17

These data support a published journal paper described as follows: A 14-week investigation during a warm and cold seasons was conducted to improve understanding of air pollution sources that...

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• Organization: Department of the Interior
• Updated: 2023-12-21T00:00:00Z

This Data Release contains version 3.0 of two related earthquake geology databases for use in the 2023 U.S. National Seismic Hazard Model. The databases are: 1) A fault sections database...

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• Organization: Department of the Interior
• Updated: 2022-07-28T00:00:00Z

Regional geophysical maps of the Great Basin, USA were generated from new and existing sources to support ongoing efforts to characterize geothermal resource potential in the western US. These...

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