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Federal
Worldwide Instantaneous Values of Geomagnetic Components D, H, and Z or X, Y, and Z at 2.5-minute Intervals from 1964 to 1974
National Oceanic and Atmospheric Administration, Department of Commerce —
This data file is comprised of instantaneous values of the geomagnetic components D, H, and Z or X, Y, and Z at 2.5-minute intervals. These values were derived from... -
Federal
Geomagnetic Absolute Mean Values at Hourly Intervals from 220 Observatories Worldwide
National Oceanic and Atmospheric Administration, Department of Commerce —
This file is comprised of absolute mean hourly values of the geomagnetic components D, H and Z or X, Y and Z. These values, on magnetic tape, are available from... -
Federal
Values for the 15-minute Index of Geomagnetic Activity at High Latitude Stations (Geomagnetic Latitude 58 Degrees)
National Oceanic and Atmospheric Administration, Department of Commerce —
The NOAA National Centers for Environmental Information (formerly National Geophysical Data Center) receives, on a monthly basis, Q indices from Sodankyla. These data... -
Federal
Air Force Geophysics Laboratory Magnetometer Network
National Oceanic and Atmospheric Administration, Department of Commerce —
This file is comprised of the variation one minute values of the geomagnetic components X, Y and Z. These data were calculated by the Air Force Geophysics Laboratory... -
Federal
AA Geomagnetic Activity Indices From Two Antipodal Observatories in Australia and England
National Oceanic and Atmospheric Administration, Department of Commerce —
The NOAA National Centers for Environmental Information (formerly National Geophysical Data Center) receives, on a monthly basis, indices that are based on the data... -
Federal
Geomagnetic aa Indices
National Oceanic and Atmospheric Administration, Department of Commerce —
The geomagnetic aa indices are the continuation of the series beginning in the year 1868. A full description of these indices is given in the International... -
Federal
Values About Ancient Magnetic Poles, Declination, Inclination, and Intensity, That Can Be Used to Track the Magnetic Pole and Continent Movements
National Oceanic and Atmospheric Administration, Department of Commerce —
The study of magnetism is one of the oldest of the geophysical sciences. It is unique among the sciences in that ancient records of the geomagnetic field are... -
Federal
Worldwide Database of Analog Marine Seismics, Bathymetry, Magnetics, and Gravity Data
National Oceanic and Atmospheric Administration, Department of Commerce —
The Analog Marine Geophysical Underway data file consists primarily of seismic data and some bathymetry, magnetics, and gravity data. Most of the data are released to... -
Federal
Crustal Ages of the Ocean Floor - Poster
National Oceanic and Atmospheric Administration, Department of Commerce —
The Crustal Ages of the Ocean Floor Poster was created at NGDC using the Crustal Ages of the Ocean Floor database draped digitally over a relief of the ocean floor... -
Federal
Worldwide Well Logs with Values of Conductivity, Bulk Density, Porosity, Grain Density, Resistivity, and Sonic Ratio Collected by the Ocean Drilling Program (ODP)
National Oceanic and Atmospheric Administration, Department of Commerce —
World-wide digital well log data collected for the Ocean Drilling Program (ODP) by Schlumberger Offshore Services under contract to Texas A&M University. The data... -
Federal
K Indices of Magnetic Activity Relative to an assumed Quiet-day for each 3-Hour Period
National Oceanic and Atmospheric Administration, Department of Commerce —
The NOAA National Centers for Environmental Information (formerly National Geophysical Data Center) receives the K indices on a current basis from approximately 85...