Boulder Magnetic Observatory
type: Dataset
description: These data are vector and scalar component values of the Earth's magnetic field for 2004 recorded at the Boulder Magnetic Observatory in Colorado. Vector values are measured using 3 mutually orthogonal fluxgate magnetometer sensors. The scalar value of the total magnetic field is recorded with a proton precession magnetometer. All values are calibrated with measurements of the absolute value of the geomagnetic field using a DI-Flux magnetometer. The data are numerically filtered to prevent aliasing, and quality controlled during processing. Longer period values of the field, including hourly, daily, monthly, and annual means are derived from the 1-minute data.
keyword: amerigeo
keyword: amerigeoss
keyword: ckan
keyword: earth-science
keyword: geo
keyword: geomagnetic-indices
keyword: geomagnetism
keyword: geoss
keyword: magnetic-declination
keyword: magnetic-field
keyword: magnetic-inclination
keyword: magnetic-intensity
keyword: national
keyword: north-america
keyword: solid-earth
keyword: united-states
issued: 2025-11-20T13:12:30.375500
modified: 2025-11-20T13:12:30.375504
spatial: Location
  geometry: POINT (-105.2400 49.8600)

US Migrating
type: Agent

National Geomagnetism Program
type: Distribution
description: Monitoring of the Earth's magnetic field for research and practical applications.
access URL: http://geomag.usgs.gov
issued: 2020-11-12T06:47:19.912733
modified: 2025-11-20T13:12:30.366392