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Links to related web resources go to NOAA's Space Weather Now DoD World Magnetic Model Home Links and descriptions of magnetic field models and software go to the Geomagnetic Data Home go to all data and information Answers to Frequently Asked Questions Go to the Space Physics Interactive Data Resource Geomagnetic Data online at NGDC

Geomagnetic Hourly Mean Data

Plot of geomagnetic hourly mean values

Selected files of geomagnetic hourly mean values are available for download via FTP.

The hourly files are a combination of an ASCII header and binary data. To generate an ASCII file use software hvupack.exe available in the subdirectory or download and unzip access software available in software subdirectory. ASCII format is file hourly.doc.

To access the latest hourly values available online, visit SPIDR.

The image to the left shows SPIDR's data visualization of hourly data from the Leirvogur magnetic observatory for October 2002.