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Geomagnetism Canada

Earth's magnetic field, magnetic data, plots, calculators and Canadian observatories

Services and information

Magnetic calculators

Magnetic declination calculator, magnetic field calculator

Magnetic plots

Geomagnetic and geoelectric field, rate of change, summary plots

Magnetic data

Access magnetic data and indices

Magnetic observatories

Information about Canadian magnetic observatories

Earth's magnetic field

Learn about geomagnetic field, generation, components, declination, secular variation, how to use a compass

Space weather

Find information about space weather conditions, access data and services, learn about space weather.

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The Earth's magnetic field (or geomagnetic field) is an ever-changing phenomenon that influences human activity and the natural world in a myriad of ways. The geomagnetic field changes from place to place, and on time scales ranging from seconds to decades to eons. These changes can affect health and safety, and economic well-being. The geomagnetic field, along with its associated phenomena, can both assist and degrade navigation and surveying techniques; it can impede geophysical exploration; it can disrupt electric power utilities, and pipeline operations; and it can influence modern communications systems, spacecraft, and more.

This web site and its companion website (Space Weather Canada) describe the work of the Canadian Hazard Information Service and the Public Safety Geoscience Program in monitoring and predicting the changes in the geomagnetic field throughout Canada.

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