Teoloyucan Magnetic Observatory
Satellite imagery: Esri, Maxar, Earthstar Geographics
Teoloyucan Magnetic Observatory, in the State of Mexico, is the country's only geomagnetic observatory, quietly recording Earth's magnetic field around the clock since 1914.
About Teoloyucan Magnetic Observatory
Run by the Magnetic Service of UNAM's Geophysics Institute, the observatory measures the geomagnetic field's D, H, and Z components, sampling every five seconds and integrating readings into one-minute values. It is part of INTERMAGNET, a worldwide network of over 100 geomagnetic observatories, and maintains continuous baseline calibration to keep its data to a high standard.
History
The observatory has operated in Teoloyucan since August 1914. Before that, its predecessor ran in Mexico City from 1879 to 1912, but was relocated after electromagnetic interference from the growing city made accurate readings impossible.
Location & getting there
Teoloyucan sits in the State of Mexico, near Mexico City, a location chosen originally to escape the capital's electromagnetic noise.
Visiting Teoloyucan Magnetic Observatory
As a specialised research facility monitoring Earth's magnetic field rather than a public viewing site, Teoloyucan Magnetic Observatory does not advertise general visiting hours. Check with UNAM's Geophysics Institute for any current access arrangements.
See your named star from here
Teoloyucan Magnetic Observatory studies the Earth's own field rather than the night sky, so it isn't set up to point a telescope at anything. If you're hoping to see a star named through Star Register, take its coordinates to a dedicated astronomical observatory near you, or use our star packages and catalogue to explore it from home.
Opening hours and public-visit programs vary by season. Check the official website and Google Maps for current times before you travel.



