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National Geomagnetism Program
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<h2 id="history">History</h2> <ul><li>1840–1845 Magnetic <a href="/facts/Observatory/y0FVg7vS">observatories</a> at <a href="/facts/Harvard_College_Observatory/VaeaI4U6">Harvard</a> and <a href="/facts/Girard_College/PtuEpbx7">Girard College</a></li> <li>1860 Coast Survey begins regular magnetic observations at Maine's <a href="/facts/Fort_Sullivan_(Maine)/njhteFc3">Fort Sullivan</a>, Tift's Observatory in Florida and others</li> <li>1882–1883 First <a href="/facts/International_Polar_Year/WeHy51ja">International Polar Year</a></li> <li>1901–1956 <a href="/facts/United_States_Coast_and_Geodetic_Survey/8XhGwogo">United States Coast and Geodetic Survey</a> operates Cheltenham Magnetic Observatory in Maryland</li> <li>1905–1918 USC&GS <a href="/facts/USC%26GS_Explorer_(1904)/RvKQrmNz"><i>Explorer</i></a> performs magnetic surveys</li> <li>1909 <i>Carnegie</i> wooden survey ship built for <a href="/facts/Carnegie_Institution_for_Science/zS5MqNUP">Carnegie Institution for Science</a> begins seven cruises to measure the <a href="/facts/Earth%27s_magnetic_field/73G36wmx">Earth's magnetic field</a></li> <li>1932–1933 Second <a href="/facts/International_Polar_Year/WeHy51ja">International Polar Year</a></li> <li>1956 Fredericksburg Magnetic Observatory in Virginia replaces Cheltenham<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a></li> <li>1957–1958 <a href="/facts/International_Geophysical_Year/m2HSX6Y6">International Geophysical Year</a></li> <li>1961 <a href="/facts/Boulder_Geomagnetic_Observatory/bohf9Und">Boulder Geomagnetic Observatory</a>, Colorado</li> <li>1973 NOAA/USC&GS geomagnetism program transferred to the USGS</li> <li>1979–1980 <a href="/facts/Explorer_61/5Y8hEsuK">Magsat satellite</a> survey from orbit</li> <li>1994 U.S. National <a href="/facts/Space_Weather_Prediction_Center/LVcA59n3">Space Weather</a> Program (NSWP), an interagency collaboration<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a></li></ul> <h2 id="see-also">See also</h2> <p><a href="/facts/History_of_geomagnetism/lK0BJLoo">History of geomagnetism</a> </p> <h2 id="external-links">External links</h2> <ul><li><a href="https://geomag.usgs.gov">Official site</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>USGS Geomagnetism Program FDSN <a href="https://www.fdsn.org/networks/detail/NT/" target="_blank">https://www.fdsn.org/networks/detail/NT/</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Nelson, James H. (1962) Magnetism of the Earth C&GS Pub 40-1 p38 <a href="https://books.google.com/books?id=MnMZ5dPGSBcC&pg=PA38" target="_blank">https://books.google.com/books?id=MnMZ5dPGSBcC&pg=PA38</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Love, Jeffrey J. & Finn, Carol A. (2011) The USGS Geomagnetism Program and Its Role in Space Weather Monitoring AGU Space Weather Volume 9, Issue 7 <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2011SW000684" target="_blank">https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2011SW000684</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> </ol>