| Abstract: | When regional geomagnetic charts for areas roughly the size of the US were compiled by hand, some large local anomalies were displayed in the isomagnetic lines. Since the late 1960s, when the compilation of charts using computers and mathematical models was started, most of the details available in the hand drawn regional charts have been lost. One exception to this is the Canadian magnetic declination chart for 1980. This chart was constructed using a 180 degrees spherical harmonic model. -from Author |
| Genre: | Article |
| ProdID: | 70014158 |
| Citation Author: | Alldredge, L. R. |
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| Citation End Page: | 738 |
| Citation Issue: | 12 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geomagnetism & Geoelectricity |
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| Citation Number Of Pages: | 16 |
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| Citation Search Results Text: | On regional geomagnetic charts; 1987; Article; Journal; Journal of Geomagnetism & Geoelectricity; Alldredge, L. R. |
| Citation Start Page: | 723 |
| Citation Volume: | 39 |
| Citation Year: | 1987 |
| Type: | citation/reference |
| Text: | On regional geomagnetic charts; 1987; Article; Journal; Journal of Geomagnetism & Geoelectricity; Alldredge, L. R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1987 00:00 -0600 |
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