Some Results of an Archaeomagnetic Study on the Secular Variation in the Southwest of North America

抄録

Some preliminary data on secular variations of the geomagnetic field are given for the time 600 to 1500 A. D. as determined by archaeomagnetic methods. The inclination of the field has varied from a low of approximately 40 degrees to a maximum of some 60 degrees. Values of declination vary approximately from 10 degrees east of true north to 15 degrees west.