using a compass in the Rocky Mountains Montana what would the declination be west of true or east, unaffected?

Answer 1

Magnetic declination is the angle between the direction to the earth's rotational axis and the magnetic north pole. In North America, both of these points are in the same direction (or a zero declination) in an approximate north-south line running just west of the Great Lakes roughly following the Mississippi River. Because the earth's north rotational axis is north of the magnetic north pole (by "true" direction), all points lying west of that line have an "east" or "positive" declination, and points to the east have a "west" or "negative" declination.

Montana would have an east declination, ie, the magnetic compass would point east of true north, so the correction is to the west. The declination in Montana ranges from 10° to 17° east, depending on what part of the Big Sky state you are in.

The declination in all of Montana is to the east of true north.

Answer 2

Yes...especially if you are near a ferromagnetic deposit in the crust. Magnetic declination also changes as one gets further away from the zero isogonic line...which at present is a line that runs almost parallel to the Mississippi river and is in that vicinity of the North American continent. Geologist are constantly having to adjust their magnetic compasses to accomodate the Earth's isogonic pattern. With the constant migration of the Earth's magnetic poles, topographic maps and aircraft magnetic compasses must always be adjusted.

Answer 3

West

Answer 4

Another CHEAP attempt to answer the Marboro Challenge Questions!!

Answer 5

east of true

Answer 6

you guys are cheaters. If you don't know the answers you don't deserve to go. and just you never mind how I found your question...........