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The information about the discovery by Abu Rayhan Biruni and Shen Kuo is doubtful or irrelevant. The
Abu Rayhan Biruni article mentions a dip angle, but that is the angle between the true horizon and astronomical horizon, and it is not related to the Earth's magnetic field. The
Shen Kuo article mentions magnetism, but not dip.
JonH (
talk)
14:17, 21 March 2010 (UTC)reply
Sign conventions
The sign conventions in
Magnetic dip#Explanation have changed so often that it gets confusing, and even I got it wrong in a recent revision. For the record,
this version is correct: "the north end of a compass needle will point downward in the northern hemisphere (positive dip) or upward in the southern hemisphere (negative dip). The range of dip is from +90 degrees (at the
North Magnetic Pole) to -90 degrees (at the
South Magnetic Pole)." RockMagnetist(
talk)16:24, 1 June 2019 (UTC)reply
This article is within the scope of the
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Talk:Magnetic dip is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use
geology resource. If you would like to participate, you can choose to edit this article, or visit the
project page for more information.GeologyWikipedia:WikiProject GeologyTemplate:WikiProject GeologyGeology articles
The information about the discovery by Abu Rayhan Biruni and Shen Kuo is doubtful or irrelevant. The
Abu Rayhan Biruni article mentions a dip angle, but that is the angle between the true horizon and astronomical horizon, and it is not related to the Earth's magnetic field. The
Shen Kuo article mentions magnetism, but not dip.
JonH (
talk)
14:17, 21 March 2010 (UTC)reply
Sign conventions
The sign conventions in
Magnetic dip#Explanation have changed so often that it gets confusing, and even I got it wrong in a recent revision. For the record,
this version is correct: "the north end of a compass needle will point downward in the northern hemisphere (positive dip) or upward in the southern hemisphere (negative dip). The range of dip is from +90 degrees (at the
North Magnetic Pole) to -90 degrees (at the
South Magnetic Pole)." RockMagnetist(
talk)16:24, 1 June 2019 (UTC)reply