Magnetic lines of the Earth - magnetic dip angle bigger than naively expected - Page 1
Forum section: electronics / general

author: CatalinaWOW
author_rank: Super Contributor
timestamp: January 05, 2019, 04:19:28 pm
content: Didn't watch the video, but anyone who paid attention in a good physics class would know that the field of the earth is 3D, and is only parallel to the earths surface near the equator.Image using a compass in Newfoundland or in Alaska. Both far north with strong vertical components. And very different results due to the details of earths magnetic field.

author: RoGeorge
author_rank: Super Contributor
timestamp: January 05, 2019, 05:11:39 pm
content: The surprise was that the angle is much bigger than I was expecting, because the magnetic core is much smaller than the whole Earth. Also the tilt distribution is far from being uniform:

author: GeoffreyF
author_rank: Regular Contributor
timestamp: January 05, 2019, 05:17:58 pm
content: Quote from: RoGeorge on January 05, 2019, 05:11:39 pmIt's only a surprise because you formed an expectation without bothering to read the subject. Your post is still pointlessly lacking in any effort at education. I also suggest that you read up on how distortions occur with different types of map projection.

author: RoGeorge
author_rank: Super Contributor
timestamp: January 05, 2019, 05:46:47 pm
content: Well, it seems thatmagnetic lines tilted downward up to 30 degrees at the Equatoris common knowledge for everyone but me.

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: January 05, 2019, 06:14:37 pm
content: Quote from: RoGeorge on January 05, 2019, 05:46:47 pmUnderstanding magnetic deviation+variation is basic component to all pilot training and quite evident, especially if you are a bush pilot in Canda's north or Alaska.

author: Gyro
author_rank: Super Contributor
timestamp: January 05, 2019, 06:27:09 pm
content: This seems like a perfect opportunity for whoever it is around here, who has is location set to Antarctica, to pitch in a demo.

author: raptor1956
author_rank: Frequent Contributor
timestamp: January 05, 2019, 06:41:20 pm
content: Correct me if I'm wrong, but wouldn't there need to be a pretty much equal number of lines exiting the Earth as there is entering the Earth. The magnetic poles are not coincident with the axis of rotation which complicates things a bit and the makeup of the Earth is not consistent with variations in the distribution of iron and other ferromagnetic materials.Brian

author: duak
author_rank: Super Contributor
timestamp: January 05, 2019, 07:24:25 pm
content: Fun fact: it's called magnetic inclination or dip:https://en.wikipedia.org/wiki/Magnetic_dipMore than you might want to read about the field:https://en.wikipedia.org/wiki/Earth%27s_magnetic_fieldIn a book on the Hubble Space Telescope there was a reference to the South Atlantic Anomaly where it's computer would crash & then go into safe mode:https://en.wikipedia.org/wiki/South_Atlantic_Anomaly

author: RoGeorge
author_rank: Super Contributor
timestamp: January 05, 2019, 07:47:29 pm
content: Thank you. Title changed to include the proper term: magnetic dip.

author: cs.dk
author_rank: Unknown
timestamp: January 05, 2019, 08:49:47 pm
content: Quote from: Gyro on January 05, 2019, 06:27:09 pm

author: CatalinaWOW
author_rank: Super Contributor
timestamp: January 05, 2019, 09:38:17 pm
content: Given the accelerating rate and direction of motion of the magnetic north pole there could be a new thread started:"The Russians are stealing the North Pole"