Magnetometer

Carbon60 · Post by **Carbon60** » Thu Jul 19, 2012 9:14 pm

Not sure where to post this one. Is there a magnetometer section on this site?

Given the awful weather here in the UK I've almost given up all hope of seeing the sun again this summer. However, not willing to miss out on the action, I've taken to measuring Earth's magnetic declination local to my home in the North West of England using a home made fluxgate magnetometer connected to my PC. Last weekend was a real treat when the CME from AR1520 struck Earth's magnetosphere. The attached image is a three-day recording of the impact event showing clearly the transient waves and ripples in the magnetic field created by the event.

More to come as we approach solar max!

keithatrochdale · Post by **keithatrochdale** » Thu Jul 19, 2012 9:23 pm

How about sharing some pictures and description of your home made gear?

Post by **marktownley** » Thu Jul 19, 2012 9:31 pm

This is cool Stu! Yes, more info please!

colinsk · Post by **colinsk** » Fri Jul 20, 2012 1:18 am

Too cool!

What are the units of measure for the x axis?

Carbon60 · Post by **Carbon60** » Fri Jul 20, 2012 6:12 am

Cheers guys.

Happy to provide more info. I'll put something together over the next few days.

Colin, the units are essentially nT, but it is not precisely calibrated, which is something I'm working on. I'm using Lancaster University's magnetometer data on SAMNET as a reference point, calibrating my readings against theirs.

Cheers

Stu.

Post by **solarchat** » Fri Jul 20, 2012 1:59 pm

Forgive my ignorance Carbon, Ive renamed this conference accordingly...

Carbon60 · Post by **Carbon60** » Tue Jul 24, 2012 7:42 pm

Many thanks Stephen.

More to follow. Just doing a bit of a write up on my set-up, which I hope to complete later this week, time permitting.

Regards

Stu.

colinsk · Post by **colinsk** » Wed Jul 25, 2012 1:15 am

Cheers guys.

Happy to provide more info. I'll put something together over the next few days.

Colin, the units are essentially nT, but it is not precisely calibrated, which is something I'm working on. I'm using Lancaster University's magnetometer data on SAMNET as a reference point, calibrating my readings against theirs.

Cheers

Stu.

I am still lost.

To me nT would be index of refraction times time.

:thanx:

Spectral Joe · Post by **Spectral Joe** » Wed Jul 25, 2012 1:35 am

Nanotesla

Carbon60 · Post by **Carbon60** » Wed Jul 25, 2012 9:50 am

Sorry Colin, yes, Nano-Tesla.

http://perso.infonie.be/j.g.delannoy/BA ... nology.pdf

For anyone interested, here is a great intorductory article from 2005 by W.Bayot. Lots of useful information and background.

Stu.

colinsk · Post by **colinsk** » Thu Jul 26, 2012 5:13 am

Just to get a feel for this, what would be a change in magnetic declination during a very large magnetic storm?

Carbon60 · Post by **Carbon60** » Fri Sep 21, 2012 8:11 am

Hi Colin,

Sorry, I must have missed this one.

The declination angle is very small, even with a quite strong magnetic storm. We're really only speaking of fractions of a degree on a compass needle generally; more for really large (and rare) storms. There's quite a lot written on the web about this type of thing and there are several descriptions of basic optical magnetometers which will give you an idea of how small the rotation angle is.

Hope this helps.

Stu.

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