THEMIS Update and a Review of the Science Behind Magnetometer Signatures
By Laura Peticolas

2. Outline

3. Satellites Update

4. Ground-based Update

5. Earth’s magnetic fields

6. Magnetic Field Strength

7. Coordinate Systems

8. Geomagnetic (GEONS)

9. Compass-type (HDZ)

10. The GEONS Data

11. Earth’s Magnetic Field

12. Different Latitudes

13. Magnetosphere

14. Magnetosphere currents

15. Solar Wind (SW)

16. Effects of Ring Current on the Mag Data

17. Auroral Currents

18. Magnetic signatures of auroral substorms

19. Kp Index

20. Kp Index = 1

21. Kp Index = 7

22. Space Weather Effects

23. Storm and Substorms

24. THEMIS will determine which competing model is correct

25. Daytime (Sq) Currents

26. Ionosphere Effects

Geomagnetic (GEONS)
The geomagnetic coordinate
system describes the way the
magnetic field is pointing by
Ř X: the strength of the magnetic field
in the direction of Earth’s magnetic
north pole
Ř Y: the strength of the magnetic field
in the magnetic east direction (90
deg from X and toward east)
Ř Z: the strength of the magnetic field
pointing down (90 deg from both X
and Y – right hand rule!)
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