
TY  - JOUR
A1  - Bond, FR 
A1  - Jacka, F 
T1  - Distribution of Auroras in the Southern Hemisphere. II. Nightly Probability of Overhead Aurora
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1962
VL  - 15
IS  - 2
SP  - 261
EP  - 272
KW  - 
UR  - https://doi.org/10.1071/PH620261 
N2  - The probability P of overhead occurrence of aurora during a night is estimated for 22 southern hemisphere stations during the I.G.Y. The distribution of probability of occurrence is represented in terms of three measures of colatitude: 81 is defined in terms of the eccentric dipole representation of the geomagnetic field; 82 is defined in terms of projections from circles in the equatorial plane, along the geomagnetic lines of force, onto the Earth; 83 is defined in terms of the integral invariant f; (I-F IF m)!dl of charged particle motion in the geomagnetic field. 
ER  -

