Geoscience Reference
In-Depth Information
a
E, V/cm
10
5
1
×
10
4
1
×
10
3
1
×
100
10
1
0.1
0.01
1
×
10
−
3
0
50
100
h, km
b
Fig. 5.16
Field of polarization (
a
) and its relationship to critical value (
b
). Minutes of time after
the lightning discharge are specified in the table.
Curves
are numbered
connecting the “cloud” with the ground. Three-dimensional (3D) calculations of the
electromagnetic field were carried out with the help of the standard code.
In Fig.
5.19
is shown the dependence of the lightning current magnetic field on
time in the point located at the altitude of 1 km, at the distance of 1 km from the
lightning channel. The maximum of the magnetic field corresponds to the maximum
