Image 1 Caption: "An animation of a half-wave dipole antenna (a stardard radio antenna) emitting radio waves (radio band fiducial range 3 Hz -- 300 GHz = 0.3 THz, 0.1 cm -- 10**5 km
Features:
In fact, the electric field
and magnetic field have
values at all points in
spacetime, but
in animations
and diagrams only
a representative sample of
field lines
can be shown of course.
In Image 2, the sample of
magnetic fields
is rather skimpy.
In fact, the magnetic field lines
will be everywhere
perpendicular to
the electric field lines
and form circles
around the
antenna axis
(see
Wikipedia: Near and far field: Summary of regions and their interactions).