``Explosion'' and Intensification of Magnetic Flux Tubes
A magnetic flux tube anchored at the bottom of the solar convection zone and rising toward the surface as a result of an undulatory instability can be affected by a sudden catastrophic expansion and weakening of the magnetic field at its apex if the original field strength is below a few times 104 G. Such an "explosion" occurs if the flux tube
Moreno-Insertis, F. et al.
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10
1995