Growth of the tearing mode around the current sheet plane. We show data at t = 14.3 min, where (a) represents the evolution of the B_z component (perpendicular to the current sheet, B_z was initially zero, with no magnetic field perturbation along the z direction), (b) plasma pressure in the x − z plane (at y = 0), and (c) the variation in the plasma pressure along the vertical dashed green line in figure (b).