The results of the magneto-seismology of propagating transverse waves. The top left panel shows the coronal loop as observed in 10 747 Å line centroid wavelength at 18:43 UT, with the measured propagation speeds of the transverse waves shown in the top right panel. The white contour over the intensity image shows the region in 10 798 Å that has adequate signal level. The lower left panel displays the estimates of plasma density from the 10 798 Å/10 747 Å ratio and the right hand panel shows the magnetic field estimate.