What he said....
From your site:
Dr. Kosovichev is a VERY, very nice person, but he in NO WAY endorses my views about there being a "solid" surface on the sun. In a recent email from Dr. Kosovichev, he explained these features in the following quote:
"The consistent structures in the movie are caused by stationary flows in magnetic structures, sunspots and active regions.
We know this from the simultaneous measurements of solar magnetic field, made by SOHO. These are not solid structures which would not have mass flows that we see.
These images are Doppler shift of the spectral line Ni 6768A.
The Doppler shift measures the velocity of mass motions along the line of sight. The darker areas show the motions towards us, and light areas show flows from us. These are not cliffs or anything like this. The movie frames are the running differences of the Doppler shift. For the illustration purpose, the sunquake signal is enhanced by increasing its amplitude by a factor 4."