Is this heel striking?

Question

http://img386.imageshack.us/img386/9468/heelstrikeaf1.jpg

if it is how can change it to make it better?

Answer 1

It appears to be heel striking, to stop landing on your heels shorten your stride so you do not land in front of your body, but more under your body.

Running is a pushing action, not a pulling action.

Try to land mostly flat footed, and as your body passes over the foot lengthen the stride by extending your leg behind  you.

Never reach out in front to lengthen your stride.

Answer 2

Your picture is too small, please resize it. If it is the back foot, no, it is not.