Coolant is leaking behind alternator

Chevy blazer 96yr, coolant is squirting up from slightly behind alternator. What could be the cause? And is there a quick fix for a regular guy?

I had used stop leak for coolant systems and it worked for about 3 months. But it doen't seem to be doing anything now, and I was going to try head gasket and intake coolant stop leak but was afraid of doing more harm than good.