Um, I don't think so.
First, it's incredibly hot and her dress is very close to the Lava. Second, there are all kinds of gasses around there that would make it very hard to breathe.
Finally, I think this picture is probably photoshop. The light on them is way too even. There's no shadow. The color balance between the couple and the rest of the scene seems to be off. There's no hint of red light from the lava on her wedding dress (we should see it on her ass). The groom is barefoot on what is probably hot rocks. They are standing on an impossibly flat piece of rock.