It appears the twitter user who posted the photo at the summit just before the eruption made it down safely but has protected his account/possibly deleted it.

I am hopeful, at least, because he has two kitties to go home to.

@setori_2 ???????? pic.twitter.com/G6qEmnp1i4

— ?? (@esP_526) September 28, 2014

setori ??????????????????setori_2???????????????????? 30?????????????????????????????????? ????????? ?????????? pic.twitter.com/5jQBWFjqDJ

— ????? (@TckTakhiko) September 28, 2014

His tweet says (roughly) “Thank you all for worrying, I made it down the mountain safely this morning. I am going to delete my account.”