Beginning of activity in 67P/Churyumov-Gerasimenko and predictions for 2014–2015 C. Snodgrass, C. Tubiana, D. M. Bramich, K. Meech, H. Boehnhardt and L. Barrera A&A, 557 (2013) A33 Published online: 20 August 2013 DOI: 10.1051/0004-6361/201322020