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Following the detection of a $\sim$300 TeV neutrino potentially associatedwith the flaring blazar TXS 0506+056, an excess of neutrinos around itsposition in 2014-2015 was revealed by IceCube. However, its contemporaneousquiescence in $\gamma$-rays is challenging to interpret consistently.Meanwhile, the blazar PKS 0502+049, positioned within the neutrino localizationuncertainties, was seen to be flaring in $\gamma$-rays. We show that dense,line-emitting gas clouds that interact with its jet and induce cosmic rayacceleration and hadronuclear interaction can plausibly explain the 2014-2015neutrino flare.

High-energy neutrino flare from cloud-jet interaction in the blazar PKS 0502+049