Characterizing current structures in 3D hybrid-kinetic simulations of plasma turbulence M. Sisti, S. Fadanelli, S. S. Cerri, M. Faganello, F. Califano and O. Agullo A&A, 655 (2021) A107 Published online: 29 November 2021 DOI: 10.1051/0004-6361/202141902