2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/38307We present updated results of the measurement of upward-going muons produced by neutrino interactions in the rock below the MACRO detector. These data support MACRO's previously published results. They favor a neutrino oscillation explanation of the atmospheric neutrino anomaly.4 pages 3 figures to appear in the proceedings of XVIII 26th International Cosmic Ray Conference (ICRC 99), Salt Lake City, UT, 17-25 Aug 1999High Energy Physics - Experimenttext