UPDATE ON ATMOSPHERIC NEUTRINOS - ART. NO. 033004

We discuss the impact of recent experimental results on the determinat ion of atmospheric neutrino oscillation parameters. We use all publish ed results on atmospheric neutrinos, including the preliminary large s tatistics data of Super-Kamiokande. We reanalyze the data in terms of both nu(mu) --> nu(tau) and nu(mu) --> nu(e) channels using new improv ed calculations of the atmospheric neutrino flux. We compare the sensi tivity attained in atmospheric neutrino experiments with those of acce lerator and reactor neutrino oscillation searches, including the recen t CHOOZ experiment. We briefly comment on the implications of atmosphe ric neutrino data in relation to future searches for neutrino oscillat ions with long baselines, such as the K2K, MINOS, ICARUS, and NOE expe riments. [S0556-2821(98)02215-2]