EXPERIMENTAL MEASUREMENTS OF ATMOSPHERIC NEUTRINOS

This talk reports the latest indications of an anomaly in the measurem ents of atmospheric neutrinos. New results from Soudan-2 and Super-Kam iokande provide evidence that the ratio of nu(mu) to nu(e) interaction s is not as expected. High energy Super-Kamiokande data indicates the cause is a deficit of upward-going nu(mu), and the zenith angle depend ence of the effect is consistent with neutrino oscillations. Upward-go ing muon measurements by several detectors are discussed, but in total . they provide inconclusive evidence for the anomaly.