2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46560The most popular solutions of the solar neutrino problem which assume massive neutrinos predict varying with time signals in the solar neutrino detectors. The variations represent a distinctive feature of these solutions and do not depend on the theoretically predicted total flux of neutrinos from the Sun. The sensitivity of SuperKamiokande and SNO to day-night variations due to regeneration in the Earth is estimated.4 pages, 2 figures, LATEX, uses sprocl.sty (included) talk presented at the DPF '96 meeting, Minneapolis, MN, August 10 - 15, 1996High Energy Physics - PhenomenologyAstrophysicstext