QCOSTARICA - The Rincón de la Vieja volcano had at least 4 eruptions between Saturday and Sunday, as reported by the Observatorio Vulcanológico y Sismológico de la Universidad Nacional (OVSICORI-UNA) - Volcanological and Seismological Observatory of the National University. Four eruptions were registered between Friday and Saturday, one of them at 10:48 pm Saturday, was…