QUITO, Ecuador (AP) - Two volcanoes that have been menacing Ecuador for months could erupt violently if they continue accumulating energy that is not released through steam and ash, the nation's Geophysical Institute warned Tuesday. Both the Pichincha volcano near this capital city, and the Tungurahua volcano, in Ecuador's central Andes, have been in an active eruptive process for weeks, scientists say. They now are in stages of relative calm, Geophysical Institute director Hugo Yepez said. He warned unless they can release built up energy with smaller discharges, large eruptions were possible. The experts have forecast major eruptions at different times in the last two months, but so far their predictions have not materialized.