CEBU CITY, Philippines — Ashfall generated by a three-minute moderate eruption of Kanlaon Volcano on Negros Island halted flight operations at Mactan-Cebu International Airport (MCIA), some 90 kilometers away. In a public advisory, the MCIA management said that as of 3:50 p.m. on Thursday, some 23 flights had been canceled. Of the 23 flights, 19