BACOLOD CITY, NEGROS OCCIDENTAL, Philippines — Crater glow, or “banaag,” observed with the naked eye at Kanlaon Volcano on Sunday evening may indicate an impending magmatic eruption, a Philippine Institute of Volcanology and Seismology (Phivolcs) official warned. “We are not taking any chances because at Mayon Volcano before it erupted, there was also a crater
