(Eagle News) — The Philippine Institute of Volcanology and Seismology has downgraded Mayon’s alert status to “normal” following a “continued decline in all monitoring parameters.” PHIVOLCS said, for instance, the frequency of volcanic earthquakes has declined to baseline levels (0-5 events/day) for the last six months. Data from Global Positioning Systems (GPS) and campaign Electronic Distance Measurement (EDM) and Precise Leveling (PL) also showed a “slight and decreasing rate of inflation of the Mayon edifice […]