Volcanic earthquakes were detected overnight from seismic networks of Taal Volcano and Mayon Volcano on Tuesday, the National Disaster Risk Reduction and Management Council (NDRRMC) said in an advisory.
Two volcanic quakes were recorded within a 24-hour period stemming from Mayon Volcano in Albay, while one volcanic earthquake was traced back to Taal Volcano in Luzon.
“Mayon Volcano remains at abnormal condition,” NDRRMC warned.
The public was also cautioned against entering the six-kilometer radius around Mayon called the Permanent Danger Zone due to “perennial life-threatening dangers.”
Such threats include rockfalls, avalanches at the middle to upper slope, sudden ash puffs and steam-driven or phreatic eruptions from the summit.
Hazardous eruption of the active Taal Volcano, meanwhile, is not imminent, but the bureau said the main crater, which has been a tourist destination, is strictly off-limits.
NDRRMC said sudden steam explosions may occur and high concentrations of toxic gases may accumulate.
The northern portion of Taal’s main crater rim near Daang Kastila Trail may also be hazardous to tourists as steam emission blowing from fissures is expected to increase.
Authorities are closely monitoring the volcanoes’ activities. via The Philippine Star