Taal Volcano is on Alert No. 2

The Philippine Institute of Volcanology and Seismology (Phivolcs) has raised its alert level from level 1 to 2 for Taal Volcano, following observations of “anomalous change.”
In a statement posted in its website , Philvolcs said “alert Level 2″ means the volcano is “undergoing magmatic intrusion which could eventually lead to an eruption.”
Philvolcs reminded the public that the main crater remains off-limits because hazardous steam-driven explosions may occur, along with the possible build-up of toxic gases.
Continued rise in number of recorded volcanic earthquakes, among other unusual volcano behavior, prompted Phivolcs to raise the alert level.
“For the past 24 hours, 32 high frequency volcanic earthquakes were detected. The size of recorded earthquakes has also been increasing. In addition, a low frequency type volcanic earthquake was detected on 02 June 2010,” Philvolcs added.
Philvolcs said temperature of the main crater lake also increased to 34 degrees Centrigade on May 24, relatively higher by 2 to 3 degress C from its temperature last May 11.
“The composition of Main Crater Lake water has shown above normal values of Mg/Cl, SO4/Cl and Total Dissolved Solids,” Philvolcs also said.
It also noted that steaming activities at the northern and northeast sides of the crater “occasionally intensified.” Philvolcs also noted there were “audible hissing sounds.”
“The recorded high frequency volcanic earthquakes could be the result of active rock fracturing associated with magma intrusion beneath the volcano. The fractures served as passageways through which hot gases from the intruding magma could escape into the Main Crater Lake,” Phivolcs said.

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