File photo of Taal Volcano. 鈥擨NQUIRER/GRIG C. MONTEGRANDE
LUCENA CITY 鈥� After four days of calmness, Taal Volcano in Batangas province recorded five tremors over the last 24 hours, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported on Wednesday, May 29.
In its bulletin, the state volcanologist said the volcanic tremors lasted two to 13 minutes.
Volcanic tremors are 鈥渃ontinuous seismic signals with regular or irregular sine wave appearance and low frequencies.鈥�
The volcano has been calm and without earthquakes since May 24.
搁贰础顿:听Phivolcs Taal Volcano update: 8 volcanic quakes in 24 hours
The last sign of unrest around the volcano was on May 23 when the Phivolcs detected three earthquakes accompanied by a volcanic tremor that lasted six minutes.
The state seismologist defined volcanic earthquakes as those that come from an active volcano and are distinguished by their 鈥渕ode of arrivals, periods, amplitudes, etc.鈥�
In its latest update, Phivolcs reported the emission of 3,164 metric tons (MT) of sulfur dioxide, which rose 900 meters tall on Tuesday, May 28.
However, despite the 鈥渕oderate emission,鈥� the state volcanologist still observed an 鈥渦pwelling of hot volcanic fluids in the Main Crater Lake鈥� of Taal Volcano Island (TVI), locally known as 鈥淧ulo,鈥� which sits in the middle of Taal Lake.
Taal Volcano is still under alert level 1 (low level of volcanic unrest), Phivolcs said.
The agency reminded the public that Taal Volcano remained in an 鈥渁bnormal condition鈥� and 鈥渟hould not be interpreted to have ceased unrest nor ceased the threat of eruptive activity.鈥�