Taal Volcano has been exhibiting unstable behavior in the past seven days, with the volcano logging more than 103 earthquakes on Saturday but only seven quakes on Sunday, according to the Philippine Institute of Volcanology and Seismology (Phivolcs),
The agency also noted some anomalies happening to the landmass of Taal Volcano Island (TVI).
Based on the monitoring of Phivolcs on the volcano, a total of 103 volcanic quakes were recorded on Saturday (October 30), 85 on Friday (October 29), 91 on Thursday (October 28), 51 on Wednesday (October 27), 57 on Tuesday (October 26), 28 on Monday (October 25), and 46 on Sunday last week (October 24).
However, on Sunday over a 24-hours period, Phivolcs recorded only seven volcanic quakes.
“In the past 24-hour period, the Taal Volcano Network recorded seven volcanic earthquakes, including one volcanic tremor event having duration of two minutes, six low-frequency volcanic earthquakes and low-level background tremor that has persisted since 7 July 2021,” Phivolcs said in its latest bulletin on Taal issued on Sunday morning.
The agency has also maintained Alert Level 2, indicating “Increased Unrest” over the TVI area.
This means that “sudden steam- or gas-driven explosions, volcanic earthquakes, minor ashfall, and lethal accumulations or expulsions of volcanic gas can occur and threaten areas within and around TVI,” according to Phivolcs.
Phivolcs also noted some anomalies happening to the landmass of Taal Volcano Island.
“Based on ground deformation parameters from electronic tilt, continuous GPS and InSAR monitoring, Taal Volcano Island has begun inflating in August 2021 while the Taal region continues to undergo very slow extension since 2020,” the agency said.