Magma activity inside Taal continues as Phivolcs records 18 tremors in one dayChristian Fernsby ▼ | February 5, 2020
Eighteen harmonic tremors, or prolonged shaking, were recorded in the past day around Taal volcano, the Philippine Institute of Volcanology and Seismology (Phivolcs) said today.
Volcano in the Philippines Taal volcano
According to United States Geological Survey (USGS), a harmonic tremor is a “continuous rhythmic earthquake that often accompanies volcanic eruptions.” It is a long-duration release of seismic energy that indicates underground movement of magma.
“These earthquakes signify magmatic activity beneath the Taal edifice that could lead to eruptive activity at the main crater,” Phivolcs said. ■