harmonic

Credit to Author: Franz Lewin Embudo| Date: Thu, 06 Feb 2020 03:41:52 +0000

THE Philippine Institute of Volcanology and Seismology (Phivolcs) on Thursday said 11 harmonic tremors, or prolonged shaking, were recorded over the past 24 hours. Phivolcs said in its 8 a.m. bulletin that the Taal Volcano Network registered 132 volcanic earthquakes, including 3 low-frequency events and 11 harmonic tremors that lasted 2 to 3 minutes. A […]