Located in … Metro Manila (CNN Philippines, May 5) — The Philippine Institute of Volcanology and Seismology (Phivolcs) has raised alert level 1 over Mount Bulusan in Sorsogon due to an "increase in seismic activity." Bulusan was first raised in July 17 and 6 respectively. Mayon and Mt. From May 4 to 5, Phivolcs has recorded a total of 16 volcanic earthquakes, according to the agency’s Bulusan Volcano Bulletin on Sunday. SORSOGON, Philippines— The Philippine Institute of Volcanology and Seismology (Phivolcs) on Sunday (May 5) raised Alert Level 1 over Mount Bulusan due to increased seismic activity. Mount Bulusan is a stratovolcano, a cone-shaped volcano which has one or several summit craters. The Philippine Institute of Volcanology and Seismology (Phivolcs) has raised the alert on Mount Bulusan in Sorsogon to level 1. It has a base diameter of 15 kilometers (km). Kanlaon have also been in Alert Level 1 since March. State volcanologists raised yesterday the alert level at Mount Bulusan in Sorsogon from 0 (normal) to 1 (abnormal), following another steam-driven explosion the other night. The three-and-half minute explosion occurred at 9:46 p.m. on Wednesday, according to the Philippine Institute of Volcanology and Seismology (Phivolcs). Bulusan is home to the highest peak in Sorsogon, Mount Bulusan. Bulusan. This after the volcano showed abnormal activities, based on the number of volcanic earthquakes recorded in the past days. ALERT LEVEL 1 Mt. Based on the information released by PHIVOLCS on July 17, the Alert Level 1 status of the Mt. Bulusan. Table 2. This means the volcano is in an abnormal state and may cause "steam-driven eruptions" due to hydrothermal volcanic activity. From May 4 to 5, Phivolcs has recorded a total of 16 volcanic earthquakes, according to the agency’s Bulusan Volcano Bulletin on Sunday. SORSOGON, Philippines— The Philippine Institute of Volcanology and Seismology (Phivolcs) on Sunday (May 5) raised Alert Level 1 over Mount Bulusan due to increased seismic activity. SORSOGON, Philippines— The Philippine Institute of Volcanology and Seismology (Phivolcs) on Sunday (May 5) raised Alert Level 1 over Mount Bulusan due to increased seismic activity. Alert Level I (Abnormal) remained hoisted over Mount Bulusan, meaning the volcano continues to show signs of abnormal conditions. File photo: Mt. At the foot of the mountain is the equally popular Bulusan Lake , a scenic crater lake surrounded by a dense green forest and encircled by a concrete pathway. Taal and Mt. Bulusan. Table 1. Alert levels for Mount Pinatubo, May 13, 1991. Bulusan in Sorsogon province has been showing signs of restiveness, prompting the Philippine Institute of Volcanology and Seismology to raise alert level … When asked if there are plans to raise the alert status due to the intense signs being shown by the volcano, Dominguiano said there is no scientific basis to raise the volcano’s alert status. Mt. The alert levels were based on instrumentally derived data and daily visual observations. This active volcano is the centerpiece of Bulusan Volcano Natural Park which covers a land area of 3,672 hectares . PHIVOLCS have been releasing bulletins for the status of the four volcanoes daily, via their social media handles. From May 4 to 5, Phivolcs has recorded a total of 16 volcanic earthquakes, according to the agency’s Bulusan Volcano Bulletin The original scheme of alert levels that was released on May 13, 1991, is shown in table 1. Alert levels and danger zones issued on Mount Pinatubo, 1991­92 (PHIVOLCS, variously dated). Mt. 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