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Philippine Institute of Volcanology and Seismology
Taal Volcano Bulletin 19 June 2013 8:00 A.M. PDF Print
Wednesday, 19 June 2013 07:42

Taal Volcano’s (14.0000°N, 120.9833°E) seismic network recorded one (1) volcanic earthquake during the past 24-hour observation period. Field measurements last 13 June 2013 at the western sector of the Main Crater Lake yielded a slight decrease in water temperature of 32.5°C from 33.2°C, increase in water level of 0.25 meter from 0.24 meter, and water acidity remained at pH 3.03.  Ground deformation survey in the Volcano Island on 23 May-01 June 2013 denoted slight deflation at Calauit, Alas-as, Pira-piraso, Daang Kastila and New Eruption Site precise leveling lines compared to the February 2013 survey.  However, GPS data for the period of October 2012 to first week of May 2013 show inflationary changes in ground deformation while the edifice is still slightly inflating in general compared to February 2011 baseline data. Carbon dioxide (CO2) emission at the Main Crater Lake increased to 947 tonnes per day on 03 March 2013 compared to 720 tonnes per day last 27 November 2012.

Alert Level 1 remains in effect over Taal Volcano. This means that hazardous eruption is not imminent. The public, however, is reminded that the Main Crater should be strictly off-limits because sudden steam explosions may occur and high concentrations of toxic gases may accumulate. The northern portion of the Main Crater rim, in the vicinity of Daang Kastila Trail, may also become hazardous when steam emission along existing fissures suddenly increases.  Furthermore, the public is also reminded that the entire Volcano Island is a Permanent Danger Zone (PDZ), and permanent settlement in the island is strongly not recommended.

DOST-PHIVOLCS

 
BULUSAN VOLCANO BULLETIN 29 April 2017 8:00 A.M. PDF Print
Saturday, 29 April 2017 07:10

Bulusan Volcano’s seismic monitoring network recorded one (1) volcanic earthquake during the past 24 hours.  Weak emission of white steam plumes that rose up to 70 meters and drifted southeast was observed coming from the active vents. Sulfur dioxide (SO2) emission was measured at an average of 11 tonnes per day on March 17, 2017. Precise leveling data obtained on January 29, 2017 - February 03, 2017 indicated deflationary changes since October 2016. This is consistent with data from continuous GPS measurements that indicated short-term deflation of the edifice since January 2017. However, the edifice remains generally inflated with respect to July 2016 based on continuous GPS data.

Alert Level 1 (abnormal) status remains in effect over Bulusan Volcano, which means that it is currently in a state of unrest probably driven by hydrothermal processes that could generate steam driven or phreatic eruptions. Local government units and the public are reminded that entry into the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited and that vigilance in the Extended Danger Zone (EDZ) must be exercised due to the increased possibilities of sudden and hazardous phreatic eruptions. Civil aviation authorities must also advise pilots to avoid flying close to the volcano’s summit as ash from any sudden phreatic eruption can be hazardous to aircraft. Furthermore, people living within valleys and along river/stream channels especially on the southeast, southwest and northwest sector of the edifice should be vigilant against sediment-laden stream flows and lahars in the event of heavy and prolonged rainfall. DOST-PHIVOLCS is closely monitoring Bulusan Volcano’s condition and any new development will be communicated to all concerned stakeholders.

DOST-PHIVOLCS

 
BULUSAN VOLCANO BULLETIN 26 April 2018 08:00 A.M. PDF Print
Thursday, 26 April 2018 07:48

Bulusan Volcano’s seismic monitoring network did not detect any volcanic earthquake during the past 24 hours. Weak emission of white steam plumes that rose 50 meters from the summit before drifting southwest and west-southwest was observed. Precise leveling data obtained on 19 February-01 March 2018 indicated a slight deflation of the edifice. However, pronounced inflation of the upper slopes that began on 28 December 2017 is still being recorded by electronic tiltmeter, consistent with the latest GPS results. Overall ground deformation data indicate that the edifice is still swollen or inflated relative to July 2016.

Alert Level 1 (abnormal) status remains in effect over Bulusan Volcano, which means that it is currently in a state of unrest probably driven by hydrothermal processes that could generate steam driven or phreatic eruptions. Local government units and the public are reminded that entry into the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited and that vigilance in the Extended Danger Zone (EDZ) must be exercised due to the increased possibilities of sudden and hazardous phreatic eruptions. Civil aviation authorities must also advise pilots to avoid flying close to the volcano’s summit as ash from any sudden phreatic eruption can be hazardous to aircraft. Furthermore, people living within valleys and along river/stream channels especially on the southeast, southwest and northwest sector of the edifice should be vigilant against sediment-laden stream flows and lahars in the event of heavy and prolonged rainfall. DOST-PHIVOLCS is closely monitoring Bulusan Volcano’s condition and any new development will be communicated to all concerned stakeholders.

 
PRESS RELEASE: DOST-PHIVOLCS TO CONDUCT TRAINING FOR HIGH SCHOOL TEACHERS IN ORMOC CITY PDF Print
Monday, 23 April 2018 15:31

The Department of Science and Technology - Philippine Institute of Volcanology and Seismology (DOST-PHIVOLCS) will conduct a three-day “Teachers’ Training on Communicating Earthquake, Tsunami and Volcanic Hazards” for high school teachers of Ormoc City on April 24-26, 2018 at Pongos Hotel, Ormoc City, Leyte.

Through a series of lectures and applied workshop, DOST-PHIVOLCS aims to train teachers on basic information about the science of volcano, earthquake, tsunami and its hazards, preparedness and how to communicate these information to their students.

DOST-PHIVOLCS awareness and preparedness program intends to equip school children with the right information to prepare, respond and protect oneself during volcanic eruption, earthquake and tsunami since children are vulnerable to the dangers brought by these occurrences.

The three-day training is normally offered to selected public high school teachers only. This time however, selected Science teachers and school disaster risk reduction focal person/coordinator from 26 high schools, both public and private, in Ormoc City are expected to participate on this training in coordination with the Department of Education (DepEd) and the local government of Ormoc City.

The province of Leyte is transected and bounded by active earthquake generators and therefore, large-magnitude earthquakes have occurred in the area. A magnitude 6.5 earthquake struck the province last 6 July 2017. The epicenter is located 15.5 km northeast of Ormoc City, Leyte. The earthquake was generated by the movement of Leyte Segment of the Philippine Fault.

Earlier this year, DOST-PHIVOLCS inaugurated the reconstructed Palo Seismic Station damaged by Typhoon Yolanda in Palo, Leyte. This earthquake monitoring station has and will significantly benefit the Province of Leyte through increased detectability of events and more accurate and timely determination of earthquake parameters of events generated by active earthquake sources in and around the province.

 

For information about the event, please contact:

Dr. Renato U. Solidum, Jr.

Undersecretary for Disaster Risk Reduction and Climate Change, DOST

and Officer-in-Charge, PHIVOLCS

(632) 926-2611

 

[Download PRESS RELEASE Here]

 
MAYON VOLCANO BULLETIN 19 June 2013 8:00 A.M. PDF Print
Wednesday, 19 June 2013 07:43

Mayon Volcano’s (13.2500°N, 123.6833°E) seismic network did not detect any volcanic earthquake during the past 24-hour observation period. Steaming activity was not observed due to thick clouds covering the summit crater. No crater glow was observed last night. Sulfur dioxide (SO2) emission on 14 June 2013 was measured at an average of 133 tonnes/day. Ground deformation survey (precise levelling) on the third week of May 2013 showed slight inflation of the edifice compared to February 2012, with the volcano still slightly inflated compared to January 2010 baselines.

Mayon Volcano’s alert status remains at Alert Level 1, which means that it is at abnormal condition.  Although this means that presently no magmatic eruption is imminent, it is strongly advised that the public refrain from entering the 6-kilometer radius Permanent Danger Zone (PDZ) due to the perennial life-threatening dangers of rockfalls, landslides/avalanches at the middle to upper slope, sudden ash puffs and steam-driven or phreatic eruptions from the summit. Active stream/river channels and those identified as perennially lahar-prone areas on all sectors of the volcano should also be avoided especially during extreme weather conditions when there is heavy and prolonged rainfall. DOST-PHIVOLCS maintains its close monitoring of Mayon Volcano and any new development will be communicated to all concerned stakeholders.

DOST-PHIVOLCS

 
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