Philippine Institute of Volcanology and Seismology
MAYON VOLCANO BULLETIN 11 December 2013 8:00 A.M. PDF Print
Tuesday, 10 December 2013 23:08

Mayon Volcano’s (13.2500°N, 123.6833°E) seismic network did not detect any volcanic earthquake during the past 24-hour observation period. Moderate emission of white steam plumes drifting west-southwest was observed. No crater glow was observed last night. Sulfur dioxide (SO2) emission on 23 November 2013 was measured at an average of 211 tonnes/day. Ground deformation survey (precise leveling) on the 2nd week of November 2013 showed slight deflation of the edifice compared to August 2013 survey, 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.

 
PHIVOLCS builds info portal for quakes and volcanoes PDF Print
Tuesday, 16 September 2014 04:12

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) introduced the” Information Portal for Philippine Earthquake and Volcano” during a seminar-forum on Sept. 15, 2014 at the institute’s auditorium, Quezon City. Led by its Director, Renato U. Solidum, Jr., the heads of the 4 technical divisions gave brief descriptions on the content of the portal.

Following a series of joint meetings with partner-agencies Japan International Cooperation Agency-Japan Science and Technology Agency (JICA-JST) and National Research Institute for Earth Science and Disaster Prevention (NIED), PHIVOLCS has come up with a prototype of the Information Portal for Philippine Earthquake and Volcano which will be available for public viewing in the near future.

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Taal Volcano Bulletin 19 June 2013 8:00 A.M. PDF Print
Tuesday, 18 June 2013 23:42

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

 
TAAL VOLCANO BULLETIN 18 September 2014 8:00 A.M PDF Print
Wednesday, 17 September 2014 23:31

Taal Volcano’s (14.0000N, 120.9833E) seismic network recorded one (1) volcanic earthquake during the past 24 hours. Field measurements conducted on 11 September 2014 at the western sector of the Main Crater Lake recorded a slight decrease in water temperature from 32.8°C to 32.7°C; an increase in water level from 0.82 meter to 0.95 meter; and decrease in acidity from pH 3.00 to 3.12. Ground deformation measurements through precise leveling surveys on August 28 to September 5, 2014 showed slight inflationary changes compared to June 2014 result. Ground deformation measurements from GPS data for July 2014 relative to May 2014 also showed an inflationary change. In general, the edifice is slightly inflated compared to February 2011 baseline data. Carbon dioxide (CO2) emission at the Main Crater Lake increased from 698 tonnes/day in June 2014 to 1800 tonnes/day in the July 23-25, 2014 survey.

 

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.

 
MAYON VOLCANO BULLETIN 19 June 2013 8:00 A.M. PDF Print
Tuesday, 18 June 2013 23:43

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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