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 13 December 2017 08:00 A.M. PDF Print
Wednesday, 13 December 2017 08:11

Bulusan Volcano’s seismic monitoring network recorded one (1) volcanic earthquake during the past 24 hours. Degassing at the active vents could not be observed due to thick clouds covering the summit. Precise leveling data obtained on November 20 – 29, 2017 indicated a slight deflation of the edifice, consistent with short-term deflationary trends in both tilt and continuous GPS data in the last quarter of 2017. However, the edifice remains slightly inflated since 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.

 
PHIVOLCS Conducts REDAS Training for General Mariano Alvarez, Cavite PDF Print
Monday, 20 November 2017 09:55

PHIVOLCS conducted a six-day training entitled “Mainstreaming Disaster Risk Reduction into the Local Development Planning Process, Contingency Planning and Emergency Preparedness through the Provision and Use of the REDAS Software" last September 18 - 23, 2017 for General Mariano Alvarez, Cavite. The training was held at Monte Vista Hotsprings & Conference Center, Brgy. Pansol, Calamba City. The goal of the training was to provide and familiarize the participants with the capability of the REDAS Software, especially the modules which are designed to be used for impact assessment.

There was a total of 19 participants during the training: MDRRMO (2), MPDC (2), MEO (2), Assessor's Office (1), ICT Office (2), Barangay Officials (4), DILG (1), BFP (1), Mayor's Office (1), Sangguniang Bayan Office (1), and guests from IBM Phils (2). The participants were provided with REDAS version 2.9d.  A total of 21 REDAS software license keys was issued during the said event.

Group Picture of REDAS General Mariano Alvarez Participants

The first day of the training covered the introduction and installation of the REDAS Software, basic features of REDAS, and lecture on basic map reading. The succeeding days of the training covered lectures ranging from Earthquake and Volcanic Hazards, Building Risk Database, Earthquake Risk Assessment, the use of SQLite as a Relational and Spatial Database System, and Seismic Hazard Assessment. The two new REDAS impact modules Severe Wind Impact Forecasting Tool (SWIFT) and Flood Loss Assessment Tool (FLOAT) were also taught in the training. In addition, software such as Exposure Database Module (EDM), SQLite and Quantum GIS, and the EDM and MyTracks in Android devices were also taught during the training. The participants were taught how to use the EDM in Android Devices for conducting building survey. Different earthquake risk assessment methodologies and computations were also taught in the training, as well as identifying building earthquake damage levels for conducting earthquake risk assessment.

PHIVOLCS Deputy Director Bartolome Bautista giving a lecture on  Earthquake and Tsunami Alerting Module

The participants showed enthusiasm during the duration of the training. According to them, the tool will be able to help them determine the possible impacts from given earthquake scenarios. The convenience of the EDM for Android Devices was also a big help for them to prepare and plan accordingly by developing their own building exposure database.

Speakers and facilitators during the training were Bartolome C. Bautista, Maria Leonila P. Bautista, Ishmael C. Narag, Angelito G. Lanuza, Jayvie H. Nadua, Dave Andrei V. Rivera, Johnlery P. Deximo, Emmanuel D. Mitiam, Mary Ann T. Montion, Roschele G. Ablan, Lawrence Aaron C. Bañes, Clint Drexel M. Ongue, Joana C. Umbaña, and Chayserie A. Moises.  The PHIVOLCS Team was also joined by Sharon Juliet M. Arruejo, Bernard R. Punzalan II, both from PAGASA as well as  Nilo Lemuel J. Dolojan and Byron V. Baldivicio, both from MGB.

 
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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