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

 
MAYON VOLCANO BULLETIN 20 October 2017 8:00 A.M. PDF Print
Friday, 20 October 2017 07:53

Mayon Volcano’s seismic monitoring network recorded one (1) volcanic earthquake during the past 24 hours. Weak to moderate emission of white steam plumes that drifted northeast and east-northeast was observed. Sulfur dioxide (SO2) emission was measured at an average of 441 tonnes/day on Oct 17, 2017. Precise leveling data obtained on September 16-21, 2017 indicated slight inflation of the edifice relative to May 2017 survey. Continuous GPS and tiltmeter measurements also indicate inflationary trend since July 2016. Sulfur dioxide (SO2) emission was measured at an average of 441 tonnes/day on October 17, 2017.

Alert Level 1 remains in effect over Mayon Volcano, 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.

 
DAP AWARDS “CENTER OF EXCELLENCE ON PUBLIC SECTOR PRODUCTIVITY” TO DOST-PHIVOLCS PDF Print
Thursday, 07 September 2017 17:16

 

The Valley Fault System (VFS) Atlas and the PHIVOLCS FaultFinder, two of the Department of Science and Technology – Philippine Institute of Volcanology and Seismology (DOST-PHIVOLCS) initiatives, has been recognized by the Development Academy of the Philippines (DAP), the Asian Productivity Organization's designated Center of Excellence on Public Sector Productivity, under the categories of Innovation and Productivity Initiatives: e-Government Leadership and Innovation Leadership.

The VFS Atlas and the PHIVOLCS FaultFinder were designed to give the public accurate information on the location of active faults and to aid the stakeholders in their land-use planning, risk assessments, disaster management and other activities related to earthquake effects mitigation and preparedness.

 

Launched on 18 May 2015, the VFS Atlas is a handbook of large scale maps showing in detail areas traversed by the Valley Fault System, an active fault in the eastern part of the Greater Metro Manila Area (GMMA). The atlas was a result of PHIVOLCS' review of the VFS as one of the component activities of the AusAid-funded GMMA Ready Project under the United Nations Development Programme (UNDP) and implemented by member agencies of the National Disaster Risk Reduction and Management Council back in 2012. The VFS Atlas makes information readily available to different stakeholders inquiring about areas transected by the VFS.

Scientists at work. Geologists from DOST-PHIVOLCS at the trench site in Carmona, Cavite.

 

PHIVOLCS Fault Finder is a web and android application capable to do proximity searches to active faults. It may be used to determine the location of Active Faults in an area and to measure the shortest distance between an active fault and a user's current location, which is determined by the gadget's tracking device. It may also be used to measure the shortest distance between an active fault and a specific site, which is identified by a user.

This app is a product of the joint collaboration between the DOST-PHIVOLCS, Geological Survey of Japan (GSJ), National Institute of Advanced Industrial Science and Technology (AIST), Japan. It was developed by Dr. Joel C. Bandibas of GSJ with the cooperation of the research and development personnel of DOST-PHIVOLCS.

1,000 printed copies of VFS Atlas were handed out to local government units, national government agencies, and other stakeholders. As of June 2017, 1,611 of the digital copies of the Atlas were distributed in CDs, while 107,036 were downloaded online. Requests for ground rupture hazard assessment as well as lectures for earthquakes and earthquake hazards also increased dramatically following the release of the Atlas.

More than 170,000 users from around the world have visited the FaultFinder site since its launch in July 2016. In the Philippines, majority of its users have searched for information about the Valley Fault System.

 

DOST-PHIVOLCS distributes a CD containing a digital copy of the VFS Atlas for free. Stakeholders can also download a copy online from DOST-PHIVOLCS official website (www.phivolcs.dost.gov.ph).  Go to http://faultfinder.phivolcs.dost.gov.ph or download the app using your android phones to find active fault nearest you.

 
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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