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.


PHIVOLCS Conducts REDAS Training for Iloilo Province PDF Print
Friday, 06 November 2015 13:54

The training entitled “Mainstreaming Disaster Risk Reduction into the Local Development Planning Process, Contingency Planning and Emergency Preparedness through the Use of the REDAS Software for the Province of Iloilo” was conducted by PHIVOLCS last October 25-30, 2015 in Iloilo City. This training was supported by the Hazard Mapping and Assessment for Effective Community-Based Disaster Risk Management (READY) Project funded by the United Nations Development Programme (UNDP) and Australian Agency for International Development (AusAID).

There was a total of 65 participants from 33 Iloilo municipalities of Ajuy, Anilao, Badiangan, Balasan, Banate, Barotac Viejo, Batad, Bingawan, Cabatuan, Calinog, Carles, Concepcion, Dueñas, Dumangas, Guimbal, Igbaras, Janiuay, Lambunao, Leganes, Lemery, Leon, Maasin, Mina, New Lucena, Oton, Pototan, San Joaquin, San Rafael, Santa Barbara, Sara, Tigbauan, Tubungan and Zarraga including Iloilo City and from the Provincial Government of Iloilo.  Guest participants came from NEDA VI, HLURB VI, OCD VI, PDRRMO-Capiz and PDRRMO-Aklan. The participants were composed of Disaster Managers, Planning Officers, Engineers, IT specialists and others. A total of 62 license keys was issued during the said training. 
The first day of the training served for the introduction of PHIVOLCS, speakers and facilitators, REDAS software, and the Earthquake and Tsunami Alerting Tool (ETAM). In addition, installation of the softwares Exposure Database Module (EDM), Sqlite and Quantum GIS, ETAM and the EDM and MyTracks in android devices was conducted. The following days of the training served for lectures where the participants were taught how to build their own risk database, to determine the maximum credible earthquake in their area, and to conduct earthquake risk assessment, among others.

Iloilo PDRRMC Executive Director Jerry Bionat gave the welcoming and closing remarks for the training. Dr. Bartolome C. Bautista also gave his message during the closing ceremony, along with impressions from representatives of Igbaras and Carles municipalities and the province ICT Office. The speakers and facilitators in the training were Bartolome C. Bautista, Maria Leonila P. Bautista, Winchelle Ian Sevilla, Rhommel N. Grutas, Raymond P. Maximo, Ruffy R. Villanueva, Dave Andrei V. Rivera,  Greggue Ann Lyza T. Castro, Paula Grace V. Baylon, Ramil B. Atando and Jo Arlu Sabar, all from PHIVOLCS, and Robert Z. Quinto from PAGASA.

Photos show exposure database collection survey using GPS, laptops and android devices:

Tuesday, 12 April 2016 15:52

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) handed over new Bohol hazard maps to the local government last April 4, 2016 at the Conference Room of Governor’s Mansion in Tagbilaran City, Bohol.

PHIVOLCS hand over Bohol hazard maps

A press conference, InfoSentro sa PHIVOLCS, was held and Dr. Renato U. Solidum, Jr., PHIVOLCS Director, gave an update regarding the new earthquake monitoring stations located in Bohol and nearby areas, and what has been done by PHIVOLCS after the 2013 Bohol Earthquake.

During the press conference, Dr. Solidum said that the residents of Bohol can be rest assured that no more large earthquake would occur generated by the North Bohol Fault. However, he also talked about the possibility of a large earthquake occurring in Bohol generated by the East Bohol Fault and encouraged everyone to prepare for the said possibility.

Dr. Solidum talked about the multi-hazard mapping and re-assessment and validation of previous hazard maps in Bohol conducted by PHIVOLCS staff and presented the updated hazard maps for earthquake-induced landslide, earthshaking, ground rupture, liquefaction, and tsunami. The hazard maps should be use as basis for disaster prevention, mitigation, preparedness and response plans of the local government.

Mr. Anthony Damalerio, Provincial Disaster Risk Reduction and Mitigation (PDRRM) Officer, received the hazard maps and said that they would use the maps in their disaster preparedness and rescue plans.

Bohol Governor Edgar Chatto held a meeting with Dr. Solidum and other PHIVOLCS staff to discuss the hazard maps handed over to the province of Bohol and a possibility of putting up an earthquake museum in the province.

The island of Bohol experienced a Magnitude 7.2 earthquake last October 15, 2013. The earthquake was generated by the reverse fault movement of North Bohol Fault and had caused damages in different municipalities. PHIVOLCS had been conducting, multi-hazard mapping and re-assessment and validation of previous hazard maps in Bohol. Updated hazard maps for earthquake-induced landslide, earthshaking, ground rupture, liquefaction, and tsunami are now available.

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MAYON VOLCANO BULLETIN 28 November 2015 8:00 A.M. PDF Print
Saturday, 28 November 2015 08:19

Mayon Volcano’s seismic monitoring recorded did not detect any volcanic earthquake during the past 24 hours. Weak to moderate emission of white steam plumes that drifted towards west-southwest was observed. Crater glow was not observed last night due to thick rain clouds covering the summit. Precise leveling survey results from August 25-30, 2015 indicated very slight deflation of the edifice relative to July 2015, consistent with short-term deflation recorded by continuous GPS since August 2015 and electronic tilt since March 2015.

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.

Friday, 06 May 2016 07:34

Bulusan Volcano’s seismic monitoring network recorded six (6) volcanic earthquakes during the past 24 hours. Wispy to weak emission of white steam plumes that rose up to 50m and drifted west-southwest was observed coming from the active vents. Precise leveling survey results from April 27 to May 5, 2016 indicated slight deflationary changes of the edifice relative to February 2016, consistent with the measurements from continuous GPS data as of 30 April 2016.

Alert Level 1 (abnormal) remains in effect over Bulusan Volcano. This indicates that hydrothermal processes are underway beneath the volcano that may lead to steam-driven eruptions. The local government units and the public are reminded that entry into the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the possibility of sudden and hazardous steam-driven or 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 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 relayed to all concerned.

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