How Safe is My House?

How Safe is My House?
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Philippine Institute of Volcanology and Seismology
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.


PHIVOLCS Participates in the PacWave15 PDF Print
Friday, 06 February 2015 08:47

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) joined the Exercise Pacific Wave 2015 (PacWave15) on 03-06 February 2015. PacWave15 aims to test the new Operational Pacific Tsunami Warning Center (PTWC) Enhanced Products of the Pacific Tsunami Warning Service (PTWS).  It simulated Pacific countries, of which, the Philippines is a member, receiving Tsunami Information with the earthquake parameters, forecasted tsunami height and arrival time.

For the Philippines, two scenarios were used. First, a M9.0 earthquake from off the coast of Peru generating a distant tsunami that will reach the eastern coast of the country in 22 hours with tsunami heights of 0.3m to 1.0m above the tide level. Secondly, a M8.6 earthquake from the Manila Trench generating a local tsunami that will affect the west Philippine coast within few minutes. The warning information was used to test the current PHIVOLCS Tsunami Standard Operating Procedures in assessing the tsunami threat in the country, and issuing timely as well as accurate information for early action.

06 February 2015

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.


MAYON VOLCANO BULLETIN 29 March 2015 8:00 A.M. PDF Print
Saturday, 28 March 2015 23:04

Mayon Volcano’s seismic monitoring network did not detect any volcanic earthquake during the past 24 hours. Weak emission of white steam plumes that crept downslope and drifted toward northwest and west-southwest was observed. No crater glow was observed last night. Sulfur dioxide (SO2) emitted at the crater averaged 134 tonnes/day last 24 February 2015, which is below the baseline level during normal periods. Precise leveling surveys on March 17 to 26, 2015 indicated slight inflation of the edifice relative to February 17 to March 5, 2015 surveys, consistent with short-term inflation recorded by continuous GPS. The above ground deformation data suggest that the edifice is still swelling at very slow rate possibly due to slight movements of previously stalled magma. 

Mayon Volcano’s alert status is currently at Alert Level 2. This means the volcano is at a moderate level of magmatic unrest. Although the volcano is currently exhibiting low-level of seismic activity, ground deformation data indicate that eruptible magma had already accumulated the previous year beneath the edifice. Current conditions may still change and eventually lead to hazardous eruption. The public is still reminded to avoid entry into the 6-km Permanent Danger Zone or PDZ due to perennial hazards of rockfalls, avalanche, ash puffs and sudden steam-driven or phreatic eruptions at the summit area. Furthermore, people living in valleys and active river channels are cautioned to remain vigilant against sediment-laden streamflows and lahars in the event of prolonged and heavy rainfall. PHIVOLCS-DOST is closely monitoring Mayon Volcano’s activity and any new development will be immediately posted to all concerned.

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.

This output was accomplished through the concerted effort of the agencies involved under the JST-JICA-SATREPS Project “Enhancement of Earthquake and Volcano Monitoring and Effective Utilization of Disaster Mitigation Information in the Philippines” which was implemented in 2010.

This information portal was designed based on various components: a) Real-time earthquake monitoring, b) Evaluation of Earthquake Generation Potential, c) Integrated Real-Time Volcano Monitoring and d) Provision of Disaster Mitigation and Promotion of Utilization.

PHIVOLCS divisions’ chiefs presented progress of projects under the four components, citing the recently-launched “How Safe is Your House, a 12-point-do-it-yourself questionnaire” as one of the main contents that can be viewed on the portal site.

They also showed the information materials developed for public consumption and the enhancement of the systems used for monitoring earthquakes and volcanoes.PHIVOLCS assured the participants during the open forum that they will improve the portal site by organizing the contents and making it comprehensive and interactive for better public access.

Activities and outputs under the project, including published technical papers, have been presented  in a number of conferences since 2011.

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