PHIVOLCS Bulletin Update for Bulusan Volcano - 11 December 2017. - PH Trending

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Monday, 11 December 2017

PHIVOLCS Bulletin Update for Bulusan Volcano - 11 December 2017.

http://www.phivolcs.dost.gov.ph

As of 11 December 2017 - Alert Level 1 (abnormal) status remains in effect over Bulusan Volcano.

Bulusan Volcano’s seismic monitoring network did not detect any 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.

DOST-PHIVOLCS Warning Update:

  1. 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. 
  2. 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. 
  3. 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.

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