Phreatic eruptions at Mayon volcano, Philippines

phreatic-eruptions-at-mayon-volcano-march-2019

Two phreatic eruption events were recorded at Mayon volcano, Philippines at 00:11 and 22:27 UTC on March 7, 2019. PHIVOLCS maintains Alert Level 2 over the volcano – moderate level of unrest.

Mayon volcano’s seismic monitoring network recorded 6 volcanic earthquakes and two 2 rockfall events during the 24-hour observation period, PHIVOLCS reported 08:00 local time today (00:00 UTC, March 8).

Two of these earthquakes were related to phreatic eruptions that generated 500- and 300-m (1 640 and 984 feet) high grayish ash plume from the summit before drifting southwest, respectively.

Moderate emission of white steam-laden plumes before drifting west-northwest, west-southwest and west was observed. Fair crater glow from the summit could be observed at night.

Sulfur dioxide (SO2) emission was measured at an average of 988 tonnes/day on March 7. Precise leveling data obtained from January 25 to February 3, 2019 indicate a slight deflation of the edifice relative to December 8 – 13, 2018.

However, continuous GPS and electronic tilt data show inflation of the mid-slopes since June 2018.

PHIVOLCS maintains Alert Level 2. This means that Mayon is at a moderate level of unrest.

Members of the public are reminded sudden explosions, lava collapses, pyroclastic density currents or PDCs and ashfall can still occur and threaten areas in the upper to middle slopes of Mayon.

Entry into the 6 km (3.7 miles) radius Permanent Danger Zone is strictly prohibited as well as into a precautionary 7 km (4.3 miles) radius Extended Danger Zone in the south-southwest to east-northeast sector, stretching from Anoling, Camalig to Sta. Misericordia, Sto. Domingo.

People residing close to these danger areas are also advised to observe precautions associated with rockfalls, PDCs and ashfall.

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.

Civil aviation authorities must advise pilots to avoid flying close to the volcano’s summit as airborne ash and ballistic fragments from sudden explosions and PDCs may pose hazards to aircrafts.

Featured image credit: DOST-PHIVOLCS

If you value what we do here, open your ad-free account and support our journalism.

Share:

Related articles

Producing content you read on this website takes a lot of time, effort, and hard work. If you value what we do here, select the level of your support and register your account.

Your support makes this project fully self-sustainable and keeps us independent and focused on the content we love to create and share.

All our supporters can browse the website without ads, allowing much faster speeds and a clean interface. Your comments will be instantly approved and you’ll have a direct line of communication with us from within your account dashboard. You can suggest new features and apps and you’ll be able to use them before they go live.

You can choose the level of your support.

Stay kind, vigilant and ready!

$5 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$50 /year

$10 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$100 /year

$25 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$200 /year

You can also support us by sending us a one-off payment using PayPal:

Leave a reply

Your email address will not be published.