Taal volcano (Luzon Island, Philippines): highest SO2 emissions level ever recorded yesterday, vog detected

Sat, 16 Oct 2021, 22:46
22:46 PM | BY: MARTIN
Taal volcano from satellite on 4 October (image: Sentinel 2)
Taal volcano from satellite on 4 October (image: Sentinel 2)
A strong fumarolic activity continues at the volcano.
The local observatory PHIVOLCS recorded 23,576 tonnes/day! of sulfur dioxide (SO2) emissions yesterday. This data is the highest level recorded in Taal volcano ever since 5 July when the latest emissions record was reached.
In addition, a volcanic smog (so-called vog) in Taal caldera has been detected due to elevated fumarolic activity. Vog is a hazy mixture of SO2 gas and aerosols (tiny particles or droplets) which are primarily sulfuric acid and other sulfate (SO4) compounds. Aerosols are created when SO2 and other volcanic gases combine in the atmosphere and interact chemically with oxygen, moisture, dust, and sunlight over minutes to days. The exact composition of vog depends on how much time the volcanic plume has had to react in the atmosphere. In areas far (tens to hundreds of km or miles) from active vents, aerosols are the main component of vog. Closer to the volcano, vog contains both aerosols and unreacted SO2 gas.
The fumarolic activity is accompanied by near-constant emissions of steam-laden plumes which reached approx. 9,800 ft (3,000 m) altitude and dispersed E-SE and W-SW.
The seismic network detected 12 two-to-five-minute tremors during t24 hours between 15-16 October. This indicates that magma is moving and accumulating underneath the surface and might cause new eruptions at any time.
Instruments continue to detect local ground deformation (inflation) since August, another tell-tale sign of an impending eruption.
The alert level for the volcano remains at "yellow".
Source: Phillippine Institute of Volcanology and Seismology volcano activity update 16 October 2021

Previous news

Wed, 11 Aug 2021, 05:00
Steam plumes from Taal volcano today (image: PHIVOLCS)
After 16 days of apparent calm period, degassing activity returned to the Taal Main Crater crater today which indicates elevated fluid movements of gas, water and possibly magma under the surface and might cause new eruptions at any time. ... Read all
Wed, 14 Jul 2021, 05:34
Satellite image of Taal volcano on 11 July (image: Sentinel 2)
The volcano continues at the phase of intense activity over the past month. ... Read all
Show more
Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

More on VolcanoDiscovery

Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.
Home | Travel | Destinations | Volcanoes | Photos | Earthquakes | About | Glossary | News | Contact | Privacy | Imprint | EN | DE | EL | ES | FR | IT | RU
Follow us:Follow us on facebookFollow us on InstagramFollow us on TwitterVisit our Youtube channel