Taal volcano (Philippines): volcano is warming up, alert level raised
Fri, 29 Mar 2019, 18:1318:13 PM | BY: T
The volcano has been becoming more restless and is showing signs of a possible reawakening. PHIVOLCS raised its alert status from 0 (normal) to 1 (abnormal) yesterday.
Satellite image of Taal volcano
A seismic swarm has been detected under the volcano since 22 March, including more than 50 volcanic-tectonic earthquakes, which could indicate rock-fracturing beneath the volcanic edifice possibly associated with hydrothermal activity or magma movements at depth.
In addition, GPS measurements showed a slight inflation and the temperature of the lake has increased from 30.7 degrees to 31.7 degrees in tandem with an increase of magma-derived carbon dioxide emissions (one of the first indicators of new magma at depth).
These data do not mean that an eruption is likely to occur in the near future, but could be early warning signs if they are caused by magma intrusion at depth. They however suggest that the shallow hydrothermal system is currently in disequilibrium, which could lead to sudden steam explosions with little or no warning.
"The public is reminded that the Main Crater should be strictly off-limits because sudden steam explosions can occur and high concentrations of lethal volcanic gases can be released. The northern portion of the Main Crater rim, in the vicinity of Daang Kastila Trail, can also become hazardous when fumarolic or degassing activity along existing fissures suddenly increases." (PHIVOLCS)
Links / Sources:
Links / Sources:
- TAAL VOLCANO BULLETIN 28 March 2019 9:15 AM (PHIVOLCS)
Mon, 1 Jul 2013, 16:38
Seismic activity remains above background. During 26-27 June, PHILVOLCS recorded 15 volcanic earthquakes. Read all
Thu, 13 Jun 2013, 14:27
A pulse of more frequent earthquakes (7-9 per day) has been detected under the volcano in recent days. Other parameters show at present no significant changes. ... Read all