Turrialba volcano (Costa Rica) update: Seismicity remains stable

Fri, 8 Apr 2022, 12:05
12:05 PM | BY: LEANDRA
Turrialba Multigas Stations. Photo Credit: OVSICORI-UNA.
Turrialba Multigas Stations. Photo Credit: OVSICORI-UNA.
The last phreatic eruption occurred on February 28, 2022. Seismicity remains stable. There is an increase in the number and duration of short tremors of low amplitude. Volcanic tremors are distal and associated with local faults. Geodetic monitoring shows a slight contraction of the volcanic edifice.
Degassing is stable, with weekly CO2/SO2 levels at 22.8 +/- 3.3 and H2S/SO2 levels at 0.25 +/- 0.21, resembling previous weekly measurements. The amount of SO2, measured in the atmosphere by satellite, is variable without any trend.
Drone inspection of the West Crater (or Cráter Murciélago) shows some fumaroles at the bottom of the crater, mostly in the bottom east sector, releasing water vapor and sulfur gases. Remote sensing with infrared thermography records temperatures of at least 113 degrees Celsius at the fumaroles.

Previous news

Sun, 13 Mar 2022, 00:15
Fine particles of ash and gas rose from Turrialba volcano this morning. The orange-to-red color of the plume doesn't relate to the magma glow but the reflection of sunlight (image: OVSICORI-UNA)
The activity at the volcano continues at generally low levels. ... Read all
Thu, 3 Mar 2022, 00:58
OVSICORI-UNA reported that a point of incandescence on the SW wall of Turrialba's Cráter Oeste was visible on 23 February and was coincident with the area of strongest gas emissions. At 1955 on 27 February an eruption produced a diffuse ash plume that rose 300 m above the summit and drifted NE. Rumbling heard on 28 February was sometimes coincident with minor ash emissions. ... Read all
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