Small ash emission from Galeras yesterday (INGEOMINAS)
Ash emissions have become more frequent since 4 April - the Pasto observatory has reported daily small explosions since then. This marks a significant increase in activity. Before, the volcano had produced such emissions only a few times per month since September 2012. ...plus
No corresponding increase in seismic activity was reported and the (official) alert level remains at yellow (corresponding to "orange"="minor activity" on the scale we use). [moins]
Today's seismic recording from Nevado del Ruiz (OLL station, INGEOMINAS)
SO2 plume from Nevado del Ruiz (NOAA)
During clear days, steaming and occasional weak ash venting (on 22 and 25 March) was observed. Seismic activity has shown a decreasing trend recently, INGEOMINAS reported. Most earthquakes detected at the volcano recently were related to internal fluid movements and of weak energy.
Activity has remained more or less unchanged, with occasional weak ash emissions and degassing observed at the crater. ...plus
A magnitude 3.1 earthquake located 5.6 km WNW of the crater was recorded yesterday at 06:12:38 local time. In the past week, there were 2 seismic swarms with a total of 260 weak quakes on 11 and 12 March. [moins]
Sporadic small steam and sometimes ash emissions continue to be observed from time to time, such as on 22 and 27 Jan. Low-energy tremor pulses accompany the emissions. Seismicity has been of low energy during the past week.
Seismic recording at Galeras yesterday evening (ANGV station, INGEOMINAS)
A slight increase in seismic activity was reported by Pasto Observatory. Most seismicity was related to fluid movements within the volcano, some by degassing and light ash venting, which was observed on 16 and 21 January. ...plus
Steam plumes rose to a maximum of 1000 m above the crater, and measured SO2 levels were at moderate levels. [moins]
Current seismic signal from Galeras (ANGV station, INGEOMINAS)
Seismic activity reflects fluid movement inside the volcano and has shown a slight increase in frequency and energy compared to the previous weeks. Some of these events were associated with degassing from the main crater and fumarolic fields located in the west and north of the active cone. Emissions including some ash venting was observed on 1,2,3 and 4 January.
Copyright: VolcanoDiscovery. Utilisation de matériel: Le texte et les images sur cette page Web sont garantis des droits d'auteur. Davantage de reproduction et d'utilisation sans autorisation n'est pas consentie. Si vous avez besoin d’une autorisation des droits d’auteur pour des photographies, par exemple pour des publications et d’usage commercial, contactez-nous SVP.