Volcano news: Pacaya (Guatemala)
Pacaya volcano (Guatemala) activity update: deep-seated explosive activity
Wednesday Dec 07, 2016 10:49 AM | DOOR: T
Pacaya's intra-crater cone in early Dec 2016 (image: Mynor Marroquin via @ClimaEnGuate / Twitter)
The volcano's activity has been comparably calm recently, characterized by strong degassing from the intra-crater cone that formed during the latest period (2015-16) of strombolian activity and has become impressively large, filling a good part of the crater now.
Thermal signal from Pacaya (image: SENTINEL2 - ESA/Copernicus, annotated by Culture Volcan)
On a recent video, no ejections of lava fragments are visible, but rather near-continuous, pulsating emissions of steam and ash. These probably reflect an activity weaker than, but essentially similar to what we observed in Dec last year: spattering-type degassing ("bubbling") from the magma column inside the cone, generating near-continuous small strombolian explosions. The only real difference would be that this time the effusion rate is too low and activity too deep to eject incandescent lava spatter.
Impresionante. Se ha formado un tipo de cono dentro del cráter del Volcán de Pacaya. Video captado hoy por Mynor Marroquín pic.twitter.com/Nki03FThQh— Clima Guatemala (@ClimaenGuate) December 6, 2016
INSIVUMEH mentions a bluish gas plume rising up to 800 m from the Mackenney crater (to 3,300 m altitude) and no apparent explosive activity. On the other hand, internal seismic activity and the mentioned observation of spattering-type degassing, as well as a thermal signal from the volcano seen on satellite data suggest that the eruptive activity continues with little changes (just less visible).
Friday, Jul 29, 2016
Mild strombolian activity continues from the Mackenney crater. According to a recent report, this activity ejected glowing material to 75 m above the crater and weak incandescence could be observed from the crater at night. [meer...]
Thursday, Jun 16, 2016
The activity at the volcano has started to increase during the past days. Explosion sounds and visible incandescence have become stronger. ... [meer...]
Tuesday, Mar 29, 2016
Mild activity continues at the intra-crater cone of the Mackenney crater. INSIVUMEH reports a steam and gas plume rising 600 m and glow from lava visible at night. [meer...]