129dating online guide
With repeat aerial photography, scientists calculated a total dome volume of 52 x 10 with dimensions of 1,000 m N-S and 250 m E-W.
The fresh dome rock continuously degassed (figure 29).
A crack that had formed along the N face of Pico Central in 2007 continued to steam during this time period.
During three overflights conducted in January 2009, INGEOMINAS determined that the Pico Central lava dome had grown since November 2008.
From January 2009 to December 2012, the Instituto Colombiano de Geología y Minería (INGEOMINAS) reported persistent emissions from the lava dome and dramatic changes to the perched glacier as the lava dome expanded across the E and W flanks.
Activity generally decreased in November 2010 through 2012.
In this view, the SW flank (centered) emitted a small gas column.
The summit of Pico Central is located approximately beneath the text BUCB.
Note that yellow and black lines represent major and minor roads, respectively, and blue lines represent rivers. With support from the Colombian Air Force (FAC) during 2009-2012, INGEOMINAS monitored dome growth and geomorphological changes at Huila by conducting aerial observations with helicopters.
The local monitoring network was expanded during this reporting period, adding two infrasound monitoring stations in 20, two webcameras in 20, and instrumentation at the Caloto site that included a broadband seismometer and an electronic tilt station in 2012.
From December 2008 to December 2009, the Tafxnú web-camera (located ~15 km S of the volcanic edifice) frequently recorded gas-and-ash plumes rising higher than 2,000 m above the active dome (figure 26).