BackgroundThe silicic Barahona caldera complex, which lies NE of Acatenango volcano and NW of Agua volcano, consists of two overlapping calderas. The northern caldera is 4.5 km in diameter and its floor is the site of the town of Santa Catarina Barahona, after which the complex is named. The southern caldera is about 2 km in diameter. The initial eruptions of the Barahona complex produced the Sumpango group of tephras, which date back to 300,000-250,000 years. The youngest tephra from Barahona is less than 23,000 years old. The rhyolitic and rhyodacitic tephras include 5 plinian deposits and a pyroclastic-flow deposit.
Source: Smithsonian / GVP volcano information
See also: Sentinel hub | Landsat 8 | NASA FIRMS