Colombia has 14 Holocene volcanoes. Note that as a scientific organization we provide these listings for informational purposes only, with no international legal or policy implications. Volcanoes will be included on this list if they are within the boundaries of a country, on a shared boundary or area, in a remote territory, or within a maritime Exclusive Economic Zone. Bolded volcanoes have erupted within the past 20 years. Suggestions and data updates are always welcome ().

Chronological listing of known Holocene eruptions (confirmed or uncertain) from volcanoes in Colombia. Bolded eruptions indicate continuing activity.

Colombia has 9 Pleistocene volcanoes. Note that as a scientific organization we provide these listings for informational purposes only, with no international legal or policy implications. Volcanoes will be included on this list if they are within the boundaries of a country, on a shared boundary or area, in a remote territory, or within a maritime Exclusive Economic Zone. Suggestions and data updates are always welcome ().

There are 35 photos available for volcanoes in Colombia.

Galeras, a stratovolcano with a large breached caldera located immediately west of the city of Pasto, is one of Colombia's most frequently active volcanoes. It is seen here from the south on March 17, 1989, with steam clouds pouring from vents on the large central cone near the back headwall of the caldera, whose south rim forms the ridge in the foreground. Major explosive eruptions since the mid Holocene have produced widespread tephra deposits and pyroclastic flows that swept all but the southern flanks.

Photo by Norm Banks, 1989 (U.S. Geological Survey). The summit of Cerro Negro de Mayasquer volcano is truncated by a caldera that is breached to the west. This view from the NW shows snow-capped Volcán Chiles at the upper left. Eruptive activity at these twin volcanoes has migrated to the west, with the most recent eruptions occurring from Cerro Negro de Mayasquer. A small crater lake is found at the bottom of the 900 x 1500-m-wide caldera. An eruption that was reported from the volcano in 1936 may actually have been from Reventador volcano to the SE.

Photo by Minard Hall, 1985 (Escuela Politécnica Nacional, Quito) An ash plume from the summit crater of Galeras volcano rises above the city of Pasto on May 5, 1989. Intermittent phreatic explosions ejected ash and blocks from the El Pinta vent beginning on February 19. Periods of stronger activity took place on March 26-27 and May 4-9. The May activity produced pyroclastic surges near the crater.

Photo by Norm Banks, 1989 (U.S. Geological Survey). A large cone fills much of the large collapse scar at Galeras. It is seen degassing here on 18 March 1989 from the SE. The El Viejo flank crater can be seen near the center of the photo, with the Bastón fissure to the right, just below the rim of the main crater. The central cone has been the site of frequent eruptions since the time of the Spanish conquistadors.

Photo by Norm Banks, 1989 (U.S. Geological Survey). A record of the 13 November 1985 eruption of Nevado de Ruiz was preserved in ice-rich levees of pyroclastic flows. This photo, taken a month later, shows parallel-bedded pyroclastic-surge deposits, composed of snow grains and tephra, which were deposited over a pre-existing ice at the bottom of the photo. The surge layers are overlain at the top by coarser-grained pyroclastic-flow deposits. The clast of glacial ice (located left of the upper part of the ice axe) was scoured and incorporated into the pyroclastic flow.

Photo by Tom Pierson, 1985 (U.S. Geological Survey). Nevado del Huila is an elongate, N-S-trending glaciated edifice constructed within an old caldera, seen here from the SW. The northern peak (La Cuesta) is to the left and the lower southern peak to the right is Pico Central.

Photo by Juan Carlos Diago, 1995 (courtesy of Bernardo Pulgarín, INGEOMINAS, Colombia). A plume rises from the summit crater of Nevado del Ruiz volcano on 10 December 1985. Pyroclastic surge and ashfall deposits from the 13 November eruption coat the glaciers. Glaciers on the upper NE-flank headwall of the Azufrado valley (foreground) were scoured by pyroclastic surges.

Photo by Tom Pierson, 1985 (U.S. Geological Survey). The glacier on Nevado del Ruiz is seen here above the Azufrado valley on the NE flank. Debris avalanche deposits from an eruption roughly 3,100 years ago, and from the 1595 eruption, appear in the foreground. The major eruption about 3,100 years ago produced a large ashfall deposit, the debris avalanche, and associated lahars and pyroclastic surges. The 1595 eruption, the largest from Ruiz in historical time, was similar. Lahars in 1595 caused over 600 fatalities.

Photo by Jean-Claude Thouret (Université Grenoble). A gas plume rises above the glaciated Nevado del Huila Pico Central, seen here from the east in September 1996. Long-term, persistent, gas plumes occurred prior to the onset of eruptive activity in 2007. Before then, only a single 16th century eruption was known during historical time.

Photo by Bernardo Pulgarín, 1996 (INGEOMINAS, Colombia). Two weeks after the 13 November 1985 eruption, a plume rises from Las Arenas, the summit crater of Nevado del Ruiz. This view from the NNW shows pyroclastic surge and pyroclastic flow deposits mantling the summit icecap. Grooves descending the upper glacier surface were scoured by pyroclastic surges, which reached 5.5 km NW and NE of the summit. Melting of the summit icecap during the eruption led to devastating lahars that traveled as far as 100 km from the volcano and caused 24,000 fatalities.

Photo by Norm Banks, 1985 (U.S. Geological Survey). Glaciated Tolima volcano is seen here looking south from the flank of Nevado del Ruiz. The summit consists of late-Pleistocene to Holocene lava domes and contains a crater 200-300 m deep. Holocene activity has ranged from moderate explosions to Plinian eruptions. A recent major eruption took place about 3,600 years ago and minor explosive eruptions took place in the 19th and 20th centuries.

Photo by Tom Pierson, 1985 (U.S. Geological Survey). A cluster of rounded boulders was deposited on a river terrace by a lahar in the Río Chinchina valley, 59 km WNW of the summit of Colombia's Nevado del Ruiz volcano on 13 November 1985. The boulders were carried within the lahar and deposited against the tree that served as an obstruction to flow. Note the mudline on the tree that marks the upper flow surface of the lahar.

Photo by Tom Pierson, 1985 (U.S. Geological Survey). Cerro Bravo in Colombia is seen to the north from the N flank of Nevado del Ruiz. The CB1 summit dome rises above an older dome and cone complex, probably produced during the CB7-CB5 eruptive periods. Below this, the remains of the pre-Cerro Bravo volcano encompass the Pleistocene Quebrada Seca caldera. Most of the Pleistocene lava flows in the foreground are associated with Nevado del Ruiz.

Photo by David Lescinsky, 1988 (University of Western Ontario). The terraces along the Toche River are composed of thick pyroclastic flow deposits produced during Holocene explosive eruptions of Cerro Machín. The summit lava domes are seen on the horizon in this view from the NNW. This small but explosive volcano is located at the southern end of the Ruiz-Tolima massif.

Photo by José Macías, 1996 (Universidad Autómona de México). Cerro Bravo is seen from the east. The summit dome was extruded during the most recent eruption and has a spine (a steep dome) near the top. An older lava dome and cone complex is situated to the left. Multiple collapse events sent block-and-ash flows down over lava flows (center) and onto the Plan de Arriba (lower left). The low tree-covered slope (left foreground) is the remnant of the pre-Cerro Bravo edifice that was destroyed by a Pleistocene caldera-forming event.

Photo by David Lescinsky, 1988 (University of Western Ontario). Galeras, one of the most active volcanoes of Colombia, rises west of the city of Pasto. The high point is the eastern rim of a large caldera that is breached to the west and serves to funnel most of the eruptive products of the volcano away from the city. Larger explosive eruptions during historical time have produced pyroclastic flows that overtopped the caldera rim.

Photo by John Ewert, 1989 (U.S. Geological Survey). Nevado del Tolima rises to the south above the forested mountains of the Central Cordillera of Colombia. The summit consists of a late-Pleistocene to Holocene lava domes that were associated with thick lava flows and extensive pyroclastic flow deposits. A major eruption took place about 3,600 years ago and moderate historical eruptions have occurred in the 19th and 20th centuries.

Photo by Norm Banks, 1895 (U.S. Geological Survey). On August 27, 1936, a vigorous explosive eruption took place from Galeras volcano. Photographs taken from Pasto show pyroclastic flows descending the NE flank to distances of 3-4 km from the summit. The timing of eruptive activity in 1936 is ambiguous, but evidence does exist for an eruption on February 9 that produced explosions, the ejection of incandescent bombs, and an ash plume.

Photo courtesy of Marta Calvache, 1936 (INGEOMINAS-Observatorio Vulcanológico del Sur). A road cut exposes a pyroclastic flow deposit (left) overlying older granite (lower right). The dark zone dipping away from the front of the jeep, at the base of the pyroclastic flow deposit, are trees charred by the hot pyroclastic flow. This site is located along the road that connects the cities of Ibague and Cajamarco, close to the town of El Boqueron, about 12 km from Cerro Machín volcano.

Photo by José Macías, 1996 (Universidad Autómona de México). On 13 November 1985 lahars traveled down the upper Guali River drainage on the N flank of Nevado del Ruiz, seen here descending diagonally from right of center to the lower left. Farmhouses are visible on the opposite side of the channel for scale. The lahars traveled down the Río Guali at velocities up to 17 meters/second to over 100 km from the volcano.

Photo by Tom Pierson, 1985 (U.S. Geological Survey). Sotará in Colombia is shown in the center of this February 2020 Planet Labs satellite image monthly mosaic (N is at the top; this image is approximately 19 km across). The edifice formed within a 4.5-km-diameter caldera and has a collapse scarp open towards the SW, as well as several lava domes in the summit area. Thick lava flows and domes have been emplaced within the scarp.

Satellite image courtesy of Planet Labs Inc., 2020 (https://www.planet.com/). Cumbal is the southernmost historically active volcano of Colombia. It is seen here from the north, with a young lava dome occupying the 150-m-wide summit crater. Flank craters, the youngest of which is Boca de Mundo Nuevo, have formed along radial fissures on the east and south flanks of the nearly symmetrical volcano. Eruptions from the upper east flank produced a 6-km-long lava field. Explosive eruptions in 1877 and 1926 are the only known historical activity from Cumbal.

Photo by Norm Banks, 1989 (U.S. Geological Survey). Cerro Negro de Mayasquer is the youngest of a pair of twin volcanoes along the Ecuador-Colombia border. It is seen here from the Ecuadorian side on the south. The long ridge to the left of its summit is the rim of a horseshoe-shaped caldera that is breached to the NW.

Photo by Minard Hall, 1985 (Escuela Politécnica Nacional, Quito) The 1985 eruption of Colombia's Nevado del Ruiz volcano produced the deadliest lahars (volcanic mudflows) in recorded history. A relatively moderate explosive eruption melted parts of the summit icecap and sent lahars down four major drainages. The town of Armero, shown here, was destroyed by a lahar that had traveled 74 km east of the summit and exited a narrow canyon above the town in a 40-m-high wave. Three-quarters of the 28,000 inhabitants of Armero were killed because officials and residents were not prepared for the danger the volcano posed.

Copyrighted photo by Katia and Maurice Krafft, 1985. Azufral stratovolcano in southern Colombia, seen here from the SE, is also known as Azufral de Túquerres. It is truncated by a 2.5 x 3 km caldera containing a Holocene lava dome complex. A crescent-shaped lake, Laguna Verde, occupies the NW side of the caldera. Nearly a dozen lava domes are present, the latest of which were formed about 3600 years ago and have active fumaroles. The last known eruption of Azufral volcano took place about 1000 years ago.

Photo by Norm Banks, 1989 (U.S. Geological Survey). The Doña Juana complex in Colombia is shown in this September 2017 Planet Labs satellite image monthly mosaic (N is at the top; this image is approximately 8 km across). The summit area is shaped by a large scarp that has been infilled by lava domes, which have subsequently undergone collapse events to produce block-and-ash flow deposits.

Satellite image courtesy of Planet Labs Inc., 2017 (https://www.planet.com/). A dark, steaming lava seen from the east was emplaced during an eruption from Huila volcano that began in 2008. Pico del Sur lies at the left, with glacier-covered Pico Central at upper right and Pico Norte at far right. The lava dome straddled the summit ridge and descended opposite sides of the volcano. A major lahar in November 2008 swept down the Rio Paez, causing extensive damage. Long-term ome growth and periodic ash emissions continued.

Photo by Tom Pierson, 2010 (USGS, Cascades Volcano Observatory). Two central lava domes of Cerro Machín volcano are seen here from the SW. A 3-km-wide caldera, whose rim is the horizontal change in slope across the center of the photo, opens towards the south. Late-Holocene eruptions produced block-and-ash flows that traveled to the west and south, beyond the caldera. Deposits from some of these eruptions form the eroded slopes in the lower part of the photo along the valley of the Toche River.

Photo by José Macías, 1996 (Universidad Autómona de México). Romeral volcano forms the area in the center of this 24 January 2018 Sentinel-2 satellite image, NE of the city of Manizales (N is at the top; the image is approximately 19 km across). It produced two Plinian pumice eruptions that blanket areas NW of the volcano, and is located at the northern end of the Ruiz-Tolima volcanic chain.

Satellite image courtesy of Copernicus Sentinel Data, 2018. Santa Isabel is a small glaciated volcano is seen here from its much larger neighbor to the NE, Nevado del Ruiz. Holocene lava flows fill SW and SE valleys. A small Holocene lava dome was emplaced about 10 km SW of the volcano.

Photo by Norm Banks, 1985 (U.S. Geological Survey). Nevado del Ruiz is a broad glacier-covered volcano that covers more than 200 km². The modern cone consists of a cluster of lava domes constructed within the summit caldera of an older edifice. The ash-mantled summit is seen here from the ESE on 18 December 1985, a little more than a month after the catastrophic eruption of 13 November. The devastating 1985 lahars swept down four major river drainages that day and caused around 24,000 fatalities.

Photo by Norm Banks, 1985 (U.S. Geological Survey). Cerro Negro de Mayasquer (Ieft) and snow-capped Volcán Chiles (right), seen here from the south, are twin volcanoes that straddle the Colombia-Ecuador border. Chiles volcano is of Pleistocene age, but has hot springs and an active hydrothermal system on its eastern flank. Cerro Negro de Mayasquer is a stratovolcano with a caldera open to the west. Andesitic and dacitic lava flows are of possible Holocene age. Solfataras are found on the shore of a small crater lake.

Photo by Minard Hall, 1985 (Escuela Politécnica Nacional, Quito) This aerial view of the Río Páez, with flow direction to the top, shows the path of the November 2008 lahars. The village at upper right is Mesa de Caloto, SSW of Huila. An eruption on November 20, 2008 destroyed part of the new lava dome, and hot material melted areas of the surrounding glacier and caused lahars in the Bellavista and Páez rivers, damaging infrastructure and destroying homes along the Río Páez.

Photo by Tom Pierson, 2010 (USGS, Cascades Volcano Observatory). Snow-capped Puracé volcano has a 500-m-wide summit crater and is one of the most active volcanoes in Colombia. Frequent explosive eruptions in the 19th and 20th centuries have modified the morphology of the summit crater, with some of the largest occurring in 1849, 1869, and 1885.

Photo by Federmán Escobar Chávez, 2005. The catastrophic 1985 eruption of Nevado del Ruiz began with moderate phreatic explosions on September 11. On November 13 a relatively moderate explosive eruption occurred, producing pyroclastic flows and surges that melted part of the summit icecap. These caused major lahars that devastated Amero and other towns on the flanks of the volcano, killing more than 23,000 people. Intermittent minor ash emissions, such as this one on November 28, and occasional stronger phreatomagmatic eruptions continued until July 1991.

Copyrighted photo by Katia and Maurice Krafft, 1985.

This is a compilation of Colombia volcano information sources, such as official monitoring or other government agencies.