About Aluto
Aluto is a stratovolcano rising to 2,335 meters (7,661 feet) in Ethiopia's Eastern Africa Volcanic Regions. Its last known eruption was in 1550 CE. The volcano has produced 5 recorded eruptions.
Geography & Climate
Aluto is located in Ethiopia, within the Main Ethiopian Rift Volcanic Province of the broader Eastern Africa Volcanic Regions. Situated at 7.77° N, 38.78° E in the Northern Hemisphere, the volcano lies within a tropical climate zone. At 2,335 meters above sea level, Aluto rises above the surrounding terrain into montane or subalpine conditions. The elevation creates distinct ecological zones along its flanks, from forested lower slopes to exposed rocky terrain near the summit. The volcanic landform is characterized as a composite, which describes the physical shape and structure of the volcanic edifice as observed from the surface.
Geological Context
Aluto is situated along a rift zone, where tectonic plates are pulling apart. As the crust thins and fractures, magma rises to fill the gap, creating volcanic activity. Rift volcanism typically produces more fluid lava flows rather than explosive blasts, which means communities near Aluto in Ethiopia generally face slower-moving hazards like lava flows and ground fissures rather than sudden pyroclastic events. However, rift volcanoes can still generate significant ash emissions and gas releases that affect local air quality. The dominant rock type is rhyolite, a silica-rich volcanic rock associated with highly viscous magma. Rhyolitic eruptions can be extremely explosive and are responsible for some of the largest volcanic events in Earth's history, including supervolcanic caldera-forming eruptions. The high silica content traps dissolved gases, building enormous pressure that can lead to catastrophic explosive releases.
Eruption History Summary
Aluto has 5 recorded eruptions in the geological database, spanning from 10900 BCE to 1550 CE. This eruption frequency indicates a moderately active volcanic system with periodic reawakenings.
Significance
With 5 recorded eruptions on file, Aluto has enough documented activity to help scientists identify patterns in its eruptive behavior.
GVP Reference Summary
Aluto, between lakes Zway and Langano (Mirrga), is a stratovolcano with multiple vents aligned along NNE-SSW and E-W fissures along a narrow graben between the two lakes. This silicic volcanic center lies along the regional Wonji Fault Belt and has produced abundant pumice-flow and pumice-fall deposits, along with lesser rhyolitic lava flows. Obsidian lava flows erupted from craters along the fissures have descended the flanks in all directions. Cinder cones, lava domes, phreatic explosion craters, and thermal springs are structurally controlled. The oldest known eruptions produced the Hulo-Seyno Ignimbrite about 155,000 years ago. The latest eruptions produced obsidian flows and pumice breccias about 2,000 years ago. Eruptive products overlie recent basaltic lava flows to the west. Strong fumarolic activity continues.
— Smithsonian Institution, Global Volcanism Program
5 Recorded Eruptions
| Year | VEI | Type | Area |
|---|---|---|---|
| 1550 | — | Confirmed Eruption | Tephra sample from E flank of edifice |
| 50 BCE | — | Confirmed Eruption | — |
| 6200 BCE | — | Confirmed Eruption | Tephra sample from Deka Wede (W of caldera) |
| 7280 BCE | — | Confirmed Eruption | Tephra sample from Haroresa (S of caldera) |
| 10900 BCE | — | Confirmed Eruption | Tephra sample from Deka Wede (W of caldera) |
Real-Time Data
USGS Alert Level
Thermal Anomalies
Frequently Asked Questions About Aluto
Is Aluto an active volcano?+
Aluto is not currently classified as active. Its activity evidence is listed as "Eruption Dated." The last known eruption was in 1550 CE. However, no volcano is ever considered permanently extinct.
When did Aluto last erupt?+
The most recent recorded eruption of Aluto occurred in 1550 CE. The eruption was classified as a "Confirmed Eruption." Aluto has 5 recorded eruptions in total.
How high is Aluto?+
Aluto has a summit elevation of 2,335 meters (7,661 feet) above sea level. At 2,335 meters, it is comparable in height to many significant mountain peaks and stands well above the tree line.
What type of volcano is Aluto?+
Aluto is classified as a Stratovolcano. Stratovolcanoes (also called composite volcanoes) are steep, conical volcanoes built up by many layers of hardened lava, tephra, and volcanic ash. They are among the most common and dangerous types, known for explosive eruptions.
Where is Aluto located?+
Aluto is located in Ethiopia, in the Eastern Africa Volcanic Regions. More specifically, it lies within the Main Ethiopian Rift Volcanic Province. Its exact coordinates are 7.770° latitude, 38.780° longitude.
Is it safe to visit Aluto?+
Aluto can generally be visited, but as with any volcano, visitors should check local conditions and any advisory notices before traveling. Ethiopia may have specific regulations for accessing volcanic areas. Guided tours are often the safest and most informative way to experience a volcano.
