About Uliaga
Uliaga is a stratovolcano rising to 888 meters (2,914 feet) in United States's North America Volcanic Regions. No historical eruptions have been recorded, though the volcano is classified based on geological evidence of past activity.
Geography & Climate
Uliaga is located in United States, within the Aleutian Ridge Volcanic Arc of the broader North America Volcanic Regions. Situated at 53.06° N, 169.77° W in the Northern Hemisphere, the volcano lies within a temperate climate zone. With a summit elevation of 888 meters above sea level, Uliaga is a moderately sized peak that remains accessible to hikers and researchers for much of the year. 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
Uliaga sits in a subduction zone, where one tectonic plate dives beneath another, creating intense heat and pressure that generates magma. Subduction zones are responsible for many of the world's most explosive volcanoes and deadliest eruptions. For communities in United States near Uliaga, this tectonic setting means the volcano is capable of producing powerful explosive eruptions, pyroclastic flows, and lahars that can threaten populated areas within tens of kilometers of the summit. The dominant rock type is no data (checked), which influences the viscosity of the magma and, consequently, the style of eruptions this volcano produces. Rock chemistry is one of the most important factors in determining whether a volcano erupts explosively or effusively.
GVP Reference Summary
The small 3-km-wide island of Uliaga, located at the NE end of the Islands of the Four Mountains archipelago immediately NW of Kagamil Island, is an eroded stratovolcano. It is the smallest of the Islands of the Four Mountains volcanoes. There are no reports of historical eruptions, but is was considered to have been active during the Holocene by Nye et al. (1998).
— Smithsonian Institution, Global Volcanism Program
0 Recorded Eruptions
No eruption records available for Uliaga.
Real-Time Data
USGS Alert Level
Thermal Anomalies
Frequently Asked Questions About Uliaga
Is Uliaga an active volcano?+
Uliaga is classified as active based on credible evidence of past eruptions. Although its last known eruption was in prehistoric times, volcanologists consider it capable of erupting again.
How high is Uliaga?+
Uliaga has a summit elevation of 888 meters (2,914 feet) above sea level. At 888 meters, it is a relatively low-elevation volcano.
What type of volcano is Uliaga?+
Uliaga 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 Uliaga located?+
Uliaga is located in United States, in the North America Volcanic Regions. More specifically, it lies within the Aleutian Ridge Volcanic Arc. Its exact coordinates are 53.065° latitude, -169.770° longitude.
Is it safe to visit Uliaga?+
Uliaga can generally be visited, but as with any volcano, visitors should check local conditions and any advisory notices before traveling. United States may have specific regulations for accessing volcanic areas. Guided tours are often the safest and most informative way to experience a volcano.
