About Segula
Segula is a stratovolcano rising to 1,160 meters (3,806 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
Segula is located in United States, within the Aleutian Ridge Volcanic Arc of the broader North America Volcanic Regions. Situated at 52.02° N, 178.14° E in the Northern Hemisphere, the volcano lies within a temperate climate zone. With a summit elevation of 1,160 meters above sea level, Segula 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
Segula 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 Segula, 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 andesite / basaltic andesite, a dark, fine-grained volcanic rock that forms from rapidly cooling, low-viscosity lava. Basaltic eruptions tend to be less explosive and produce fluid lava flows that can travel long distances. While less immediately dangerous than explosive eruptions, basaltic lava flows can destroy structures and infrastructure in their path, and volcanic gases released during these eruptions can affect air quality over a wide area.
GVP Reference Summary
The 6 x 7 km island of Segula east of Kiska volcano consists of a conical stratovolcano cut by a prominent NNW-SSE-trending fissure that extends to sea level at both ends of the island. The northern end of the fissure is flooded by the sea to produce a long, narrow cove. Segula was constructed above a 100-m-deep submarine platform that extends eastward to Khvostof and Davidof islands. A submarine debris-avalanche deposit extends up to 18 km offshore to the north. The summit contains a small, poorly defined caldera that is partly overtopped on the south by a cinder cone that forms the high point of the island and on the north by extensive lava flows that reach the NE coast along a broad front. Another lava field on the SE coast originated from a cinder cone at 300 m elevation on the SE flank. No historical eruptions are known, but Nelson (1959) considered fresh lava flows on the N flank to possibly be only a few hundred years old.
— Smithsonian Institution, Global Volcanism Program
0 Recorded Eruptions
No eruption records available for Segula.
Real-Time Data
USGS Alert Level
Thermal Anomalies
Frequently Asked Questions About Segula
Is Segula an active volcano?+
Segula 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 Segula?+
Segula has a summit elevation of 1,160 meters (3,806 feet) above sea level. At 1,160 meters, it is a moderately sized volcanic peak, roughly comparable to Mount Vesuvius (1,281m).
What type of volcano is Segula?+
Segula 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 Segula located?+
Segula 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 52.015° latitude, 178.136° longitude.
Is it safe to visit Segula?+
Segula 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.
