About Tri Sestry
Tri Sestry is a stratovolcano rising to 998 meters (3,274 feet) in Russia's Northwestern Pacific Volcanic Regions. No historical eruptions have been recorded, though the volcano is classified based on geological evidence of past activity.
Geography & Climate
Tri Sestry is located in Russia, within the Kuril Volcanic Arc of the broader Northwestern Pacific Volcanic Regions. Situated at 45.93° N, 149.92° E in the Northern Hemisphere, the volcano lies within a temperate climate zone. With a summit elevation of 998 meters above sea level, Tri Sestry 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.
GVP Reference Summary
The Tri Sestry ("Three Sisters") volcanic complex is located in the center of Urup Island, in the south-central Kuril Islands. Erosion of this andesitic massif has cut deep ravines on the flanks and produced multiple peaks around a river valley open to the NNE. The southern range of those peaks is known as Petr Shmidt Ridge. A summit lava dome was considered by Gorshkov (1970) to have been active during either the late Pleistocene or early Holocene; hot springs were reported along the coast to the NW. No later research is known that describes or dates eruption deposits.
— Smithsonian Institution, Global Volcanism Program
0 Recorded Eruptions
No eruption records available for Tri Sestry.
Real-Time Data
USGS Alert Level
Thermal Anomalies
Frequently Asked Questions About Tri Sestry
Is Tri Sestry an active volcano?+
Tri Sestry is not currently classified as active. Its activity evidence is listed as "unknown." No recorded eruptions have been documented. However, no volcano is ever considered permanently extinct.
How high is Tri Sestry?+
Tri Sestry has a summit elevation of 998 meters (3,274 feet) above sea level. At 998 meters, it is a relatively low-elevation volcano.
What type of volcano is Tri Sestry?+
Tri Sestry 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 Tri Sestry located?+
Tri Sestry is located in Russia, in the Northwestern Pacific Volcanic Regions. More specifically, it lies within the Kuril Volcanic Arc. Its exact coordinates are 45.926° latitude, 149.922° longitude.
Is it safe to visit Tri Sestry?+
Tri Sestry can generally be visited, but as with any volcano, visitors should check local conditions and any advisory notices before traveling. Russia may have specific regulations for accessing volcanic areas. Guided tours are often the safest and most informative way to experience a volcano.
