Mt Spurr

Mt Spurr is a stratovolcano located west of Anchorage, Alaska. It is the highest peak in the Aleutian Arc. The volcano was named for the explorer Josiah Spurr who worked for the USGS.

Mt. Spurr, USGS

Mount Spurr, Alaska USGS

Original summit
Mount Spurr is a lava dome that sits inside a caldera three miles wide. The original summit of the mountain was destroyed by a debris avalanche and pyroclastic flows.

Debris avalanche 15 miles long
Some of the blocks carried down the mountain in a debris avalanche were over 300 feet in diameter. They traveled over 15 miles away from the summit before being deposited at the base of the volcano.

Click for More Information and to Order

Mount Spurr today
Today several lava domes sit in the caldera besides Mount Spurr. Mount Spurr is the tallest of the peaks in the area. It is 11,070 feet above sea level. It is also the summit peak on the mountain.

Monitoring the mountain
The peak and its neighbors are constantly being monitored by geologists. They are a major threat to airliners if they suddenly erupted without warning and a jet plane flew through an ash cloud.

More Pacific Ring of Fire Links

Challenger Deep Learn more about the deepest point on the ocean floor that lies seven miles beneath the ocean's surface.

Composite Volcano Learn more about these towering mountains that form on the continents near subduction zones.

Cascadia Subduction Zone Learn more about the Cascadia Subduction Zone in the Pacific Northwest where a great earthquake could occur at any time.

2010 Chilean Earthquake Another megathrust earthquake struck Chile in 2010. Find out why these earthquakes occur so frequently there.

Island Arcs  Island arcs are a string of volcanic islands in the ocean. Find out more about these islands in the Pacific Ocean.

Mt Spurr Find out more about Mt Spurr which is the tallest peak in the Aleutian Volcanic Arc.

Pacific Ring of Fire Learn more about the Ring of Fire which is home to towering volcanoes and great earthquakes.

Kids Fun Science The links on our home page include information about volcanoes, science activities, plate tectonics, the rock cycle and much more

KIDS FUN Science Bookstore

Check out Myrna Martin's award winning textbooks, e-books, videos and rock sets.  The Kids Fun Science Bookstore covers a wide range of earth science topics.  Click here to browse.