Juan de Fuca Plate

On the morning of February 28, 2001 the Pacific Northwest was hit by a 45 second, 6.8 magnitude intraslab earthquake called the Nisqually or “The Ash Wednesday” earthquake. The Nisqually earthquake occurred when the Juan de Fuca plate subducted under the North American plate, this quickly released the built up strain. This was caused by mineral changes as the plate moved farther into the mantle. The Nisqually earthquake hit the southern end of Puget Sound causing damage to the ports of Seattle and Tacoma. Most of the property damage occurred near the epicenter. For example, in Seattle, the Alaskan Viaduct and its seawall were extremely damaged. In Olympia the Fourth Avenue Bridge was damaged. Following the earthquake liquefaction, sand boils,…

1.1 Juan de Fuca Ridge - case study In Salmi et al. (2014) they deployed thermal blankets in a 450-700m area of a segment on the Juan de Fuca Ridge to examine the effects of hydrothermal circulation on very young oceanic 2 crust. The Juan de Fuca Ridge is a tectonic spreading center located off the coast of Washing- ton in the United States. The ridge is considered an intermediate spreading ridge as it spreads 5.6-5.7 cm/yr.
Several methods exist to measure the heat flow, some measure the…

Plate tectonics is a theory about how the plates are constantly moving on top of a layer of magma that is constantly taking in old crust to recycle it this constant movement causes earthquakes, tsunamis and other geological events. The movement of the Pacific and North American plates cause the old sea floor to be replaced by the now wider North American plate. Also with the movement the continental plate was stretched as the Pacific plate pulled the continental plate to the northwest which…

Earthquakes and volcanoes go hand in hand like peanut butter and jelly or rice and beans. Where there are volcanos there are usually tectonic plates beneath them either pushing against or pulling away from one another. Take for instance the Cascade Mountain Range in Northern California and stretches through Oregon and into Vancouver, British Columbia and sits northeast of the San Andreas Fault line that runs 750 miles through California. This fault creates the tectonic boundary between the…

The great Crater Lake in Oregon was once a stratovolcano named Mount Mazama. Mount Mazama had a very catastrophic pyroclastic eruption that produce about 12 cubic miles of magma. The Mount Mazama volcano has been recorded as one of the largest volcano eruption that has taken place in the last 10,000 years. The Mount Mazama volcano was one of the major volcanoes at the Cascade Range. The range of Mount Mazama’s summit was roughly between 11,000 and 12,000 prior to its climatic eruption. The…

The purpose of this paper is the explain a natural phenomena, Axial Seamount. Even if the reader has no knowledge of Axial Seamount, they will be able to fully understand the content of this paper. They will learn facts about Axial Seamount such as what it is, on what plates it is located on, what landforms are around it, etc. Axial Seamount is an underwater volcano located in the Northeastern Pacific Ocean, about 483 kilometers (300 miles) off the coast of Oregon. Because its frequent volcanic…

Mt. St. Helens is a stratovolcano part of a group of volcanoes called The Ring of Fire. These are created from the convergence/subduction between the Juan De Fuca plate and the North American plates. Its most common type of eruption is intermediate eruptions, which is what the composition was in its most recent eruption. Mt. St. Helens most recently erupted on May 18, 1980. An earthquake right under the mountain caused an enormous landslide/avalanche going close to 150 mph. A huge hazard from…

Volcanoes are mountains that can erupt to spew molten rock everywhere. A volcano can be formed in different ways like hotspots or tectonic plates. The tectonic plates can form volcanoes by forming convergent or transform boundaries. A convergent boundary is when two tectonic plates collide into each other, forming mountains. The transform boundaries form mountains when they slide into one another. Hotspots are formed when the magma is forced up to the Earth's surface. Before Mount St. Helens…

the Upper Basin. The climate in the Upper Klamath Basin varies with changes in elevation, but it is typically dry with precipitation falling in the winter season (Taylor and Bartlett 1993). Average annual precipitation in the lower basin is 14 inches, but can reach as high as 100 inches in some areas of the Eastern Cascades Muedeking 2008).The largest water feature is Klamath Lake, which is approximately 270 square Kilometers and has an average depth of 2.8 meters though it can get as shallow as…

Mount St. Helens is a volcanic stratovolcano still actively located in the Cascade Range in Western North America in the state of Washington. It was formed by a subduction plate boundary also located on the Juan de Fuca plate. The Cascade range is one of the most famous mountain ranges, and has one of the most active volcanos located in Western North America. Other areas or famous landmarks surrounding Mount St. Helens are the South Fork Toutle River, North Fork Toutle River, Castel lake,…