Cascadia subduction zone

earthquake in the Nisqually delta was caused by a mineral change, altering the volume and space between the plates. The aforementioned reasons are why the 2001 Nisqually was an intraplate earthquake. The cascadia subduction zone (or the convergent boundary between the North American plate and the Juan de Fuca plate), tends to have earthquakes of massive size and destruction. Theories have suggested their size and damage is due to the quakes change in length from half-subduction-zone to full-subduction-zones. Knowing that there have been drastically dangerous earthquakes in the Cascadia subduction zone, it is highly probable there are many more to come. This could cause the same or greater geological damage to not only the Puget sound area, but all of the west coast of North America. There were many geological disasters in the Puget Sound area in 2001. There were ground failures of all sorts: fault ruptures, landslides, avalanches, and liquefaction. Liquefaction was a great contribution to the increase in streamflow. The liquefaction aftermath also affected the soil of forests and damaged many buildings in the area. Other than that, there was a minimal amount of damage done to the natural habitat of those living in Puget Sound. The Nisqually earthquake has shed light on the dangers Of Cascadia. A field team in Oregon investigated the quake, drawing conclusions in terms of the future natural disasters that can and will occur. They also look at protection from secondary hazards…

Earthquake Case History: 2010 Mw = 8.8 Mega-thrust Earthquake, Maule, Chile 5/2/13 By Travis Eddy 1. Introduction In early 2010 central south Chile experienced a Mw = 8.8 earthquake and large tsunami waves that devastated areas on the Chilean Pacific coast, nearby offshore islands, and areas near the epicenter. In addition to the tsunami, the earthquake had many other geological consequences including aftershocks, terrestrial and submarine land-sliding, elevation changes, and a gravity…

Madagascar and the southern part of indian and another beneath the modern day Marion hotspot, of the southern coast of South Africa. The discovery of these two plumes are important evidence of reconstruction occurring around the Indian plate, including the Reunion island hotspot which propelled India northwards during the end of the Cretaceous period, resulting in the creation of the Deccan Traps. Forte and Gilsovic also found that there was a sleight area of penetration of a hot, lower in…

Dear US Geological Survey, I think that you should accept Alfred Wegener’s Theory of Continental Drift. There is a large amount of realistic evidence to prove that this theory did occur. Wegener’s theory is that all seven continents were once joined into a supercontinent called Pangaea. He believes that after continents were in that supercontinent, they gradually moved apart over more than a hundred years ago and will continue to move in the future. This Theory of Continental Drift is supported…

Sciencia is a world analogous to Eath. Based on the present day plate boundaries and similarities on multiple continents, It’s believed that the continents of Sciencia were once together as a supercontinent called Edisonia. The supercontinent held 6 of the 8 modern continents, which broke apart due to tectonic forces in the Lithosphere. Also, the 7th and 8th continents were believed to have formed from volcanic eruptions on convergent plate boundaries. The edges on the modern- day Sciencian…

and the speed of the plates varies. Sometimes they can be as slow as two centimeters per year, and other times they can move as fast as ten centimeters per year. The area where the two plates meet with each other is called a boundary. There are three distinct ways these boundaries move with each other. One the three types are called convergent boundaries. Convergent boundaries are anywhere where the two areas of land move toward one another, causing collision. Most collisions created by…

There are many different aspects in the world of geology. Something that I want to focus on are hydrothermal vents. Hydrothermal vents are like chimney shaped hot springs that are located on the ocean floor. Hydrothermal vents were first discovered in 1977 near the Galapagos Islands in the eastern Pacific. Scientists exploring the area along the mid-oceanic ridge had noticed drastic temperature changes in their data. With the help of ALVIN, a research deep sea submersible, they discovered vents…

Over the years, earthquakes have acted as one of the most lethal calamity in the world among other disasters. They have claimed millions of lives and numerous properties in the world since documentation of the earthquakes begun. Naturally, some areas have never experienced any earthquakes while other areas are said to be precisely in the hot zone where the probability of occurrence remains high. In the recent past, about 500,000 earthquakes are reported to happen every year. Of this, a human…

north equatorial current near Trinidad while the second branch turns southward and contin¬ues as Brazil warm current parallel to the east coast of South America. The South Equatorial current is basically generated under the force of trade winds. 3. Counter-Equatorial Current (Warm): The counter equatorial current flows in the opposite direction to the westward flowing strong north and south equatorial currents. This current is stronger in the east where it is called the Guinea Stream but is…

Which mountain building event does this correspond to on your sea level curve? Compression was a driving force as evidenced by the curvature in the cross-section of sediment. Such force could occur at convergent boundary, which could be where two continental crusts collide or the subduction of oceanic crust below continental crust. When two continental crusts collide compression forces crust to displace both up and down. In a subduction zone when an oceanic plate falls below a continental plate…