Explore the eruption of Axial Seamount, on the Juan de Fuca Ridge by linking to

Question

Explore the eruption of Axial Seamount, on the Juan de Fuca Ridge by linking to the following:

Go to: http://axial2013.blogspot.com/2013/08/where-is-axial-seamount.html and answer the following:

1. What type of plate boundary is a mid-ocean ridge like this?

2. Using information from the video and what you already know about plate boundaries, describe the earthquake, volcano, bathymetric, and age data you would expect to characterize the plate boundary associated with Axial Seamount. What are some other characteristics about this plate boundary?

Earthquake characteristics (size/depth):

Volcanism characteristics (erupted products, distance affected):

Hazards to humans (how are humans affected - at what scale?)

Other characteristics:

Go to http://axial2013.blogspot.com/2013/08/axial-caldera.html, developed for the 2013 expedition to Axial Seamount. Read the blog entry, watch the short video clip and consider the following:

3. Chadwick talks about the pressure sensors that are installed on the ocean floor to detect “inflation” and “deflation” of the Axial Seamount volcano during an eruptive event. What do you think the idea of “inflation” and “deflation” events means?

Read the blog entry and watch the videos about the 2011 eruption at Axial Volcano on the Juan de Fuca Ridge at: http://axial2013.blogspot.com/2013/09/2011-lava-flows.html

4. What are some of the hazards associated with this activity on the divergent plate boundary? Even if hazards are not discussed explicitly, what do you think the hazards are? Explain your answer.

5. Using information from the video and what you already know about plate boundaries, describe the earthquake, volcano, bathymetric, and age data you would expect to characterize the plate boundary associated with Axial Seamount. What are some other characteristics about this plate boundary?

Earthquake:

Volcano:

Bathymetric:

Age:

Explanation / Answer

1-Mid Oceanic Ridge is a divergent plate boundary type.When two plate diverge from each other then some space is created in between the two plate. The space is filled by upwelling volcano and created mid Oceanic Ridge.

2-Plate boundary are three types,these are convergent, divergent and transform boundary. In case of Convergent boundary,two plate move towards each other andcollision occurs,subduction zone form,Formation of volcanic arc,island arc taking place.older crust is destroyed in this process.

In case of divergent plate boundary,two plates move away from each other and formation of mid Oceanic Ridge taking place.new crust is created in this process.

In case of transform plate boundary,two plates are sliding passed each other.crust is neither created nor destroyed.the relative motion of the plate is horizontal.

An earthquake is the shaking of the surface of the Earth resulting from the sudden release of energy in the Earth crust that create seismic waves which causes earthquake and damage. Earthquake can be of different magnitude 0 to 10 and classified on the different basis.Earthquake are characterised on the basis of side and depth i.e, shallow focus Earthearth, intermediate focus earthquake and deep focus earthquake.

A volcano is the rupture on the Earth crust that allows hot lava, volcanic ash and gases to escape from Magma chamber below the surface.

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