Can someone help me with this lab for my natural hazards class (Q1-4)? Thank you

Question

Can someone help me with this lab for my natural hazards class (Q1-4)? Thank you.

Tephra: Fragmental material produced by a volcanic eruption regardless of composition, fragment size or emplacement mechanism. Tephra fallout is also commonly referred to as volcanic ash.

For this lab you will utilize the Tephra2 online simulation tool available through Vhub.org.

You will need to create a Vhub account by going to (https://vhub.org) and clicking the ‘Register’ link in the upper right corner (its free and easy to do).

The Tephra2 tool calculates the sedimentation of tephra on the ground given a particular eruptive scenario. To access the tool, go to www.vhub.org. Hover your mouse over ‘RESOURCE WAREHOUSE’, and select ‘Online Simulation Tools’. Find and select ‘Tephra2: Student Version” from the Resources column. Alternatively the direct link is https://vhub.org/tools/tephra2edu. (you make have to use google chrome or internet explorer) Then Click the ‘LAUNCH TOOL’ button to begin using this resource. Select English as language, then read the notes that appear. Click to advance to the inputs page.

You may select whatever eruption type you like. Select one of the two constant wind fields while leaving all other parameters at their defaults. (If you have already altered the defaults, simply close the application and re-launch the tool). Hit the

‘Simulate’ button and wait for the program to run.

(1) Eruption Type: ___________________   Wind Field: __________________________________

The code provides multiple outputs. After you run a simulation you can switch between these using the tab at the right hand side of the results box.

Select the ‘Isopach Map: No Topography’ window. Note that this option plots only the area over which calculations were made while the map with topography has a constant, pre-defined size. The contour lines on this plot are called ‘isopachs’.

(2) Sketch a representative number of isopachs in the space below. Where is tephra accumulation greatest?

Colima volcano (red triangle on the map)

(3) Predict how the accumulation of tephra will change if you select the other constant wind field. Draw your prediction below.

Wind Field: _____________________________________

Colima Volcano

Clear your result by selecting the ‘clear’ button in the lower right corner. Return to the inputs section by selecting ‘Inputs’. Run the simulation again, this time selecting the other constant wind field. (4) Was your prediction correct? Explain.

Explanation / Answer

Answer:1

General information from the simulation tool:

Volcano name: Campi flagrei

Code: 0101-01=

Volcano coordinates: 40.827 and 14.139

Answer: 2

The isopach map could not be generated by the tool(error shown by the simulation tool), but one can easily find out the greatest accumulation as there would be the highest value of contour.

Answer:3

The accumulation of tephra would decrease as the distance increases from the vent of the volcano.

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