Can someone help me with this lab for my natural hazards class (Q1-3)? Thank you
ID: 284398 • Letter: C
Question
Can someone help me with this lab for my natural hazards class (Q1-3)? 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.
Hit the ‘Simulate’ button and wait for the program to run.
Eruption Type: Violent Strombolian Wind Field: Constant from the West
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’.
(1) Sketch a representative number of isopachs in the space below. Where is tephra accumulation greatest?
Colima volcano (red triangle on the map)
(2) 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. (3) Was your prediction correct? Explain.
Explanation / Answer
answer- tephra is fragmental material that is produced by volcanic eruption. It is volcanic ash. Isopatch map are those imaginary lines that joints imaginary line of equal thickness of volcanic sediment. these are contour lines of equal thickness.
answer-colima volcano is most active and explosive volcano in mexico. It is prominent volcano of western mexican volcanic belt. the region is characterize by the lava dome and viscous lava is accumulated more tephra accumulation is greatest near the flank of the volcano. near the sides the volcanic vent the thickeness of these sediments (pyroclastic/ tephra deposit/ fall despoit// volcanic ash deposit) are greatest.
the wind blows from the north east to south west direction.