As you learned in your previous courses and on the website linked in the lab ins

Question

As you learned in your previous courses and on the website linked in the lab instructions, volcanoes are one of nature’s most magnificent landforms, but the processes that form them can be very destructive. Most volcanoes are found near plate boundaries though they are also found at the center of tectonic plates such as those in Hawaii and Yellowstone National Park. In this exercise, you will use the overall shape and volcanic deposits displayed in Google Maps to identify the type of volcano near a community. You will then analyze possible hazards associated with that volcano. Finally, you will create a summary of possible threats that disaster management officials should consider when developing a disaster plan or hazard map for a city. First, you need to view some volcanic landforms in Google Maps. Copy and paste or the following coordinates into Google Maps. Use your observations of the size, shape and location of the volcano to identify its type (Stratovolcano, Shield Volcano, Cinder Cone). You may need to zoom in or out to view the entire volcano. Also, make use ‘3D’ control in the lower right of the Google Maps image to get a pseudo-3D perspective of the volcano. You can measure distances by right clicking on the image and select measure distance. View the following volcanoes and answer prompt in red. The negative in front of the Longitude Number means that the location is West of the prime meridian which goes through the Royal Observatory in Greenwich England. If the number was positive, the location would be East of the Prime Maridian. Q1/Mauna Loa, Hawaii, United States. (Latitude, longitude) = 19.475 -155.608 Indicate the type of volcano at this location and describe how you determined its type. 2/Lava Butte, Oregon, United States. (Latitude, longitude) = 43.918 -121.356 Indicate the type of volcano at this location and describe how you determined its type.

Explanation / Answer

This is the picture of the volcano given in the question:

Mt. Amukta is a stratovolcano which is also known as composite volcano. The volcano type was identified primarily by observing the shape, size, and slope of the volcano. The elevation of the volcano is around 3400 ft. Its cone is about 5.8 km in basal diameter and has a 0.4 km wide summit crater. The slope of the volcano is also quite steep. The size and slope of Mt. Amukta indicates that it is a stratovolcano. If we zoom into the side of the volcano and observe closely, we are also able to see layers like structure of hardened lavas which is also a characteristic of a stratovolcano. Stratovolcanoes generally form near subduction zone and Alaskan Islands (on which Mt. Amukta is situated) is near the Aleutian Trench. Therefore we can safely conclude that Mt. Amukta is a stratovolcano.

Following Hazards are possible in this region and they must be kept in mind while developing a hazard map:

1. Lava Flows and Lahars

2. Tephra falls and volcanic ashfall

3. Debris flow and avalanches caused due to structural collapse.

4. Volcanic Gas

5. Earthquakes (In case of subduction zone setting of the volcano)

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