Investigation14

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Coconino Community College *

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Course

110

Subject

Geography

Date

Apr 3, 2024

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pdf

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3

Uploaded by EarlWildcat346

GLG 110 Natural Disasters Name: __________________________ Investigation 14 Flagstaff & Monitoring Instructions: Use the links to answer these questions. Part 1: Flagstaff Volcanoes 1. Visit https://macrostrat.org/map/#x=-111.6168&y=35.2305&z=9.5 and look around Flagstaff at the area covered by the yellow zone. What (basic) type of rocks are these? The types of rocks in the yellow zones are primarily volcanic rock and basilic rock. 2. Look here in Terrain view: https://www.google.com/maps/@35.5062771,- 111.6592659,12.89z/data=!5m1!1e4 Which type of volcano are these? The type of volcanos in the San Francisco volcano field are basilic cinder cones. 3. Look at the area northwest of Sunset Crater in Satellite view: https://www.google.com/maps/@35.3689356,-111.5176539,3134m/data=!3m1!1e3!5m1!1e4 Why is that area black? It is black because the lava scorched the land around it and it is left over cinder and volcanic ash. 4. Take a look at Elden Mountain: https://www.google.com/maps/@35.2496082,- 111.6237423,14z/data=!5m1!1e4 Which type of volcano did we say this was? The Elden Mountain is a lava dome volcano. 5. Take a look at this raised ring, called Dry Lake Volcano: https://www.google.com/maps/@35.1685794,-111.7172805,15z/data=!5m1!1e4 Take a guess what you think this could be. My guess is that it was once a caldera volcano. 6. Look carefully at the San Francisco peaks: https://www.google.com/maps/@35.3349066,- 111.6821875,13z/data=!5m1!1e4 It looks complicated, but was actually one single volcano. a. Describe the shape of Snow Bowl—the basin between the San Francisco peaks. Snowbowl appears to have once been a larger mountain and erupted violently and lost the peak in the process.
b. Does this remind you of a volcano you saw in Investigation 13? It reminds me of Mt. St. Helens from investigation 13. Part 2: Volcano Monitoring (Do this section after slides) 7. Visit the Hawaiian Volcano Observatory website: https://volcanoes.usgs.gov/observatories/hvo/ a. The alert color code goes green (normal), yellow (advisory), orange (watch), red (warning). Which volcano is at the highest alert level currently, and what is its alert level? Use the map and the list just below the map. Kilauea is at the highest alert and is at alert level yellow. b. In the “Current Alerts” list below the map, click the “Update” link for the volcano at the highest alert level. Summarize what you are able to understand from that update. I learned that seismic waves are used to indicate if a volcano is likely to erupt and that even though KIleuea isn’t likely to erupt, they still have to give it an advisory alert level because of some seismic activity. c. Go back to the main page and now click the name of that volcano. (e.g. https://www.usgs.gov/volcanoes/kilauea ) This map shows the locations of equipment used to monitor the volcano. Click the button at top right, click “Earthquakes”, and turn them on. Have there been any earthquakes here in the last 2 weeks (red/orange/yellow circles or look at the list)? Yes, there were 6 volcanos that happed just in the last 2 days. d. Look at two example earthquakes—what magnitude were they? The first one I looked at had a magnitude of 2.039 and the second one had a magnitude of 2.29. e. Click on a GPS station (blue star) to see the data graphs that appear. If no data appears in the box that pops up, select a different GPS station. Click the plot for the last 2 years (it should be on the right) to expand it. You will see 3 graphs—the bottom one is vertical motion. Has the elevation of this station gone up, gone down, or stayed the same in this time period? The elevation of the station has increased by nearly .25 meters.
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