Question

1. compare and contrast the three different volcanoes you examined in questions 3 - 5 above. how and why do they differ in terms of their tectonic location, eruption style, and hazards associated with the eruption? 2. now that youve evaluated multiple volcanoes, imagine you were tasked with communicating with the people that live near the volcanoes you examined. considering the hazards associated with an actively erupting volcano, answer the following questions. i. what would you tell people that live near an actively erupting shield volcano to do? what hazards and risks would you say are most important for them to know? would you urge them to evacuate? why or why not? ii. what would you tell people that live near an actively erupting stratovolcano to do? what hazards and risks would you say are most important for them to know? would you urge them to evacuate? why or why not?

Explanation:

1. For the first part, tectonic location affects magma type and thus eruption style. Shield volcanoes often form at hot - spots or divergent boundaries, have low - viscosity lava and effusive eruptions with hazards like lava flows and minor ashfall. Stratovolcanoes form at convergent boundaries, have high - viscosity magma leading to explosive eruptions with hazards like pyroclastic flows, ash clouds, and lahars.
2. i. For a shield volcano, advise people to stay informed via local authorities. Lava flows are a major risk, but they are usually slow - moving. Evacuation may not always be necessary immediately as long as they are not in the direct path of lava flows.

ii. For a stratovolcano, urge immediate evacuation as pyroclastic flows can travel at high speeds and be extremely dangerous. Ashfall can also cause respiratory problems and damage infrastructure. Hazards like lahars (mudflows) can occur after heavy rain due to volcanic ash and debris.

Answer:

1. Shield volcanoes and stratovolcanoes differ in tectonic location (hot - spots/divergent vs. convergent), eruption style (effusive vs. explosive), and associated hazards (lava flows/minor ashfall vs. pyroclastic flows, ash clouds, lahars).
2. i. Stay informed, be aware of lava flow hazards. Evacuation may not be immediate if not in lava path.

ii. Evacuate immediately. Be aware of pyroclastic flows, ashfall, and lahars.