EARTH SCIENCE
VOLCANOES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
there is a crater glow due to the presence of magma near the crater
|
|
|
cooling of vegetation around the volcano’s upper slope
|
|
|
ground contractions
|
|
|
increased steaming activity
|
|
|
decrease in the temperature of hot springs
|
Detailed explanation-1: -Notable precursors to an eruption might include: An increase in the frequency and intensity of felt earthquakes. Noticeable steaming or fumarolic activity and new or enlarged areas of hot ground. Subtle swelling of the ground surface. Small changes in heat flow.
Detailed explanation-2: -A volcanic precursor is any signal that could be associated with an impending eruption in a prospective forecasting framework. When magma moves through the crust, it may produce some changes in the geophysical and/or geochemical signal.
Detailed explanation-3: -Detailed Solution. The correct answer is option 4) i.e. Origin of magma due to the increasing melting point. A volcanic eruption is associated with the following process: The ascent of magma due to pressure from gases and vapor.
Detailed explanation-4: -Tune in the radio or television for volcano updates. Listen for disaster sirens and warning signals. Review your emergency plan and gather your emergency supplies. More items