Home » General Knowledge » World Geography

Space weather (magnetic storms): What causes the initial increase of the Earth’s magnetic field during magnetic storms? Consider solar-wind–magnetosphere interactions and shock compression effects. Choose the correct cause.

Q: Space weather (magnetic storms): What causes the initial increase of the Earth’s magnetic field during magnetic storms? Consider solar-wind–magnetosphere interactions and shock compression effects. Choose the correct cause.

Concept The initial phase of a magnetic storm often shows a brief increase in geomagnetic field strength caused by compression of the magnetosphere by interplanetary shocks embedded in the solar wind.

Difficulty: Easy

When the shock wave, associated with gusty solar wind, compresses the magnetosphere
When there is a large decrease in field intensity
When the gust wind itself engulfs the magnetosphere
None of the above

Correct Answer: When the shock wave, associated with gusty solar wind, compresses the magnetosphere

Explanation:

Concept
The initial phase of a magnetic storm often shows a brief increase in geomagnetic field strength caused by compression of the magnetosphere by interplanetary shocks embedded in the solar wind.

← Previous Question Next Question→

More Questions from World Geography

Continents (world geography): Which is the largest continent by area? Use the standard continental area rankings used in geography. Choose the correct continent.
Atmospheric absorption (greenhouse gases): The Sun’s infrared radiation is strongly absorbed by which gases in the Earth’s atmosphere? Identify the key IR-absorbing constituents among the choices. Choose the correct option.
Volcanology (eruption style): Which is the least explosive type of volcano among the options listed? Compare typical eruption styles of the given volcanic forms. Choose the correct type.
Indian industries (paper): Which Indian state has traditionally led in paper production among the options given? Use standard GK referencing of paper industry clusters and mills. Choose the correct state.
Australia (states and territories): Which is the island state of Australia? Identify the state separated from mainland Australia by Bass Strait. Choose the correct state.
South Asia (country names): The island nation of Sri Lanka was formerly known by which colonial-era name? Recall official renaming and historical usage in the 20th century. Choose the correct former name.
Upper atmosphere (ionosphere coverage): Which layers of the atmosphere are included within the ionosphere? Recognise that the ionosphere overlaps multiple high-altitude layers due to solar ionisation. Choose the most comprehensive option.
Mineralogy (classification): Minerals that chemically contain hydrocarbons belong to which group? Differentiate organic-bearing minerals from silicates/oxides/hydrides. Choose the correct group.
Soil science (shrink–swell clays): The heavy clay soils that show marked expansion when wet and contraction when dry are called what? Note: 'heavy day soils' in the prompt refers to heavy clay soils (typo clarified). Choose the correct soil order.
Oceanography (seafloor mapping): Our knowledge of ocean-basin topography has been obtained using which method(s)? Consider geophysical and acoustic techniques used to map the seabed. Choose the correct option.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion