Earth Quakes Informations - Measuring Earthquake Intensity
 

 

 
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Earth Quake Information - Measuring Earthquake Intensity
 

Measuring Earthquake Intensity

From the Inside Out
Scientists do not have very much information about the inside of Mars because there is very little movement in its crust. They use seismographs (earthquake recorders) and other instruments to determine what the inside of Earth is like and have guessed that our neighbor planet has a solid iron core and a thick crust of cooled rock.

The core is small in diameter and the crust makes up most of the planet (left, NASA/JPL). There are various bulges on the planet including the Tharsis Region where there was past volcanic activity. Find out more about the Tharsis Region of Mars on the Volcanoes page.

Scientists have been studying Earth for long enough to determine that it has four basic layers (right). It has a solid inner core surrounded by a liquid metal outer core. A mantle of solid rock covers the core and then the Earth's crust.

The Earth's Inner Core is about 5000° hot and about 1400 km in diameter. The Outer Core is liquid iron and nickel about 2100 km thick and produces the Earth's magnetic field. Mars has a very tiny magnetic field indicating a solid core. Dense rocks up to 3200 km thick make up the Mantle. The Crust is about 70 km thick and is made of minerals and sedimentary, igneous and metamorphic rock. We live on just the top few hundred meters of our 12,756.28 km diameter planet.

 
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