Wednesday, June 16, 2010

Earth Measurements

Earth Measurements

Layer

Thickness
(km)

Density
(g/cm³ )

P-wave velocity
(km/sec)

Continental crust

avg. 35

2.6 - 2.8

6

Oceanic crust

5 - 12

3.0 - 3.5

7

Mohorovicic discontinuity (Moho)

Mantle

2885

4.5 - 10

8 - 12

Gutenberg discontinuity

Core (average)

3470

10.7 or 12

-

Outer core
(liquid)

2250

-

8 - 10

Inner core
(solid)

1220

13.5

11 - 12

Mean radius

6,371.1 km

Mass

5.976×1024 kg

Equatorial radius

6,378.2 km

Density

5.517×102 kgm-3

Equatorial diameter

12,756.5 km

Volume

1.083×1021 m3

Polar radius

6,356.9 km

Gravity

9.812 ms-2

Polar diameter

12,713.8 km

Average height

875 meter above sea level

Equatorial circumference

40,087.3 km

Greatest height(Mountain Everest)

8,840 meter above sea

level

Meridional circumference

39,999.7 km

Lowest point of earth’s land

Surface(shores of Dead sea)

396.2 meter below sea level

Total surface area

510 millions of km2

Average depth

3,794 meter below sea level

Land area

149 millions of km2

Greatest depth(Mariana trench)

10,430 meter below sea level

Ocean area

361 millions of km2

Average density

5.52 g/cm3

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