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The average optical energy flux ( UV, visible, Infrared, with a blackbody spectrum around 5778K ) reaching the earth at 1AU (149.6e9 meters from the sun ) is 1366 W/m² in space, varying from [[https://en.wikipedia.org/wiki/Solar_cycle#/media/File:Solar-cycle-data.png | 1365.5 to 1366.5 W/m² ]] over the 11 year solar cycle. The average radius of the earth is R = 6371.0 kilometers, so the area facing the sun is πR² or 1.275e14 m². Multiplied by the 1366 W/m² flux, that's 1.742e17 W or 174 petawatts. The average optical energy flux ( UV, visible, Infrared, with a blackbody spectrum around 5778K ) reaching the Earth at 1AU (149.6e9 meters from the sun ) is 1366 W/m² in space, varying from [[https://en.wikipedia.org/wiki/Solar_cycle#/media/File:Solar-cycle-data.png | 1365.5 to 1366.5 W/m² ]] over the 11 year solar cycle. The mean (average) radius of the Warth is [[ https://en.wikipedia.org/wiki/Earth | R = 6371.0 km ]], so the area facing the sun is πR² or 1.275e14 m². Multiplied by the 1366 W/m² flux, that's 1.742e17 W or 174 petawatts.

Solar Energy Intercepted by the Earth

S1.7e17


The average optical energy flux ( UV, visible, Infrared, with a blackbody spectrum around 5778K ) reaching the Earth at 1AU (149.6e9 meters from the sun ) is 1366 W/m² in space, varying from 1365.5 to 1366.5 W/m² over the 11 year solar cycle. The mean (average) radius of the Warth is R = 6371.0 km, so the area facing the sun is πR² or 1.275e14 m². Multiplied by the 1366 W/m² flux, that's 1.742e17 W or 174 petawatts.

S1.7e17 (last edited 2015-12-13 05:04:40 by KeithLofstrom)