"Taken from the VIIRS instrument aboard NASA's most recently launched Earth-observing satellite - Suomi NPP, this composite image uses a number of swaths of the Earth's surface taken on January 4, 2012." Original size: 8000 x 8000.

"The Schumann resonances (SR) are a set of spectrum peaks in the extremely low frequency (ELF) portion of the Earth's electromagnetic field spectrum. Schumann resonances are global electromagnetic resonances, excited by lightning discharges in the cavity formed by the Earth surface and the ionosphere." from Wikipedia.

The Earth Observatory’s mission is to share with the public the images, stories, and discoveries about climate and the environment that emerge from NASA research, including its satellite missions, in-the-field research, and climate models.