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This image taken on September 8 - shows no hurricanes, cyclones, or
tropical storms in the Atlantic, Pacific, or Indian Ocean basin. A total of
14 polar satellite images, also known as swaths, were taken at midday and
stitched together to create the stunning view.
There was plenty of cloud cover, however, and smaller storm systems in view.
In the eastern Pacific, remnants of tropical storm Lorena were breaking up near
the Baja Peninsula. In the eastern Atlantic, the pieces of a tropical depression
are seen starting to gather near the islands of Cape Verde.
By the next day, tropical storm Humberto would form.
The natural-colour images were acquired by the Visible Infrared Imaging
Radiometer Suite (VIIRS) on the Suomi National Polar-orbiting Partnership
(Suomi NPP) satellite.
This, however, was an extremely rare day of calm on Earth.
Last month, the U.S. National Oceanic and Atmospheric Administration
charted the 11,967 tropical cyclones that have occurred on Earth since
records began. By colouring how many times any storm track overlapped
another, certain patterns arise in the density of storms affecting a given
area. Cyclone tracks overlapped the most in the western Pacific and Bay
The resulting image revealed the world’s worst hit areas.
The frequency of storm overlaps was shown to be much lower in the
Western Hemisphere than in the Eastern Hemisphere. They also produced
a second map showing storm intensity. In contrast to the first image of
frequency, the Northwestern Atlantic showed a much greater spread of
strong storms, whereas in the Pacific the strongest cyclones seem to group
near the Philippines.
In its May and August 2013 outlooks, the National Hurricane Center
forecasted a 70 per cent chance of a 'more active than normal' season,
with 13 to 20 named storms and 7 to 11 hurricanes.
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