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Atlantic storm Klaus increases neutron flux at ground level!
Monday 26 January 2009
by Jean-Luc Autran
popularity : 7%

(Image Meteo-France)

The winter storm, called Klaus, that passed through southern France and northern Spain in the day on Saturday 24 January 2009, has caused very significant damages....and a dramatic drop in air pressure on its way during several hours.

This sudden decrease of the air pressure mechanically induced a dramatic increase of the atmospheric neutron flux at ground level, as recorded by the Plateau de Bure Neutron Monitor (PdBNM).

The picture below shows a peak approaching +30% in the averaged neutron flux with respect to standard conditions (usually around 300000 counts/h).

Find and download all the PdBNM data in the "neutron monitor" section of this site!

Download the file: