Neutron monitor
Videos
A neutron monitor is a ground-based detector designed to measure the number of high-energy charged particles striking the Earth's atmosphere from outer space. For historical reasons the incoming parti
An overview of the space environment shows the relationship between the sunspot cycle and galactic cosmic rays.
Ground Level Enhancement — September 1989.
Coronal mass ejection
Videos
A coronal mass ejection is a significant ejection of plasma mass from the Sun's corona into the heliosphere. CMEs are often associated with solar flares and other forms of solar activity, but a broadl
Neutron monitor
…are: Oulu, Inuvik, Moscow, Kerguelen, Apatity and Newark neutron monitors. Occasionally the Sun expels an enormous quantity of mass and energy in a "Coronal Mass Ejection" (CME). As this matter moves through the solar system, it suppresses the intensity of Galactic cosmic rays. The suppression was first reported by Scott…
When observed in white-light coronagraph imagery, CMEs sometimes resemble a light bulb, possessing a bright bulb-like outer shell surrounding a dark void and compact inner structure.
Photo from the International Space Station (ISS) of aurora australis during a geomagnetic storm on 29 May 2010. The storm was most likely caused by a CME that had erupted from the Sun on 24 May 2010, five days prior to the storm.