... CoronalHole O iii & Mg ix data of various transient features Further information about Armagh Observatory, and in particular the current Solar Physics re- search programme, may be obtained by consulting the Observatory's web-site http://star.arm.ac.uk ...
... The source of all these geomagnetic effects is the solar plasma that reaches the Earth magnetosphere; this is in the form of high-energy solar particles that may originate from solar flares, eruptive prominences, coronal mass ejections or coronalholes. ...
... The source of all these geomagnetic effects is the solar plasma that reaches the Earth magnetosphere; this is in the form of high-energy solar particles that may originate from solar flares, eruptive prominences, coronal mass ejections or coronalholes. ...
... The temporal series SER150W sequence was run in December 2002 in the North polar region, during a period when the coronalhole at the poles were ill-defined. ...
... spicules may be associacteristic speed given by this formula, a TI travels a distance ated with blinkers, and most probably observed at the boundof 195 km over 20 s, which is the integration time of the aries of unipolar magnetic regions (coronalholes ...
... In this context, some spicules may be associ ated with blinkers, and most probably observed at the bound aries of unipolar magnetic regions (coronalholes). ...
... These densities are consistent from the values derived by Doschek et al. (1997) for their quiet Sun observations but approximately a factor of 2--3 higher than their coronalhole results. ...
... High-energy solar particles originating from flares as well as from other solar activity phenomena (eruptive prominences, CMEs and coronalholes) can produce geomagnetic disturbances on Earth if they arrive at and interact with the magnetosphere. ...