Disclaimer: The following material is being kept online for archival purposes.

Although accurate at the time of publication, it is no longer being updated. The page may contain broken links or outdated information, and parts may not function in current web browsers.

A limiting height of quiescent prominences before eruption

Boris Filippov


We discuss the problem of a limiting height of quiescent prominences and the relation of this value to the photospheric magnetic field characteristics. In some papers the limiting height is assumed to be related to the strength of the magnetic field or its horizontal gradient. We note that in a model of inverse polarity filament, the equilibrium is stable only in the region where the photospheric magnetic field falls off with a height not faster than 1/h. Current-free magnetic field calculations are compared with the observed prominence heights. It is shown that a prominence height is in fact depends on the vertical gradient value and never exceeds the level where the power is equal to one in the power-low decrease of the magnetic field. This is a new way to predict prominence eruptions and CME.

   Authors: B.P. Filippov, O.G. Den.

  Organization: Institute of Terrestrial Magnetism, Ionosphere and
Radio Wave Propagation, Russian
Academy of Sciences
     Telephone: 7 095 334 0284
           Fax: 7 095 334 0124
        e-mail: bfilip@
       Address: IZMIRAN, Troitsk Moscow Region, 142092, Russia

Above is background material for archival reference only.

NASA Logo, National Aeronautics and Space Administration
NASA Official: Adam Szabo

Curators: Robert Candey, Alex Young, Tamara Kovalick

NASA Privacy, Security, Notices