Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published October 1994 | Erratum + Published
Journal Article Open

Observations of vector magnetic fields in flaring active regions


We present vector magnetograph data of 6 active regions, all of which produced major flares. Of the 20 M-class (or above) flares, 7 satisfy the flare conditions prescribed by Hagyard (high shear and strong transverse fields). Strong photospheric shear, however, is not necessarily a condition for a flare. We find an increase in the shear for two flares, a 6-deg shear increase along the neutral line after a X-2 flare and a 13-deg increase after a M-1.9 flare. For other flares, we did not detect substantial shear changes.

Additional Information

© 1994 Kluwer Academic Publishers. Provided by the NASA Astrophysics Data System. Received 30 December 1993; Revised 12 July 1994. We thank Mr Marc Tamsky for helpful discussions. The study was supported by NSF grants INT-9206863 and ATM-9122023, by NASA grant NAGW-1972, and by ONR grant N00014-89-J-1069. HW acknowledges support from NASA grant NAG5-2090.


Erratum. Sol Phys 158, 205 (1995). https://doi.org/10.1007/BF00680843

Attached Files

Published - 1994SoPh__154__261C.pdf

Erratum - 1995SoPh__158__205C.pdf


Files (687.1 kB)
Name Size Download all
673.5 kB Preview Download
13.6 kB Preview Download

Additional details

September 15, 2023
September 15, 2023