Solar Geoeffective Event of 4 November 2001

16:20 UT, 3B/X1.0, AR 9684 (N06 W18), halo CME,
GLE, J(>10 MeV)~3000 p.f.u., Dst~-300 nT

General picture ;   GOES soft X-raysYohkoh/SXT: from sigmoid to arcade

 Protons ;    Geomagnetic stormGLE and Forbush decrease

H-alpha

Halo CME

CORONAS, 171 Å ;   11:01 and 17:03 UT ;    11:01 and 20:13 UT  

CORONAS, 304 Å ;   11:01 and 17:03 UT ;    11:01 and 20:13 UT