Nobeyama Radioheliograph Event 19990724

EventID : 19990724
Keyword : preflare
Observer : KH
Start : 1999-07-24 02:00
End : 1999-07-24 06:21#
Position: S27E86
Maximum Correlation @17GHz (x10^-4) : --
Maximum Brightness Temperature @17GHz : 2.2e5
GOES: ---
NOAA Number: 8645

Preflare activity with an enhanced left-handed circularly polarized emission.

This AR (8645) first produced an M1.7/1N impulsive flare at 04:04 UTC, then a long duration M3.3 flare at 08:02 UTC (from Solar Terrestrial Activity Report).

FOV of the box is 314" x 314".

Time evolution of the maximum Tb in log scale.
The solid line shows Max (R+L) and the dotted line shows Max (R-L).
Data points are plotted every 10 min.

Stokes I (R+L) map in the box. The brightness is normalized to the Max Tb.

Mpeg movie