|
vk3pa
Deceased
Australia
1714 Posts |
 Posted - 07 Jul 2006 : 06:42:32 AM
|
COMMENT: We are experiencing active solar conditions, possibly leading
to geomagnetic disturbances. This morning an M2.5 long duration event
(LDE) was recorded by GOES. Its start-peak-end times are
08:11-08:37-08:58 UT and it is still decaying. A post-eruptive arcade
(PEA) and dimmings near the active region are visible in EIT, and the
associated CME appeared at 08:54 UT in LASCO C2. We roughly estimate the
CME speed to be higher than 500 km/s. The CME itself seems to erupt to
the SW, nevertheless we can expect some geomagnetic disturbance from it
within 3 days. The high energy proton fluxes (>10MeV and >30MeV) are
enhanced from 9 UT onwards, but didn't reach the proton event threshold.
As the active region is turning near the west limb we have set a warning
condition for proton events.
At present geomagnetic conditions are again quiet, after the
active-minor storm interval induced by the transequatorial coronal hole.
The solar wind speed is still elevated at 600 km/s, but the IMF
intensity remains low around 4nT with a weak and oscillating Bz
component.
|
|
: We are experiencing active solar conditions, pos
