Impulsive M2.4 solar flare peaked at 13:19 UTC
Impulsive M2.4 solar flare peaked at 13:19 UTC on August 17, 2012. The event started at 13:12 (B2.8) and ended at 13:23 (M1.0). The flare was centered around a new active region off the northeastern limb. This region is turning into view today.
| Beg | 17/1312 | B2.8 | |
| Max | 17/1319 | M2.4 | Int 6.9e-03 J m-2 |
| End | 17/1323 | M1.0 |
Minor ionization waves are rippling through our planet’s upper atmosphere. NOAA/SWPC issued Minor R1 Radio Blackout Alert. Weak or minor degradation of HF radio communication on sunlit side is possible, with occasional loss of radio contact as well as Low-frequency navigation signals could degraded for brief intervals.
Sunspot 1543 is turning away from Earth and is still crackling with impulsive C- and M-class solar flares. Geomagnetic field was at unsettled levels at short period reaching Geomagnetic K-index of 4.
The geomagnetic field is expected to be at quiet to unsettled levels for the next three days, with a chance for active levels. The disturbed conditions on August 17-18 are expected with the arrival of the CME from August 14. On August 19 a positive coronal hole high-speed stream should arrive and disturbed geomagnetic field again.
There is still 05% chance for another M-class, and 01% chance for X-class solar flare.
CURRENT CONDITIONS
Solar wind
speed: 385.9 km/sec
density: 0.1 protons/cm3
The Radio Sun
10.7 cm flux: 98 sfu
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 4 unsettled
Interplanetary Mag. Field
Btotal: 2.6 nT
Bz: 0.3 nT south
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