latest current solar flare storm activity august 15 2013
Solar activity was at low levels. The largest event of the period, a
C2/Sf flare, erupted from Region 1818 (S07W07, Dki/beta) at 15/1756 UTC.
The region continued to exhibit a horizontal shear line and slight areal
growth over the period. The other region of interest, Region 1817
(S21W31, Ekc/beta-gamma-delta) exhibited some intermediate spot decay
but redeveloped intermixed magnetic fields including a weak delta within
the large leader spot. The region was responsible for a C1/Sf at 15/1835
UTC. Two new regions were numbered during the period; Region 1822
(S08E57, Dao/beta) rapidly evolved on the disk and Region 1823 (S07E72,
Hsx/alpha) rotated onto the disk. The remaining spot groups were either
stable or in slight decay. At about 14/2000 UTC, both SDO/AIA 304 and
GONG H-alpha imagery observed a 21 degree long filament eruption
centered near S28W70. At 14/2200 UTC, SOHO/LASCO C2 imagery observed
a slow-moving CME off the SW limb with a majority of the ejecta directed
just south of the ecliptic plane. WSA Enlil analysis indicated this CME
did not have an Earth-directed component.
.Forecast...
Solar activity is expected to remain low for the next three days (16 -
18 Aug) with a chance for M-class activity (R1-R2 Radio Blackouts).
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux at geosynchronous orbit was at
normal levels. The greater than 10 MeV proton flux at geosynchronous
orbit was at background levels.
.Forecast...
The greater than 2 MeV electron flux at geosynchronous orbit is expected
to be at normal to moderate levels, with a chance for high levels, for
the next three days (16 - 18 Aug). The greater than 10 MeV proton flux
at geosynchronous orbit is expected to be at background levels for the
next three days (16 - 18 Aug).
Solar Wind
.24 hr Summary...
Solar wind measurements at the ACE spacecraft were consistent with
coronal hole high speed stream (CH HSS) conditions as Earth remained
under the influence of (-) CH54. Winds speeds began the period at around
475 km/s and remained steady at this speed through about 15/1130 UTC. A
gradual rise was then observed to about 600 km/s through 15/1845 UTC
where speeds remained steady through the end of the period.
Interplanetary magnetic field (IMF) Bt varied between 4 nT and 11 nT
while the Bz component of the IMF varied between +11 to -9 nT. Phi was
in a predominately negative (toward) orientation through about 15/1000
UTC when it became variable between negative and positive (away).
.Forecast...
Solar wind conditions should continue to reflect CH HSS effects for the
next two days (16 - 17 Aug). Peak speeds are forecast to be in the 550
km/s to 600 km/s range as the bulk of CH54 becomes more geoeffective. By
day three (18 Aug), solar wind speeds are expected to slowly decrease as
CH HSS effects began to wane.
Geospace
.24 hr Summary...
The geomagnetic field was at quiet to active levels due to CH HSS
effects.
.Forecast...
The geomagnetic field is expected to be at quiet to unsettled levels
with isolated active periods on day one (16 Aug) as CH HSS effects
persist. Quiet to unsettled conditions are expected on day two (17 Aug)
becoming mostly quiet on day three (18 Aug) as CH HSS effects wane
.Forecast...
Solar activity is expected to remain low for the next three days (16 -
18 Aug) with a chance for M-class activity (R1-R2 Radio Blackouts).
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux at geosynchronous orbit was at
normal levels. The greater than 10 MeV proton flux at geosynchronous
orbit was at background levels.
.Forecast...
The greater than 2 MeV electron flux at geosynchronous orbit is expected
to be at normal to moderate levels, with a chance for high levels, for
the next three days (16 - 18 Aug). The greater than 10 MeV proton flux
at geosynchronous orbit is expected to be at background levels for the
next three days (16 - 18 Aug).
Solar Wind
.24 hr Summary...
Solar wind measurements at the ACE spacecraft were consistent with
coronal hole high speed stream (CH HSS) conditions as Earth remained
under the influence of (-) CH54. Winds speeds began the period at around
475 km/s and remained steady at this speed through about 15/1130 UTC. A
gradual rise was then observed to about 600 km/s through 15/1845 UTC
where speeds remained steady through the end of the period.
Interplanetary magnetic field (IMF) Bt varied between 4 nT and 11 nT
while the Bz component of the IMF varied between +11 to -9 nT. Phi was
in a predominately negative (toward) orientation through about 15/1000
UTC when it became variable between negative and positive (away).
.Forecast...
Solar wind conditions should continue to reflect CH HSS effects for the
next two days (16 - 17 Aug). Peak speeds are forecast to be in the 550
km/s to 600 km/s range as the bulk of CH54 becomes more geoeffective. By
day three (18 Aug), solar wind speeds are expected to slowly decrease as
CH HSS effects began to wane.
Geospace
.24 hr Summary...
The geomagnetic field was at quiet to active levels due to CH HSS
effects.
.Forecast...
The geomagnetic field is expected to be at quiet to unsettled levels
with isolated active periods on day one (16 Aug) as CH HSS effects
persist. Quiet to unsettled conditions are expected on day two (17 Aug)
becoming mostly quiet on day three (18 Aug) as CH HSS effects wane