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پست‌های کانال
| 2 |  بدون متن... | 65 |
| 3 |  بدون متن... | 64 |
| 4 | Space Weather Message Code: ALTK04
Serial Number: 2694
Issue Time: 2026 Oct 23 1955 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Oct 23 1953 UTC
Synoptic Period: 1800-2100
Active Warning: YES
Comment:
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. | 87 |
| 5 | Space Weather Message Code: WARK04
Serial Number: 5443
Issue Time: 2026 Oct 23 1927 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Oct 23 1926 UTC
Valid To: 2026 Oct 24 0900 UTC
Warning Conditions: Onset
Comment:
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. | 90 |
| 6 |  بدون متن... | 96 |
| 7 |  بدون متن... | 96 |
| 8 |  بدون متن... | 111 |
| 9 | بدون متن... | 106 |
| 10 | :Product: Forecast Discussion
:Issued: 2026 Oct 23 1230 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity
.24 hr Summary...
Solar activity continued at low levels with the largest flare, a C3.3/Sf
at 23/0542 UTC from Region 4560 (N13W51, Eai/beta-gamma). The only other
active on the visible solar disk is Region 4557 (N07W75, Cao/beta), who
was responsible for few C-class flares, including a C1.3 at 23/0355 UTC
associated with an eruption observed first by GOES-19/SUVI and later by
the operational coronagraphs (first imagery from LASCO/C2 at 23/0428
UTC). Preliminary analysis indicate that the trajectory of this CME will
not intercept the Geospace.
No new Earth-directed CMEs were observed in available coronagraph
imagery.
.Forecast...
Solar activity is expected to remain at low levels through 25 Oct, with
a slight chance for isolated M-class flares (R1-R2, Minor-Moderate),
mostly due to the flare potential of Region 4560.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux reached high levels at 23/1140 UTC.
The greater than 10 MeV proton flux remained steady at background
levels.
.Forecast...
The greater than 2 MeV electron flux is expected to continue reaching
high levels on 23-25 Oct. The greater than 10 MeV proton flux is
anticipated to persist at background levels through 25 Oct.
Solar Wind
.24 hr Summary...
Solar wind parameters reflected diminishing positive polarity CH HSS
influences. Total magnetic field strength (Bt) was about 5 nT with a
north-south (Bz) component oscillating between -/+ 6 nT during the
period. Solar wind speeds slowly decreased from 450 km/s level to about
400 km/s late in the period. The phi angle remained predominantly in the
positive sector (away from the Sun).
.Forecast...
Undisturbed solar wind conditions are expected early 24 Oct with
enhancements returning on 25 Oct due to the combined influences of a
negative polarity CH HSS and possible glancing CME effects from the 21
Oct eruptions.
Geospace
.24 hr Summary...
The geomagnetic activity decreased from active to quiet levels during
the past 24h.
.Forecast...
Quiet to unsettled conditions are expected on 23 Oct as CH HSS
influences wane, transitioning to mostly quiet levels on 24 Oct. A
return to active levels, with a chance for geomagnetic storming, is
anticipated on 25 Oct due to low-confidence combined effects from a
recently emerged negative polarity coronal hole and potential glancing
CME impacts. | 123 |
| 11 |  بدون متن... | 104 |
| 12 |  بدون متن... | 108 |
| 13 | Space Weather Message Code: ALTEF3
Serial Number: 3755
Issue Time: 2026 Oct 23 1147 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu
Threshold Reached: 2026 Oct 23 1140 UTC
Station: GOES-19
Comment: | 114 |
| 14 |  بدون متن... | 130 |
| 15 |  بدون متن... | 131 |
| 16 |  بدون متن... | 141 |
| 17 | بدون متن... | 138 |
| 18 |  بدون متن... | 142 |
| 19 | بدون متن... | 141 |
| 20 | :Product: Forecast Discussion
:Issued: 2026 Oct 23 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity
.24 hr Summary...
Solar activity continued at low levels. There are two numbered sunspot
regions on the visible disk: Region 4557 (N07W68, Dao/beta) showed
modest new flux emergence in its intermediate spots following a period
of decay, producing a C1.4/Sf flare at 22/1733 UTC. Region 4560 (N13W42,
Eai/beta-gamma) was the primary driver of flaring, producing the largest
event of the period-a C3.5 flare at 22/0309 UTC. The region continued to
undergo flux emergence in its intermediate portions and briefly
developed a delta magnetic configuration alongside its mixed gamma
polarities.
No new Earth-directed CMEs were observed in available coronagraph
imagery.
.Forecast...
Solar activity is expected to remain at low levels through 25 Oct, with
a slight chance for isolated M-class flares (R1-R2, Minor-Moderate),
primarily due to the flare potential and ongoing development of Region
4560.
Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux was at moderate to high levels,
briefly exceeding the 1,000 pfu threshold for a single reading before
returning below high levels. The greater than 10 MeV proton flux
remained steady at background levels.
.Forecast...
The greater than 2 MeV electron flux is expected to reach high levels on
23-25 Oct in response to coronal hole high-speed stream (CH HSS)
influences. The greater than 10 MeV proton flux is anticipated to
persist at background levels through 25 Oct.
Solar Wind
.24 hr Summary...
Solar wind parameters reflected diminishing positive polarity CH HSS
influences. Total magnetic field strength (Bt) steadily declined over
the period, moving from 9 nT down to 5 nT. The North-South (Bz)
component exhibited multiple extended southward deflections, reaching
peak negative values between -5 nT and -7 nT. Solar wind speeds
gradually drifted downward from early values around 480-490 km/s to
around 430-440 km/s late in the period. The phi angle remained
predominantly positive (away from the Sun).
.Forecast...
Positive polarity CH HSS influences are anticipated to continue waning
through 23 Oct, returning to mostly background-like conditions by early
24 Oct. Enhancements are likely to return on 25 Oct due to the combined
influences of a negative polarity CH HSS and possible glancing CME
effects from the 21 Oct eruptions.
Geospace
.24 hr Summary...
The geomagnetic field reached mostly active levels due to ongoing
positive polarity CH HSS influences.
.Forecast...
Quiet to unsettled conditions are expected on 23 Oct as CH HSS
influences wane, transitioning to mostly quiet levels on 24 Oct. A
return to active levels, with a chance for geomagnetic storming, is
expected on 25 Oct due to low-confidence combined effects from a
recently emerged negative polarity coronal hole and potential glancing
CME impacts. | 136 |
