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VA2OM > SOLAR 28.07.25 11:25l 56 Lines 2093 Bytes #999 (0) @ WW
BID : 39102_VE2PKT
Subj: Solar and Geomagnetic Activity
Path: IZ3LSV<ED1ZAC<LU4ECL<LU9DCE<VE3CGR<VE2PKT
Sent: 250728/0915Z 39102@VE2PKT.#TRV.QC.CAN.NOAM LinBPQ6.0.24
:Product: Weekly Highlights and Forecasts
:Issued: 2025 Jul 28 0129 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# https://www.swpc.noaa.gov/content/subscription-services
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity
21 - 27 July 2025
Solar activity was at low levels. The largest flare was a C8.1/Sf at
24/0545 UTC from an unnumbered region located behind the west limb.
Region 4149 (N17, L=247, class/area Eko/280 on 25 Jul) produced a
C7.4/Sf at 25/0101 UTC. Several C-class flares were also observed
from several other regions during the highlight period. No
Earth-directed CME activity was observed.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at
high levels on 21-22 July and 24-27 July with a normal to moderate
period on 23 July. The maximum flux was 13,000 pfu observed at
21/1700 UTC.
Geomagnetic field activity reached G1 (Minor) storm levels on 22 and
23 July due to negative polarity CH HSS influence. Solar wind speeds
were elevated to as high as 737 km/s late on 23 July. The remaining
days were quiet to active levels due to weak negative polarity CH
HSS influence.
Forecast of Solar and Geomagnetic Activity
28 July - 23 August 2025
Solar activity is expected to be at mostly low levels with a chance
for M-class (R1-R2, Minor to Moderate) flares for the outlook
period.
No proton events are expected at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit is
expected to be at high levels on 28 July, 05-06 August and 10-23
August all due to recurrent CH HSS influences. Low to moderate
levels are expected on the remaining days.
Geomagnetic field activity is expected to be at active to G1 (Minor)
storm levels on 04 August, 07-14 August and 18-22 August due to
recurrent CH HSS effects. Quiet to unsettled levels are expected on
the remaining days of the outlook period.
73 de VA2OM, SYSOP of VE2PKT
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