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VA2OM > SOLAR 14.04.25 11:20l 65 Lines 2855 Bytes #999 (0) @ WW
BID : 26740_VE2PKT
Read: GUEST
Subj: Solar and Geomagnetic Activity
Path: IW8PGT<IZ3LSV<IW0QNL<JH4XSY<N3HYM<K5DAT<VE2PKT
Sent: 250414/0919Z 26740@VE2PKT.#TRV.QC.CAN.NOAM LinBPQ6.0.24
:Product: Weekly Highlights and Forecasts
:Issued: 2025 Apr 14 0137 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
07 - 13 April 2025
Solar activity was at high levels on 12-13 April due to the rapid
growth and complexity of Region 4055 (N07 L=235, class/area Ekc/820
on 13 April). This region totalled 19 M-class flares during the
highlight period. The largest was an M3.2 flare at 1851 UTC on 13
April. Region 4048 (S16 L=279, class/area Fkc/460 on 07 April)
produced M-class activity as well. Other highlights included
filament activity in the south central portion of the disk. Two
filament eruptions were observed. The first was approximately 20
degrees long, centered near S20E20, and began erupting after
~12/2130 UTC. The second filament was approximately 12 degrees long,
centered near S22W09, and began erupting after ~13/0500 UTC. CME
signatures were observed in subsequent coronagraph imagery following
each event. Initial analysis and modeling indicated a likely
Earth-directed component, with anticipated arrival at Earth near
midday on 16 Apr.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was at
moderate to high levels on 07-13 Apr due to the influence of various
CH HSSs.
Geomagnetic field activity reached G1 (Minor) storm levels on 08-09,
and 12 April all due to influences from CH HSSs. Unsettled to active
levels were observed on the remaining days in the highlight period.
Forecast of Solar and Geomagnetic Activity
14 April - 10 May 2025
Solar activity is expected to be at moderate to high levels on 27
April - 10 May with the return of Region 4055. Low to moderate
levels are expected for the remainder of 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 moderate to high levels on 14-15, and 23-28 April,
03-10 May due to the influences of recurrent CH HSS activity.
Geomagnetic field activity is expected to be at G2 (Moderate) storm
levels on 16 April due to the anticipated arrival of a CME that left
the Sun on 13 April. G2 storm levels are expected again on 02 May
due to recurrent CH HSS influences. G1 (Minor) storm levels are
expected on 17 April, 01 May, and 05-06 May, all due to recurrent CH
HSS activity. Unsettled to active levels are expected on 14-15
April, 18 April, 22-23 April, 03-04 May, and 07-09 May, all due to
recurrent CH HSS activity as well. Quiet to unsettled levels are
expected for the remaining days in the outlook period.
73 de VA2OM, SYSOP of VE2PKT
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