Viewing archive of fredag, 20 april 2012
Solaktivitetsrapport
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Rapport för sol- och geofysisk aktivitet 2012 Apr 20 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 111 publicerat klockan 2200Z på 20 Apr 2012IA. Analys av solfläcksgrupper och solaktivitet från 19-2100Z till 20-2100Z Solar activity was low. New Region 1465 (S17E39 -
Dao/beta) emerged early in the period and showed significant growth.
It produced occasional C-class flares including a C1/1f
parallel-ribbon flare at 20/1501Z. Regions 1459 (S16E01 - Dai/beta),
1460 (N15W15 - Dkc/beta), and 1462 (S25W46 - Dho/beta) also showed
significant growth during the period. Region 1462 produced an
isolated C-class flare as it grew. There were no Earth-directed CMEs
during the period.
IB. Prognos för solaktivitet
Solar activity is expected to be low
through the period (21 - 23 April) with a chance for an isolated
M-class flare.
IIA. Sammanfattning av geofysisk aktivitet 19-2100Z till 20-2100Z
Geomagnetic activity was at quiet to unsettled levels with brief
active periods at high latitudes. ACE solar wind data indicated the
minor increase in activity was due to a solar sector boundary
crossing (SSBC) at approximately 20/0700Z. The SSBC was associated
with increased IMF Bt (maximum 8 nT at 20/1059Z) and a period of
sustained southward IMF Bz (maximum deflections to -7 nT around
20/0400Z).
IIB. Prognos för geofysisk aktivitet
Geomagnetic field activity is
expected to be at quiet levels during the first half of day 1 (21
April). Activity is forecast to increase to unsettled levels with a
chance for active levels beginning around 21/1500Z and continuing
into day 3 (23 April) due to expected glancing blows from the
partial-halo CMEs observed on 18 and 19 April. There will also be a
slight chance for minor storm levels on day 1.
III. Chans för solutbrott från 21 Apr till 23 Apr
| M-klass | 30% | 30% | 30% |
| X-klass | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observerad 20 Apr 142 Prognoserat 21 Apr-23 Apr 150/150/150 90 Day Mean 20 Apr 112
V. Geomagnetiskt A-index
Observerad Afr/Ap 19 Apr 005/005 Förväntat Afr/Ap 20 Apr 007/007 Prognoserat Afr/Ap 21 Apr-23 Apr 014/015-011/012-010/012
VI. Chanser för geomagnetisk aktivitet från 21 Apr till 23 Apr
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 25% | 20% | 20% |
| Små stormförhållanden | 10% | 05% | 05% |
| Svåra stormförhållanden | 01% | 01% | 01% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 30% | 25% | 25% |
| Små stormförhållanden | 15% | 10% | 10% |
| Svåra stormförhållanden | 05% | 01% | 01% |
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Rymdvädersfakta
| Senaste X-utbrottet | 2024/03/28 | X1.1 |
| Senaste M-utbrottet | 2024/04/19 | M1.0 |
| Senaste geomagnetiska stormen | 2024/04/19 | Kp7 (G3) |
| Fläckfria dagar | |
|---|---|
| Senaste dag utan solfläckar | 2022/06/08 |
| Månadsvis faktiskt antal solfläckar | |
|---|---|
| mars 2024 | 104.9 -19.8 |