Viewing archive of lördag, 28 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 28 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 119 publicerat klockan 2200Z på 28 Apr 2012IA. Analys av solfläcksgrupper och solaktivitet från 27-2100Z till 28-2100Z Solar activity was at low levels due to single,
low-level C-class events from Regions 1461 (N10W89), 1466 (N12W51),
1467 (N12E18), 1469 (S19E14) and new Region 1470 (S17E61). New
Region 1471 (S23E70) was also numbered during the period. A 16
degree filament eruption was observed in SDO/AIA 304 imagery at
28/1045Z. During the period of the eruption, the SE to NW oriented
filament was centered near S32W33. LASCO/C2 imagery observed an
associated slow-moving, non-Earth directed CME lifting off the SW
limb at 28/1224Z.
IB. Prognos för solaktivitet
Solar activity is expected to be low
with a slight chance for M-class activity for the next three days
(29 April - 01 May).
IIA. Sammanfattning av geofysisk aktivitet 27-2100Z till 28-2100Z
The geomagnetic field was at quiet to unsettled levels with an
isolated high latitude active period between 28/0900 - 1200Z.
Through the period, ACE solar wind velocities steadily decreased
from about 490 km/s to near 420km/s while the Bz component of the
interplanetary magnetic field was variable between +/-4 nT. The
greater than 2 MeV electron flux at geosynchronous orbit was at high
levels throughout the period.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field is
expected to be at predominately quiet levels for days one and two
(29 - 30 April). By day three (01 May), quiet to unsettled levels,
with isolated active periods, are expected as a coronal hole high
speed stream moves into a geoeffective position.
III. Chans för solutbrott från 29 Apr till 01 May
| M-klass | 20% | 20% | 20% |
| X-klass | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observerad 28 Apr 121 Prognoserat 29 Apr-01 May 125/120/120 90 Day Mean 28 Apr 112
V. Geomagnetiskt A-index
Observerad Afr/Ap 27 Apr 007/008 Förväntat Afr/Ap 28 Apr 005/005 Prognoserat Afr/Ap 29 Apr-01 May 004/005-004/005-007/008
VI. Chanser för geomagnetisk aktivitet från 29 Apr till 01 May
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 10% | 10% | 15% |
| Små stormförhållanden | 01% | 01% | 05% |
| Svåra stormförhållanden | 01% | 01% | 01% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 10% | 10% | 20% |
| Små stormförhållanden | 01% | 01% | 05% |
| Svåra stormförhållanden | 01% | 01% | 01% |
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Rymdvädersfakta
| Senaste X-utbrottet | 2024/05/03 | X1.6 |
| Senaste M-utbrottet | 2024/05/03 | M4.4 |
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| Fläckfria dagar | |
|---|---|
| Senaste dag utan solfläckar | 2022/06/08 |
| Månadsvis faktiskt antal solfläckar | |
|---|---|
| april 2024 | 136.5 +31.6 |
| Last 30 days | 153 +57.6 |