Viewing archive of söndag, 1 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 01 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 092 publicerat klockan 2200Z på 01 Apr 2012IA. Analys av solfläcksgrupper och solaktivitet från 31-2100Z till 01-2100Z Solar activity was very low. Only minor B-class/Sf
flares were observed, one from Region 1444 (N21W86) at 31/2107 and
from 1450 (N17E22) at 01/1454Z. The event from Region 1444 was
associated with a narrow eruption visible in SDO/AIA 304 imagery.
The ejecta is not expected to be geoeffective. The remaining
regions were quiet and magnetically simple.
IB. Prognos för solaktivitet
Solar activity is expected to be very
low to low with a slight chance for a C-class flare for the first
two days of the period (02-03 April). The probability of a C class
event increases on Day 3 (04 April) with the anticipated return of
Old Region 1434 (S22 L=207).
IIA. Sammanfattning av geofysisk aktivitet 31-2100Z till 01-2100Z
The geomagneic field was quiet. Solar wind speed measured at the ACE
spacecraft gradually declined from around 380 km/s at the beginning
of the period to about 320 km/s by the end. At approximately
01/0800Z, ACE indicated a solar sector boundary crossing to a
negative orientation accompanied by increased density and slight (-5
nT) southward Bz.
IIB. Prognos för geofysisk aktivitet
The geomagnetic field is
expected to begin the period at quiet levels. On Day 3 (04 April),
it will become unsettled with the possiblity of an isolated active
period as a coronal hole high speed stream becomes geoeffective.
III. Chans för solutbrott från 02 Apr till 04 Apr
| M-klass | 05% | 05% | 10% |
| X-klass | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observerad 01 Apr 107 Prognoserat 02 Apr-04 Apr 110/115/125 90 Day Mean 01 Apr 118
V. Geomagnetiskt A-index
Observerad Afr/Ap 31 Mar 004/004 Förväntat Afr/Ap 01 Apr 006/006 Prognoserat Afr/Ap 02 Apr-04 Apr 006/005-006/005-007/008
VI. Chanser för geomagnetisk aktivitet från 02 Apr till 04 Apr
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 05% | 05% | 10% |
| Små stormförhållanden | 01% | 01% | 01% |
| Svåra stormförhållanden | 01% | 01% | 01% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 15% | 20% |
| Små stormförhållanden | 15% | 15% | 25% |
| Svåra stormförhållanden | 05% | 05% | 15% |
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