Viewing archive of Thursday, 18 October 2012
Solar activity report
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.
Report of Solar-Geophysical Activity 2012 Oct 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 292 Issued at 2200Z on 18 Oct 2012IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z Solar activity was very low. The x-ray background
remained steady at B4 for the duration of the period. Newly
numbered Region 1596 (N11E73) is a ~300 millionths E-type group and
is the most prominent region on the disk. New Region 1597 (S21W30)
emerged as a small bi-polar region. The other regions on the disk
were stable or decaying.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a slight chance for an isolated M-class event during the next
three days (19 - 21 Oct).
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic field was quiet during the past 24 hours. The solar
wind speed measured at the ACE spacecraft gradually increased from
around 500 km/s to the end-of-day value around 600 km/s. These
signatures are consistent with a high speed stream from a negative
polarity coronal hole. The greater than 2 MeV electron flux at
geosynchronous orbit was at high levels throughout the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet with a chance for an isolated unsettled period
for the next two days (19 - 20 Oct). The geomagnetic field is
expected to be mostly unsettled on 21 Oct due to a high speed stream
associated with a negative polarity coronal hole.
III. Event Probabilities 19 Oct to 21 Oct
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Oct 138 Predicted 19 Oct-21 Oct 140/140/140 90 Day Mean 18 Oct 119
V. Geomagnetic A Indices
Observed Afr/Ap 17 Oct 006/006 Estimated Afr/Ap 18 Oct 004/005 Predicted Afr/Ap 19 Oct-21 Oct 006/006-006/005-007/008
VI. Geomagnetic Activity Probabilities 19 Oct to 21 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 15% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
Latest news
Sunday, 8 December 2024
X2.2 solar flare, SDO outage
Thursday, 21 November 2024
Major far side eruption, S1 radiation storm
Monday, 11 November 2024
Coronal hole faces Earth
Latest forum messages
Unspecified geomagnetic activity 1749Strong far side CME 327Power transmission for all of us. And why I believe we are better prepared than ever for major solar events 9Filaments and prominences 595Incoming & Unnumbered Active Regions 1351
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Space weather facts
| Last X-flare | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/22 | M1.0 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2024 | 152.5 -13.9 |
| December 2024 | 103.3 -49.2 |
| Last 30 days | 115.4 -40.8 |