Viewing archive of Saturday, 19 May 2001
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 2001 May 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 139 Issued at 2200Z on 19 May 2001IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity was low. Only occasional C-class flares
occurred during the period. The largest event was an optically
uncorrelated C6 flare at 19/1438 UTC. This was accompanied by a Type
II radio sweep (470 km/s). Although imagery was non-conclusive, it
appears that this event originated in Region 9455 (S17W90+) which
was at or near the west limb at the time. A non-earth directed
coronal mass ejection from this event was detected by the LASCO/SOHO
spacecraft. Two new regions were numbered, 9463 (N07E70) and 9464
(S11E70).
IB. Solar Activity Forecast
Solar activity is expected to be low
with a slight chance of isolated M-class events.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic field was quiet to active. The greater than 2 MeV
electron flux at geosynchronous orbit reached moderate levels during
the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled. The greater than 2 MeV electron
flux can be expected to reach moderate levels during the forecast
period.
III. Event Probabilities 20 May to 22 May
| Class M | 30% | 30% | 30% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 May 141 Predicted 20 May-22 May 135/130/130 90 Day Mean 19 May 168
V. Geomagnetic A Indices
Observed Afr/Ap 18 May 011/011 Estimated Afr/Ap 19 May 012/012 Predicted Afr/Ap 20 May-22 May 008/012-008/012-008/010
VI. Geomagnetic Activity Probabilities 20 May to 22 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
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 |