Viewing archive of Friday, 4 June 2010
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 2010 Jun 04 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 155 Issued at 2200Z on 04 Jun 2010IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z
Solar activity has been at very low levels for the past
24 hours. Region 1076 (S19W49) has decayed in white light areal
coverage but remains a beta magnetic classification. No flares were
observed. However, a full-halo CME was observed on LASCO C2 imagery
at 04/1202Z. The CME appears to be a backsided event and is not
expected to become geoeffective.
IB. Solar Activity Forecast
Solar activity is expected to be at
very low levels with a slight chance for C-class events for the next
three days (05-07 June).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
The geomagnetic field has been at quiet to active levels with an
isolated minor storm period from 0000Z-0300Z for the past 24 hours.
Solar wind data from the ACE spacecraft indicate the continuation of
a high speed solar wind stream with wind speeds around 550 km/s. The
greater than 2 MeV electron flux at geosynchronous orbit was at high
levels during the past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at unsettled levels with a chance for an isolated
active period for the first day (05 June) due to persistence and the
forecasted arrival of the CME observed on 31 May. Mostly quiet
conditions are expected on the second day (06 June). Quiet to
unsettled conditions are expected with a chance for active periods
on the third day (07 June) due to a coronal hole high-speed stream
moving into geoeffective position.
III. Event Probabilities 05 Jun to 07 Jun
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 Jun 072 Predicted 05 Jun-07 Jun 072/072/072 90 Day Mean 04 Jun 077
V. Geomagnetic A Indices
Observed Afr/Ap 03 Jun 013/013 Estimated Afr/Ap 04 Jun 012/015 Predicted Afr/Ap 05 Jun-07 Jun 010/010-005/005-008/010
VI. Geomagnetic Activity Probabilities 05 Jun to 07 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 15% | 30% |
| Minor storm | 10% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 35% |
| Minor storm | 15% | 05% | 15% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
Latest news
Tuesday, 15 April 2025
CME arrival, G3 storm watch
Friday, 28 March 2025
X1.1 solar flare
Monday, 24 March 2025
Coronal hole faces Earth
Latest forum messages
Unspecified geomagnetic activity 2377AR 14079 68Power transmission for all of us. And why I believe we are better prepared than ever for major solar events 33Short PBS episode on Aurora sounds 5New satellites - Proba-3, PUNCH, SWFO-L1, GOES-U/19 54
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 | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/30 | M2.03 |
| Last geomagnetic storm | 2025/05/01 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2025 | 140.6 +6.4 |
| May 2025 | 59 -81.6 |
| Last 30 days | 119.8 -10.8 |