Viewing archive of Wednesday, 16 March 2011
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 2011 Mar 16 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 075 Issued at 2200Z on 16 Mar 2011IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z Solar activity was at low levels. During the period,
Region 1169 (N17W75) produced a few low-level C-class events
including a long-duration (LDE) C3/Sf flare at 16/2034Z. The flare
was still in progress at the time of this writing. Associated with
this LDE was a partial-halo CME, first observed in LASCO C2 imagery
at 16/1912Z. A preliminary plane-of-sky estimate indicated a
velocity near 500 km/s. The region maintained its beta-gamma
magnetic classification as it approached the west limb. New Region
1173 (S28E39) emerged on the disk as a bi-polar C-type group. The
Penticton 10.7 cm flux and the 90-day mean are estimated for today
(16 March) due to flare enhanced readings.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a chance for an M-class event from Region 1169 for the next two
days (17 - 18 March). On day three (19 March), activity is expected
to be very low with a chance for a C-class event.
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
The geomagnetic field was quiet. Observations from the ACE satellite
indicated solar wind velocities averaged about 370 km/s while the Bz
component of the interplanetary magnetic field was mostly north at
+1 to +5 nT.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for the next three days (17 - 19 March).
III. Event Probabilities 17 Mar to 19 Mar
| Class M | 25% | 05% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 16 Mar 095 Predicted 17 Mar-19 Mar 090/085/080 90 Day Mean 16 Mar 094
V. Geomagnetic A Indices
Observed Afr/Ap 15 Mar 000/000 Estimated Afr/Ap 16 Mar 001/002 Predicted Afr/Ap 17 Mar-19 Mar 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 17 Mar to 19 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
Latest news
Monday, 23 December 2024
M9.0 solar flare with earth-directed CME
Sunday, 8 December 2024
X2.2 solar flare, SDO outage
Thursday, 21 November 2024
Major far side eruption, S1 radiation storm
Latest forum messages
AR 13932 38Strong far side CME 34250 mhz F2 52Our Sun can possibly produce a Superflare roughly every 100 years? 55Unexplained proton activity 11
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 | 2024/12/23 | M8.9 |
| 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 | 106.6 -45.9 |
| Last 30 days | 116.1 -41.8 |