Viewing archive of Wednesday, 17 June 2015
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 2015 Jun 18 0520 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 168 Issued at 2200Z on 17 Jun 2015IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C3 event observed at
17/0001Z from Region 2371 (N11E66). There are currently 5 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (18 Jun, 19 Jun,
20 Jun).
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
623 km/s at 17/0346Z. Total IMF reached 8 nT at 16/2133Z. The maximum
southward component of Bz reached -7 nT at 17/1320Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 2803 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (18-20 Jun).
III. Event Probabilities 18 Jun to 20 Jun
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Jun 136 Predicted 18 Jun-20 Jun 135/130/130 90 Day Mean 17 Jun 126
V. Geomagnetic A Indices
Observed Afr/Ap 17 Jun 014/014 Estimated Afr/Ap 17 Jun 012/012 Predicted Afr/Ap 18 Jun-20 Jun 006/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 18 Jun to 20 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 10% | 10% | 10% |
All times in UTC
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