Viewing archive of Wednesday, 20 April 2016
Geophysical 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.
Solar and Geophysical Activity Summary 2016 Apr 20 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 111 Issued at 0245Z on 20 Apr 2016 This report is compiled from data received at SWO on 19 AprA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0032 0032 0032 130 0033 0033 0033 170 0040 0040 0040 120 0046 0046 0046 120 0134 0134 0135 130 0140 0140 0142 110 0151 0151 0151 120 0155 0155 0155 130 0157 0157 0157 150 0217 0217 0217 270 0224 0224 0224 160 0224 0224 0224 150 0249 0249 0251 170 0518 0518 0518 160 0915 0915 0915 130 0920 0920 0920 120 0938 0938 0939 200 1503 1503 1503 140 1534 1534 1534 120 1637 1637 1637 120
B. Proton Events
None.
C. Geomagnetic Activity Summary
The geomagnetic field was quiet.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 089 SSN 028 Afr/Ap 003/003 X-ray Background B2.2 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 4.5e+05 GT 10 MeV 1.6e+04 p/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.90e+07 e/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 0 0 1 1 1 2 1 1 Planetary 1 0 0 0 1 1 0 1
F. Comments
None
All times in UTC
Latest news
Sunday, 7 December 2025
M8.1 solar flare with earth-directed CME
Monday, 1 December 2025
X1.9 solar flare, Coronal hole faces Earth
Friday, 14 November 2025
X4.0 solar flare
Latest forum messages
Incoming & Unnumbered Active Regions 44CH 09 1Space Weather Memes 764Unspecified geomagnetic activity 43Filaments and prominences 415
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Solar activity or if there is a chance to see the aurora, but with more traffic comes higher costs to keep the servers online. If you like SpaceWeatherLive and want to support the project you can choose a subscription for an ad-free site or consider a donation. With your help we can keep SpaceWeatherLive online!
Space weather facts
| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/20 | M1.0 |
| Last geomagnetic storm | 2025/12/12 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 120.8 +29 |
| Last 30 days | 108.7 +19.4 |