Space Weather for Aviation Service Providers
NOAA National Weather Service Space Weather Prediction Center


24 hour Forecast issued Apr 21 1200 UTC, Geophysical Alert Message

Solar-terrestrial indices for 20 April follow.
Solar flux 163 and estimated planetary A-index 22.
The estimated planetary K-index at 1200 UTC on 21 April was 4.

Space weather for the past 24 hours has been minor.
Geomagnetic storms reaching the G1 level occurred.
Solar radiation storms reaching the S1 level occurred.

Space weather for the next 24 hours is predicted to be minor.
Geomagnetic storms reaching the G1 level are likely.
Radio blackouts reaching the R1 level are likely.

Latest 3-day Solar Weather Forecast

NOAA Scale
Geomagnetic Storms
Solar Radiation Storms
Radio Blackouts


POES Auroral Activity Estimate
Latest POES auroral activity estimate
Effects: HF Radio propagation, Aurora boundaries
SDO - HMI Intensitygram
Latest SDO - HMI Intensitygram
Image courtesy NASA SDO
Global D-Region Absorption Prediction
Latest Global D-Region Absorption Prediction map
Effects: HF Radio communications

Estimated Planetary K-index
Latest Estimated Planetary Kp plot
Effects: HF Radio propagation
 
GOES-15 Proton Flux
Latest GOES Proton plot
Effects: HF Radio communications,
Indicator of radiation risk
GOES X-ray Flux
Latest GOES Xray Flux plot
Effects: HF Radio communications
 

Space Weather Alerts of interest to Aviation users, issued in past 24 hours
Issue Time Type Details
Apr 20 1938 UTC SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu Begin Time: 2014 Apr 18 1525 UTC
Maximum Time: 2014 Apr 19 0105 UTC
End Time: 2014 Apr 20 1155 UTC
Maximum 10MeV Flux: 58 pfu
NOAA Scale: S1 - Minor

Last page update 2014 Apr 21 1440 UTC. This page automatically reloads every minute but not all displays are created at that rate. See User Guide for individual display update rates. Note: use browser Reload when returning to this page to ensure latest data.

The Space Weather Prediction Center (SWPC) Space Weather for Aviation Service Providers web site is designed for the aviation community to communicate space weather information in terms that are easy to interpret and understand. Solar events can have a detrimental impact on airlines and ground equipment. Space weather storms can result in lost or degraded communications, unreliable navigational equipment, flight-critical electronic system problems, and radiation hazards to crew and passengers.

Displays show the most recent data available at SWPC. See the sample web page which shows how the page looked during the high solar activity in September 2005. See Data and Products for earlier data.

The Space Weather for Aviation Service Providers web page is described in its Product Description Document. The Feedback Form can be used for comments, questions and suggestions. SWPC.CustomerSupport@noaa.gov


Space Weather Prediction Center -- Space Weather Topics
Alerts / Warnings, Space Weather Now, Today’s Space Wx, Data and Products, About Us,
Email Products, Space Wx Workshop, Education/Outreach, Customer Services, Contact Us