:Product: SWPC Space Weather Alerts oldALTS.txt :Issued: 2012 May 16 1948 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # See http://swpc.noaa.gov/alerts/ for description and other displays # Send comments and suggestions to SWPC.Webmaster@noaa.gov # # SWPC Space Weather Alerts Issued in the last 7 Days #--------------------------------------------------------------------- Space Weather Message Code: ALTEF3 Serial Number: 1903 Issue Time: 2012 May 16 0651 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 1902 Begin Time: 2012 May 10 1415 UTC Yesterday Maximum 2MeV Flux: 3226 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. #------------------------------------------------- Space Weather Message Code: SUM10R Serial Number: 539 Issue Time: 2012 May 15 0959 UTC SUMMARY: 10cm Radio Burst Begin Time: 2012 May 15 0938 UTC Maximum Time: 2012 May 15 0939 UTC End Time: 2012 May 15 0939 UTC Duration: 1 minutes Peak Flux: 200 sfu Latest Penticton Noon Flux: 130 sfu Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications. #------------------------------------------------- Space Weather Message Code: ALTEF3 Serial Number: 1902 Issue Time: 2012 May 15 0936 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 1901 Begin Time: 2012 May 10 1415 UTC Yesterday Maximum 2MeV Flux: 5225 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. #------------------------------------------------- Space Weather Message Code: ALTEF3 Serial Number: 1901 Issue Time: 2012 May 14 0530 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 1900 Begin Time: 2012 May 10 1415 UTC Yesterday Maximum 2MeV Flux: 4270 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. #------------------------------------------------- Space Weather Message Code: ALTEF3 Serial Number: 1900 Issue Time: 2012 May 13 1106 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 1899 Begin Time: 2012 May 10 1415 UTC Yesterday Maximum 2MeV Flux: 11500 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. #------------------------------------------------- Space Weather Message Code: ALTEF3 Serial Number: 1899 Issue Time: 2012 May 12 0516 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 1898 Begin Time: 2012 May 10 1415 UTC Yesterday Maximum 2MeV Flux: 3410 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. #------------------------------------------------- Space Weather Message Code: ALTEF3 Serial Number: 1898 Issue Time: 2012 May 11 1018 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 1897 Begin Time: 2012 May 10 1415 UTC Yesterday Maximum 2MeV Flux: 2180 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. #------------------------------------------------- Space Weather Message Code: ALTK04 Serial Number: 1577 Issue Time: 2012 May 11 0000 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2012 May 10 2359 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. #------------------------------------------------- Space Weather Message Code: WARK04 Serial Number: 1928 Issue Time: 2012 May 10 2314 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2012 May 10 2315 UTC Valid To: 2012 May 11 0900 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. #------------------------------------------------- Space Weather Message Code: ALTEF3 Serial Number: 1897 Issue Time: 2012 May 10 1434 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2012 May 10 1415 UTC Station: GOES13 Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. #------------------------------------------------- Space Weather Message Code: ALTTP4 Serial Number: 369 Issue Time: 2012 May 10 0516 UTC ALERT: Type IV Radio Emission Begin Time: 2012 May 10 0402 UTC Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms. #------------------------------------------------- Space Weather Message Code: SUM10R Serial Number: 538 Issue Time: 2012 May 10 0435 UTC SUMMARY: 10cm Radio Burst Begin Time: 2012 May 10 0415 UTC Maximum Time: 2012 May 10 0417 UTC End Time: 2012 May 10 0418 UTC Duration: 3 minutes Peak Flux: 690 sfu Latest Penticton Noon Flux: 127 sfu Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications. #------------------------------------------------- Space Weather Message Code: SUMXM5 Serial Number: 89 Issue Time: 2012 May 10 0429 UTC SUMMARY: X-ray Event exceeded M5 Begin Time: 2012 May 10 0411 UTC Maximum Time: 2012 May 10 0418 UTC End Time: 2012 May 10 0423 UTC X-ray Class: M5.7 Optical Class: 2b Location: N13E22 NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth. Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes. #------------------------------------------------- Space Weather Message Code: ALTXMF Serial Number: 170 Issue Time: 2012 May 10 0418 UTC ALERT: X-Ray Flux exceeded M5 Threshold Reached: 2012 May 10 0417 UTC NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html. #-------------------------------------------------