:Product: SWPC Space Weather Alerts ALTS.txt :Issued: 2013 May 25 1003 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 24 hours #--------------------------------------------------------------------- Space Weather Message Code: WARK05 Serial Number: 842 Issue Time: 2013 May 25 0658 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 841 Valid From: 2013 May 24 2350 UTC Now Valid Until: 2013 May 25 1300 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. #------------------------------------------------- Space Weather Message Code: WARK04 Serial Number: 2090 Issue Time: 2013 May 25 0658 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 2089 Valid From: 2013 May 24 1750 UTC Now Valid Until: 2013 May 25 1900 UTC Warning Condition: Persistence 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: ALTK05 Serial Number: 716 Issue Time: 2013 May 25 0435 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2013 May 25 0434 UTC Synoptic Period: 0300-0600 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. #------------------------------------------------- Space Weather Message Code: WARK05 Serial Number: 841 Issue Time: 2013 May 25 0356 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 840 Valid From: 2013 May 24 2350 UTC Now Valid Until: 2013 May 25 0700 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. #------------------------------------------------- Space Weather Message Code: WARK04 Serial Number: 2089 Issue Time: 2013 May 25 0356 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 2088 Valid From: 2013 May 24 1750 UTC Now Valid Until: 2013 May 25 1100 UTC Warning Condition: Persistence 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: WARPX1 Serial Number: 399 Issue Time: 2013 May 25 0055 UTC EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected Extension to Serial Number: 398 Valid From: 2013 May 22 1355 UTC Now Valid Until: 2013 May 25 0700 UTC Warning Condition: Persistence Predicted NOAA Scale: S1 - Minor Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. #------------------------------------------------- Space Weather Message Code: WARK04 Serial Number: 2088 Issue Time: 2013 May 24 2352 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 2087 Valid From: 2013 May 24 1750 UTC Now Valid Until: 2013 May 25 0700 UTC Warning Condition: Persistence 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: WARK05 Serial Number: 840 Issue Time: 2013 May 24 2352 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2013 May 24 2350 UTC Valid To: 2013 May 25 0400 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. #------------------------------------------------- Space Weather Message Code: ALTK05 Serial Number: 715 Issue Time: 2013 May 24 1853 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2013 May 24 1853 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. #------------------------------------------------- Space Weather Message Code: SUMSUD Serial Number: 173 Issue Time: 2013 May 24 1820 UTC SUMMARY: Geomagnetic Sudden Impulse Observed: 2013 May 24 1812 UTC Deviation: 18 nT Station: Boulder #------------------------------------------------- Space Weather Message Code: ALTK04 Serial Number: 1641 Issue Time: 2013 May 24 1816 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2013 May 24 1813 UTC Synoptic Period: 1800-2100 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: WARK05 Serial Number: 839 Issue Time: 2013 May 24 1815 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2013 May 24 1814 UTC Valid To: 2013 May 24 2200 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. #------------------------------------------------- Space Weather Message Code: WARK04 Serial Number: 2087 Issue Time: 2013 May 24 1749 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2013 May 24 1750 UTC Valid To: 2013 May 25 0200 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: WARSUD Serial Number: 131 Issue Time: 2013 May 24 1747 UTC WARNING: Geomagnetic Sudden Impulse expected Valid From: 2013 May 24 1750 UTC Valid To: 2013 May 24 1850 UTC IP Shock Passage Observed: 2013 May 24 1735 UTC #------------------------------------------------- Space Weather Message Code: ALTEF3 Serial Number: 2016 Issue Time: 2013 May 24 1612 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2013 May 24 1555 UTC Station: GOES15 Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. #-------------------------------------------------