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Alerts Issued in October 2012

Space Weather Message Code: ALTK05
Serial Number: 707
Issue Time: 2012 Oct 14 0204 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 Oct 14 0200 UTC
Synoptic Period: 0000-0300 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: 814
Issue Time: 2012 Oct 14 0159 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 Oct 14 0200 UTC
Valid To: 2012 Oct 14 0900 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: WATA20
Serial Number: 501
Issue Time: 2012 Oct 13 1842 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Oct 14: G1 (Minor) Oct 15: None (Below G1) Oct 16: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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: 2020
Issue Time: 2012 Oct 13 1755 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2019
Valid From: 2012 Oct 12 2250 UTC
Now Valid Until: 2012 Oct 14 1700 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: 706
Issue Time: 2012 Oct 13 1719 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 Oct 13 1719 UTC
Synoptic Period: 1500-1800 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: 813
Issue Time: 2012 Oct 13 1709 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 Oct 13 1709 UTC
Valid To: 2012 Oct 13 2359 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: WARK05
Serial Number: 812
Issue Time: 2012 Oct 13 1150 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 811
Valid From: 2012 Oct 13 0515 UTC
Now Valid Until: 2012 Oct 13 1500 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: 2019
Issue Time: 2012 Oct 13 1150 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2018
Valid From: 2012 Oct 12 2250 UTC
Now Valid Until: 2012 Oct 13 1800 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: 1962
Issue Time: 2012 Oct 13 0918 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1960
Begin Time: 2012 Oct 09 1015 UTC
Yesterday Maximum 2MeV Flux: 11400 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Space Weather Message Code: WARK05
Serial Number: 811
Issue Time: 2012 Oct 13 0831 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 810
Valid From: 2012 Oct 13 0515 UTC
Now Valid Until: 2012 Oct 13 1200 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: WARK06
Serial Number: 214
Issue Time: 2012 Oct 13 0831 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2012 Oct 13 0830 UTC
Valid To: 2012 Oct 13 1200 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: ALTK05
Serial Number: 705
Issue Time: 2012 Oct 13 0823 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 Oct 13 0819 UTC
Synoptic Period: 0600-0900 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: 810
Issue Time: 2012 Oct 13 0502 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 Oct 13 0515 UTC
Valid To: 2012 Oct 13 0900 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: ALTK04
Serial Number: 1615
Issue Time: 2012 Oct 13 0452 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 Oct 13 0450 UTC
Synoptic Period: 0300-0600 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: 2018
Issue Time: 2012 Oct 12 2245 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 Oct 12 2250 UTC
Valid To: 2012 Oct 13 1300 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: 1960
Issue Time: 2012 Oct 12 0502 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1959
Begin Time: 2012 Oct 09 1015 UTC
Yesterday Maximum 2MeV Flux: 9335 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Space Weather Message Code: ALTK04
Serial Number: 1614
Issue Time: 2012 Oct 12 0453 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 Oct 12 0453 UTC
Synoptic Period: 0300-0600 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: 2017
Issue Time: 2012 Oct 12 0406 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 Oct 12 0406 UTC
Valid To: 2012 Oct 12 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: 1959
Issue Time: 2012 Oct 11 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1958
Begin Time: 2012 Oct 09 1015 UTC
Yesterday Maximum 2MeV Flux: 4623 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Space Weather Message Code: ALTEF3
Serial Number: 1958
Issue Time: 2012 Oct 10 1123 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1957
Begin Time: 2012 Oct 09 1015 UTC
Yesterday Maximum 2MeV Flux: 4329 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Space Weather Message Code: ALTK05
Serial Number: 704
Issue Time: 2012 Oct 09 2246 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 Oct 09 2246 UTC
Synoptic Period: 2100-2400 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: 809
Issue Time: 2012 Oct 09 2240 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 Oct 09 2240 UTC
Valid To: 2012 Oct 10 0300 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: ALTK04
Serial Number: 1613
Issue Time: 2012 Oct 09 2204 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 Oct 09 2204 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: 2016
Issue Time: 2012 Oct 09 2149 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 Oct 09 2150 UTC
Valid To: 2012 Oct 10 0600 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: WARK04
Serial Number: 2015
Issue Time: 2012 Oct 09 1145 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2014
Valid From: 2012 Oct 08 0445 UTC
Now Valid Until: 2012 Oct 09 1800 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: ALTEF3
Serial Number: 1957
Issue Time: 2012 Oct 09 1032 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2012 Oct 09 1015 UTC
Station: GOES13
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Space Weather Message Code: ALTK06
Serial Number: 298
Issue Time: 2012 Oct 09 0540 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2012 Oct 09 0540 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: WARK04
Serial Number: 2014
Issue Time: 2012 Oct 09 0540 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2013
Valid From: 2012 Oct 08 0445 UTC
Now Valid Until: 2012 Oct 09 1200 UTC
Warning Condition: Persistence

Comment: Bz remains at negative 18nT.
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: 808
Issue Time: 2012 Oct 09 0540 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 807
Valid From: 2012 Oct 08 1800 UTC
Now Valid Until: 2012 Oct 09 1200 UTC
Warning Condition: Persistence

Comment: Bz remains at negative 18nT.
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: WARK06
Serial Number: 213
Issue Time: 2012 Oct 09 0540 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 212
Valid From: 2012 Oct 09 0035 UTC
Now Valid Until: 2012 Oct 09 1200 UTC
Warning Condition: Persistence

Comment: Bz remains at negative 18nT.
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: ALTK06
Serial Number: 297
Issue Time: 2012 Oct 09 0111 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2012 Oct 09 0111 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: ALTK05
Serial Number: 703
Issue Time: 2012 Oct 09 0039 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 Oct 09 0039 UTC
Synoptic Period: 0000-0300 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: WARK06
Serial Number: 212
Issue Time: 2012 Oct 09 0033 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2012 Oct 09 0035 UTC
Valid To: 2012 Oct 09 0600 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: WARK05
Serial Number: 807
Issue Time: 2012 Oct 08 2344 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 806
Valid From: 2012 Oct 08 1800 UTC
Now Valid Until: 2012 Oct 09 0600 UTC
Warning Condition: Persitence
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: 806
Issue Time: 2012 Oct 08 1756 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 Oct 08 1800 UTC
Valid To: 2012 Oct 08 2359 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: 2013
Issue Time: 2012 Oct 08 1755 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2012
Valid From: 2012 Oct 08 0445 UTC
Now Valid Until: 2012 Oct 09 0600 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: ALTK06
Serial Number: 296
Issue Time: 2012 Oct 08 1144 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2012 Oct 08 1138 UTC
Synoptic Period: 0900-1200 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: WARK04
Serial Number: 2012
Issue Time: 2012 Oct 08 1136 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2010
Valid From: 2012 Oct 08 0445 UTC
Now Valid Until: 2012 Oct 08 1800 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: 805
Issue Time: 2012 Oct 08 1136 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 803
Valid From: 2012 Oct 08 0640 UTC
Now Valid Until: 2012 Oct 08 1500 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: ALTK06
Serial Number: 295
Issue Time: 2012 Oct 08 0836 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2012 Oct 08 0834 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: WARK06
Serial Number: 211
Issue Time: 2012 Oct 08 0832 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2012 Oct 08 0830 UTC
Valid To: 2012 Oct 08 1200 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: ALTK05
Serial Number: 702
Issue Time: 2012 Oct 08 0720 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 Oct 08 0718 UTC
Synoptic Period: 0600-0900 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: 803
Issue Time: 2012 Oct 08 0637 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 Oct 08 0640 UTC
Valid To: 2012 Oct 08 1200 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: ALTK04
Serial Number: 1612
Issue Time: 2012 Oct 08 0558 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2012 Oct 08 0556 UTC
Synoptic Period: 0300-0600 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: SUMSUD
Serial Number: 161
Issue Time: 2012 Oct 08 0527 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2012 Oct 08 0515 UTC
Deviation: 21 nT
Station: BOU

Space Weather Message Code: WARK04
Serial Number: 2010
Issue Time: 2012 Oct 08 0443 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2012 Oct 08 0445 UTC
Valid To: 2012 Oct 08 1200 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: 120
Issue Time: 2012 Oct 08 0440 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2012 Oct 08 0515 UTC
Valid To: 2012 Oct 08 0545 UTC
IP Shock Passage Observed: 2012 Oct 08 0430 UTC

Space Weather Message Code: WATA20
Serial Number: 500
Issue Time: 2012 Oct 07 1210 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Oct 08: G1 (Minor) Oct 09: G1 (Minor) Oct 10: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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: WATA20
Serial Number: 499
Issue Time: 2012 Oct 05 2036 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Oct 06: None (Below G1) Oct 07: None (Below G1) Oct 08: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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: ALTK06
Serial Number: 294
Issue Time: 2012 Oct 01 0443 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2012 Oct 01 0439 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: WARK05
Serial Number: 802
Issue Time: 2012 Oct 01 0319 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 801
Valid From: 2012 Oct 01 0030 UTC
Now Valid Until: 2012 Oct 01 0900 UTC
Warning Condition: Onset

Comment: This warning has been extended to coincide with the period covered by the K6 (G2) warning.
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: ALTK07
Serial Number: 86
Issue Time: 2012 Oct 01 0305 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2012 Oct 01 0300 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

Space Weather Message Code: WARK06
Serial Number: 210
Issue Time: 2012 Oct 01 0244 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 209
Valid From: 2012 Oct 01 0145 UTC
Now Valid Until: 2012 Oct 01 0900 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: WARK07
Serial Number: 40
Issue Time: 2012 Oct 01 0243 UTC

WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2012 Oct 01 0245 UTC
Valid To: 2012 Oct 01 0600 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater - Strong to Extreme

Comment: This warning upgrades the previous G2 warning.
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

Space Weather Message Code: ALTK06
Serial Number: 293
Issue Time: 2012 Oct 01 0151 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2012 Oct 01 0148 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: WARK06
Serial Number: 209
Issue Time: 2012 Oct 01 0140 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2012 Oct 01 0145 UTC
Valid To: 2012 Oct 01 0600 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

Comment: This upgrades the G1 warning currently in effect.
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: ALTK05
Serial Number: 701
Issue Time: 2012 Oct 01 0109 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2012 Oct 01 0107 UTC
Synoptic Period: 0000-0300 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: 801
Issue Time: 2012 Oct 01 0007 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2012 Oct 01 0030 UTC
Valid To: 2012 Oct 01 0600 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.

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