NOAA / Space Weather Prediction Center

Mass Ejection graphic

Space Weather Alerts

Alerts/Displays - Archive - Email Registration - Help/Samples

Alerts in Graphical Timelines: Past 7 days and Currently in Effect
Alerts in Text Format: Current month and Previous month

Alerts Issued in April 2010


Space Weather Message Code: ALTK04
Serial Number: 1448
Issue Time: 2010 Apr 29 0407 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2010 Apr 29 0405 UTC
Synoptic Period: 0300-0600 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1622
Issue Time: 2010 Apr 29 0357 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 29 0400 UTC
Valid To: 2010 Apr 29 0900 UTC
Warning Condition: Onset


Space Weather Message Code: ALTK05
Serial Number: 638
Issue Time: 2010 Apr 24 0347 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2010 Apr 24 0346 UTC
Synoptic Period: 0300-0600 UTC
Station: Boulder
Active Warning: Yes
NOAA Scale: G1 - Minor


Space Weather Message Code: WARK05
Serial Number: 659
Issue Time: 2010 Apr 24 0337 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2010 Apr 24 0340 UTC
Valid To: 2010 Apr 24 0900 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

Comment: Expected to be isolated event.


Space Weather Message Code: ALTK04
Serial Number: 1447
Issue Time: 2010 Apr 24 0302 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2010 Apr 24 0255 UTC
Synoptic Period: 0300-0600 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1621
Issue Time: 2010 Apr 24 0300 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 24 0258 UTC
Valid To: 2010 Apr 24 0900 UTC
Warning Condition: Onset


Space Weather Message Code: WARK05
Serial Number: 658
Issue Time: 2010 Apr 23 0424 UTC

CANCEL WARNING: Geomagnetic K-index of 5 expected
Cancel Serial Number: 657
Original Issue Time: 2010 Apr 23 0129 UTC

Comment: Conditions for this Alert are no longer present.


Space Weather Message Code: WARK05
Serial Number: 657
Issue Time: 2010 Apr 23 0203 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 656
Valid From: 2010 Apr 23 0130 UTC
Now Valid Until: 2010 Apr 23 0600 UTC
Warning Condition: Onset


Space Weather Message Code: ALTK05
Serial Number: 637
Issue Time: 2010 Apr 23 0130 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2010 Apr 23 0130 UTC
Synoptic Period: 0000-0300 UTC
Station: Boulder
Active Warning: Yes
NOAA Scale: G1 - Minor


Space Weather Message Code: WARK05
Serial Number: 656
Issue Time: 2010 Apr 23 0129 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2010 Apr 23 0130 UTC
Valid To: 2010 Apr 23 0300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor


Space Weather Message Code: ALTK04
Serial Number: 1446
Issue Time: 2010 Apr 23 0059 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2010 Apr 23 0058 UTC
Synoptic Period: 0000-0300 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1620
Issue Time: 2010 Apr 23 0058 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 23 0058 UTC
Valid To: 2010 Apr 23 0600 UTC
Warning Condition: Onset


Space Weather Message Code: ALTK04
Serial Number: 1445
Issue Time: 2010 Apr 14 2335 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2010 Apr 14 2333 UTC
Synoptic Period: 2100-2400 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1619
Issue Time: 2010 Apr 14 2312 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 14 2313 UTC
Valid To: 2010 Apr 15 0600 UTC
Warning Condition: Onset


Space Weather Message Code: ALTEF3
Serial Number: 1658
Issue Time: 2010 Apr 14 2119 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2010 Apr 14 2100 UTC
Station: GOES13


Space Weather Message Code: WARK05
Serial Number: 655
Issue Time: 2010 Apr 12 1302 UTC

CANCEL WARNING: Geomagnetic K-index of 5 expected
Cancel Serial Number: 654
Original Issue Time: 2010 Apr 12 0222 UTC

Comment: Conditions for this Warning are no longer present.


Space Weather Message Code: WARK06
Serial Number: 165
Issue Time: 2010 Apr 12 0911 UTC

CANCEL WARNING: Geomagnetic K-Index of 6 expected
Cancel Serial Number: 164
Original Issue Time: 2010 Apr 12 0224 UTC

Comment: Conditions for this Warning are no longer present.


Space Weather Message Code: WARK07
Serial Number: 31
Issue Time: 2010 Apr 12 0427 UTC

CANCEL WARNING: Geomagnetic K-index of 7 or greater expected
Cancel Serial Number: 30
Original Issue Time: 2010 Apr 12 0239 UTC

Comment: The K index of 7 which occured at 0240UTC is no longer expected to
re-occur due to this event.


Space Weather Message Code: ALTK07
Serial Number: 82
Issue Time: 2010 Apr 12 0240 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2010 Apr 12 0240 UTC
Synoptic Period: 0000-0300 UTC
Station: Boulder
Active Warning: Yes
NOAA Scale: G3 - Strong


Space Weather Message Code: WARK07
Serial Number: 30
Issue Time: 2010 Apr 12 0239 UTC

WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2010 Apr 12 0240 UTC
Valid To: 2010 Apr 12 1600 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater - Strong to Extreme


Space Weather Message Code: ALTK06
Serial Number: 263
Issue Time: 2010 Apr 12 0226 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2010 Apr 12 0225 UTC
Synoptic Period: 0000-0300 UTC
Station: Boulder
Active Warning: Yes
NOAA Scale: G2 - Moderate


Space Weather Message Code: ALTK05
Serial Number: 636
Issue Time: 2010 Apr 12 0225 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2010 Apr 12 0224 UTC
Synoptic Period: 0000-0300 UTC
Station: Boulder
Active Warning: Yes
NOAA Scale: G1 - Minor


Space Weather Message Code: WARK06
Serial Number: 164
Issue Time: 2010 Apr 12 0224 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2010 Apr 12 0230 UTC
Valid To: 2010 Apr 12 1600 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate


Space Weather Message Code: WARK05
Serial Number: 654
Issue Time: 2010 Apr 12 0222 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2010 Apr 12 0223 UTC
Valid To: 2010 Apr 12 1600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor


Space Weather Message Code: ALTK04
Serial Number: 1444
Issue Time: 2010 Apr 12 0208 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2010 Apr 12 0206 UTC
Synoptic Period: 0000-0300 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1618
Issue Time: 2010 Apr 11 2353 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1617
Valid From: 2010 Apr 11 1715 UTC
Now Valid Until: 2010 Apr 12 1600 UTC
Warning Condition: Onset


Space Weather Message Code: WARK04
Serial Number: 1617
Issue Time: 2010 Apr 11 1713 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 11 1715 UTC
Valid To: 2010 Apr 12 0000 UTC
Warning Condition: Onset


Space Weather Message Code: SUMSUD
Serial Number: 107
Issue Time: 2010 Apr 11 1320 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2010 Apr 11 1304 UTC
Deviation: 5 nT
Station: Boulder


Space Weather Message Code: ALTEF3
Serial Number: 1657
Issue Time: 2010 Apr 11 0917 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1656
Begin Time: 2010 Apr 05 0915 UTC
Yesterday Maximum 2MeV Flux: 82248 pfu


Space Weather Message Code: SUMSUD
Serial Number: 106
Issue Time: 2010 Apr 11 0749 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2010 Apr 11 0713 UTC
Deviation: 6 nT
Station: Boulder


Space Weather Message Code: ALTEF3
Serial Number: 1656
Issue Time: 2010 Apr 10 0900 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1655
Begin Time: 2010 Apr 05 0915 UTC
Yesterday Maximum 2MeV Flux: 70255 pfu


Space Weather Message Code: ALTEF3
Serial Number: 1655
Issue Time: 2010 Apr 09 0900 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1654
Begin Time: 2010 Apr 05 0915 UTC
Yesterday Maximum 2MeV Flux: 120119 pfu


Space Weather Message Code: ALTEF3
Serial Number: 1654
Issue Time: 2010 Apr 08 0900 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1653
Begin Time: 2010 Apr 05 0915 UTC
Yesterday Maximum 2MeV Flux: 183713 pfu


Space Weather Message Code: WARK05
Serial Number: 653
Issue Time: 2010 Apr 08 0215 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2010 Apr 08 0215 UTC
Valid To: 2010 Apr 08 1600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor


Space Weather Message Code: ALTK04
Serial Number: 1443
Issue Time: 2010 Apr 08 0214 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2010 Apr 08 0215 UTC
Synoptic Period: 0000-0300 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1616
Issue Time: 2010 Apr 08 0211 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 08 0211 UTC
Valid To: 2010 Apr 08 1600 UTC
Warning Condition: Onset


Space Weather Message Code: WARK04
Serial Number: 1615
Issue Time: 2010 Apr 07 1542 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 07 1600 UTC
Valid To: 2010 Apr 07 2359 UTC
Warning Condition: Persistence


Space Weather Message Code: ALTEF3
Serial Number: 1653
Issue Time: 2010 Apr 07 0902 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1652
Begin Time: 2010 Apr 05 0915 UTC
Yesterday Maximum 2MeV Flux: 113979 pfu


Space Weather Message Code: ALTK05
Serial Number: 635
Issue Time: 2010 Apr 07 0849 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2010 Apr 07 0847 UTC
Synoptic Period: 0600-0900 UTC
Station: Boulder
Active Warning: No
NOAA Scale: G1 - Minor


Space Weather Message Code: WARK04
Serial Number: 1614
Issue Time: 2010 Apr 06 2303 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1613
Valid From: 2010 Apr 06 0041 UTC
Now Valid Until: 2010 Apr 07 1600 UTC
Warning Condition: Persistence


Space Weather Message Code: WARK04
Serial Number: 1613
Issue Time: 2010 Apr 06 1556 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1612
Valid From: 2010 Apr 06 0041 UTC
Now Valid Until: 2010 Apr 07 0000 UTC
Warning Condition: Onset


Space Weather Message Code: ALTEF3
Serial Number: 1652
Issue Time: 2010 Apr 06 0914 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1651
Begin Time: 2010 Apr 05 0915 UTC
Yesterday Maximum 2MeV Flux: 3000 pfu


Space Weather Message Code: ALTK06
Serial Number: 262
Issue Time: 2010 Apr 06 0423 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2010 Apr 06 0422 UTC
Synoptic Period: 0300-0600 UTC
Station: Boulder
Active Warning: Yes
NOAA Scale: G2 - Moderate


Space Weather Message Code: WARK06
Serial Number: 163
Issue Time: 2010 Apr 06 0416 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2010 Apr 06 0415 UTC
Valid To: 2010 Apr 06 0600 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate


Space Weather Message Code: ALTK05
Serial Number: 634
Issue Time: 2010 Apr 06 0052 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2010 Apr 06 0050 UTC
Synoptic Period: 0000-0300 UTC
Station: Boulder
Active Warning: Yes
NOAA Scale: G1 - Minor


Space Weather Message Code: ALTK04
Serial Number: 1442
Issue Time: 2010 Apr 06 0045 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2010 Apr 06 0045 UTC
Synoptic Period: 0000-0300 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK05
Serial Number: 652
Issue Time: 2010 Apr 06 0044 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2010 Apr 06 0044 UTC
Valid To: 2010 Apr 06 1600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor


Space Weather Message Code: WARK04
Serial Number: 1612
Issue Time: 2010 Apr 06 0042 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 06 0041 UTC
Valid To: 2010 Apr 06 1600 UTC
Warning Condition: Onset


Space Weather Message Code: WARK06
Serial Number: 162
Issue Time: 2010 Apr 05 1831 UTC

CANCEL WARNING: Geomagnetic K-Index of 6 expected
Cancel Serial Number: 161
Original Issue Time: 2010 Apr 05 1427 UTC

Comment: Earlier indications of anticipated geomagnetic storm activity are no
longer present.


Space Weather Message Code: WARK06
Serial Number: 161
Issue Time: 2010 Apr 05 1427 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2010 Apr 05 1430 UTC
Valid To: 2010 Apr 06 0000 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate


Space Weather Message Code: ALTK07
Serial Number: 81
Issue Time: 2010 Apr 05 0956 UTC

ALERT: Geomagnetic K-index of 7
Threshold Reached: 2010 Apr 05 0955 UTC
Synoptic Period: 0900-1200 UTC
Station: Boulder
Active Warning: No
NOAA Scale: G3 - Strong


Space Weather Message Code: ALTEF3
Serial Number: 1651
Issue Time: 2010 Apr 05 0949 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2010 Apr 05 0915 UTC
Station: GOES-11


Space Weather Message Code: ALTK06
Serial Number: 261
Issue Time: 2010 Apr 05 0922 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2010 Apr 05 0920 UTC
Synoptic Period: 0900-1200 UTC
Station: Boulder
Active Warning: No
NOAA Scale: G2 - Moderate


Space Weather Message Code: ALTK05
Serial Number: 633
Issue Time: 2010 Apr 05 0917 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2010 Apr 05 0916 UTC
Synoptic Period: 0900-1200 UTC
Station: Boulder
Active Warning: Yes
NOAA Scale: G1 - Minor


Space Weather Message Code: WARK05
Serial Number: 651
Issue Time: 2010 Apr 05 0916 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2010 Apr 05 0920 UTC
Valid To: 2010 Apr 05 1600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor


Space Weather Message Code: SUMSUD
Serial Number: 105
Issue Time: 2010 Apr 05 0840 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2010 Apr 05 0826 UTC
Deviation: 38 nT
Station: Boulder


Space Weather Message Code: WARSUD
Serial Number: 72
Issue Time: 2010 Apr 05 0804 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2010 Apr 05 0805 UTC
Valid To: 2010 Apr 05 0845 UTC
IP Shock Passage Observed: 2010 Apr 05 0756 UTC


Space Weather Message Code: ALTK04
Serial Number: 1441
Issue Time: 2010 Apr 05 0544 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2010 Apr 05 0543 UTC
Synoptic Period: 0300-0600 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1611
Issue Time: 2010 Apr 05 0533 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 05 0534 UTC
Valid To: 2010 Apr 05 1600 UTC
Warning Condition: Onset


Space Weather Message Code: ALTEF3
Serial Number: 1650
Issue Time: 2010 Apr 04 1607 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 1649
Begin Time: 2010 Apr 03 1845 UTC
Yesterday Maximum 2MeV Flux: 1389 pfu


Space Weather Message Code: ALTK04
Serial Number: 1440
Issue Time: 2010 Apr 04 0706 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2010 Apr 04 0704 UTC
Synoptic Period: 0600-0900 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1610
Issue Time: 2010 Apr 04 0703 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 04 0705 UTC
Valid To: 2010 Apr 04 1600 UTC
Warning Condition: Onset


Space Weather Message Code: ALTEF3
Serial Number: 1649
Issue Time: 2010 Apr 03 1906 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2010 Apr 03 1845 UTC
Station: GOES11


Space Weather Message Code: WARSUD
Serial Number: 71
Issue Time: 2010 Apr 03 1337 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2010 Apr 03 1340 UTC
Valid To: 2010 Apr 03 1415 UTC
IP Shock Passage Observed: 2010 Apr 03 1301 UTC


Space Weather Message Code: WARK04
Serial Number: 1609
Issue Time: 2010 Apr 02 1154 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 1608
Valid From: 2010 Apr 02 0735 UTC
Now Valid Until: 2010 Apr 02 1600 UTC
Warning Condition: Onset


Space Weather Message Code: ALTK04
Serial Number: 1439
Issue Time: 2010 Apr 02 0840 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2010 Apr 02 0840 UTC
Synoptic Period: 0600-0900 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: SUMSUD
Serial Number: 104
Issue Time: 2010 Apr 02 0745 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2010 Apr 02 0721 UTC
Deviation: 19 nT
Station: Boulder


Space Weather Message Code: WARK04
Serial Number: 1608
Issue Time: 2010 Apr 02 0733 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 02 0735 UTC
Valid To: 2010 Apr 02 1200 UTC
Warning Condition: Onset


Space Weather Message Code: WARSUD
Serial Number: 70
Issue Time: 2010 Apr 02 0718 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2010 Apr 02 0720 UTC
Valid To: 2010 Apr 02 0750 UTC
IP Shock Passage Observed: 2010 Apr 02 0640 UTC


Space Weather Message Code: ALTK04
Serial Number: 1438
Issue Time: 2010 Apr 01 1557 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2010 Apr 01 1556 UTC
Synoptic Period: 1500-1800 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1607
Issue Time: 2010 Apr 01 1554 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 01 1555 UTC
Valid To: 2010 Apr 01 1800 UTC
Warning Condition: Onset


Space Weather Message Code: WARK04
Serial Number: 1606
Issue Time: 2010 Apr 01 0407 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2010 Apr 01 0420 UTC
Valid To: 2010 Apr 01 1600 UTC
Warning Condition: Onset