GET /spaceweather/alerts/history
Archive of issued NOAA SWPC alerts: geomagnetic storm watches, solar radiation storms, radio blackout warnings, and more. Filter by ?start and ?end. Ideal for post-mortems on specific events, training data for alert prediction models, and historical context when an alert fires today.
start
optional
Start datetime
end
optional
End datetime
limit
optional
default: 500
Max rows (cap 10000)
| Name | Required | Default | Description |
|---|---|---|---|
start |
No | - | Start datetime |
end |
No | - | End datetime |
limit |
No | 500 | Max rows (cap 10000) |
curl "https://nordapi.ee/api/v1/spaceweather/alerts/history?limit=100"
{
"count": 20,
"data": [
{
"issue_datetime": "2026-07-04T05:10:10Z",
"message": "Space Weather Message Code: ALTK07\r\nSerial Number: 218\r\nIssue Time: 2026 Jul 04 0509 UTC\r\n\r\nALERT: Geomagnetic K-index of 7 \nThreshold Reached: 2026 Jul 04 0509 UTC\nSynoptic Period: 0300-0600\nActive Warning: YES\nNoaa Scale: G3 - Strong\nComment: \r\n\nNOAA Scale: G3 - Strong",
"product_id": "K07A"
},
{
"issue_datetime": "2026-07-04T07:15:51Z",
"message": "Space Weather Message Code: ALTK05\r\nSerial Number: 2033\r\nIssue Time: 2026 Jul 04 0715 UTC\r\n\r\nALERT: Geomagnetic K-index of 5 \nThreshold Reached: 2026 Jul 04 0715 UTC\nSynoptic Period: 0600-0900\nActive Warning: YES\nNoaa Scale: G1 - Minor\nComment: \r\n\nNOAA Scale: G1 - Minor\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.\r\nInduced Currents - Weak power grid fluctuations can occur.\r\nSpacecraft - Minor impact on satellite operations possible.\r\nAurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.",
"product_id": "K05A"
},
{
"issue_datetime": "2026-07-04T08:39:45Z",
"message": "Space Weather Message Code: ALTK06\r\nSerial Number: 721\r\nIssue Time: 2026 Jul 04 0839 UTC\r\n\r\nALERT: Geomagnetic K-index of 6 \nThreshold Reached: 2026 Jul 04 0839 UTC\nSynoptic Period: 0600-0900\nActive Warning: YES\nNoaa Scale: G2 - Moderate\nComment: \r\n\nNOAA Scale: G2 - Moderate\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.\r\nInduced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.\r\nSpacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.\r\nRadio - HF (high frequency) radio propagation can fade at higher latitudes.\r\nAurora - Aurora may be seen as low as New York to Wisconsin to Washington state.",
"product_id": "K06A"
},
{
"issue_datetime": "2026-07-04T10:43:53Z",
"message": "Space Weather Message Code: ALTK05\r\nSerial Number: 2034\r\nIssue Time: 2026 Jul 04 1043 UTC\r\n\r\nALERT: Geomagnetic K-index of 5 \nThreshold Reached: 2026 Jul 04 1043 UTC\nSynoptic Period: 0900-1200\nActive Warning: YES\nNoaa Scale: G1 - Minor\nComment: \r\n\nNOAA Scale: G1 - Minor\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.\r\nInduced Currents - Weak power grid fluctuations can occur.\r\nSpacecraft - Minor impact on satellite operations possible.\r\nAurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.",
"product_id": "K05A"
},
{
"issue_datetime": "2026-07-04T13:22:10Z",
"message": "Space Weather Message Code: ALTK05\r\nSerial Number: 2035\r\nIssue Time: 2026 Jul 04 1321 UTC\r\n\r\nALERT: Geomagnetic K-index of 5 \nThreshold Reached: 2026 Jul 04 1319 UTC\nSynoptic Period: 1200-1500\nActive Warning: YES\nNoaa Scale: G1 - Minor\nComment: \r\n\nNOAA Scale: G1 - Minor\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.\r\nInduced Currents - Weak power grid fluctuations can occur.\r\nSpacecraft - Minor impact on satellite operations possible.\r\nAurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.",
"product_id": "K05A"
},
{
"issue_datetime": "2026-07-04T13:57:38Z",
"message": "Space Weather Message Code: WARK06\r\nSerial Number: 665\r\nIssue Time: 2026 Jul 04 1357 UTC\r\n\r\nWARNING: Geomagnetic K-index of 6 expected \nValid From: 2026 Jul 04 1356 UTC\nValid To: 2026 Jul 05 2100 UTC\nWarning Conditions: Onset\nNoaa Scale: G2 - Moderate\nComment: \r\n\nNOAA Scale: G2 - Moderate\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.\r\nInduced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.\r\nSpacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.\r\nRadio - HF (high frequency) radio propagation can fade at higher latitudes.\r\nAurora - Aurora may be seen as low as New York to Wisconsin to Washington state.",
"product_id": "K06W"
},
{
"issue_datetime": "2026-07-04T13:58:21Z",
"message": "Space Weather Message Code: ALTK06\r\nSerial Number: 722\r\nIssue Time: 2026 Jul 04 1358 UTC\r\n\r\nALERT: Geomagnetic K-index of 6 \nThreshold Reached: 2026 Jul 04 1358 UTC\nSynoptic Period: 1200-1500\nActive Warning: YES\nNoaa Scale: G2 - Moderate\nComment: \r\n\nNOAA Scale: G2 - Moderate\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.\r\nInduced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.\r\nSpacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.\r\nRadio - HF (high frequency) radio propagation can fade at higher latitudes.\r\nAurora - Aurora may be seen as low as New York to Wisconsin to Washington state.",
"product_id": "K06A"
},
{
"issue_datetime": "2026-07-04T14:12:48Z",
"message": "Space Weather Message Code: WARK05\r\nSerial Number: 2248\r\nIssue Time: 2026 Jul 04 1412 UTC\r\n\r\nEXTENDED WARNING: Geomagnetic K-index of 5 expected\nExtension to Serial Number: 2247\nValid From: 2026 Jul 04 0100 UTC\nNow Valid Until: 2026 Jul 04 2359 UTC\nWarning Condition: Persistence\n\r\n\nNOAA Scale: G1 - Minor\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.\r\nInduced Currents - Weak power grid fluctuations can occur.\r\nSpacecraft - Minor impact on satellite operations possible.\r\nAurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.",
"product_id": "K05W"
},
{
"issue_datetime": "2026-07-04T14:21:41Z",
"message": "Space Weather Message Code: WARK04\r\nSerial Number: 5377\r\nIssue Time: 2026 Jul 04 1421 UTC\r\n\r\nEXTENDED WARNING: Geomagnetic K-index of 4 expected\nExtension to Serial Number: 5376\nValid From: 2026 Jul 03 1209 UTC\nNow Valid Until: 2026 Jul 05 0300 UTC\nWarning Condition: Persistence\n\r\n\n\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.\r\nInduced Currents - Weak power grid fluctuations can occur.\r\nAurora - Aurora may be visible at high latitudes such as Canada and Alaska.",
"product_id": "K04W"
},
{
"issue_datetime": "2026-07-04T16:14:30Z",
"message": "Space Weather Message Code: ALTK05\r\nSerial Number: 2036\r\nIssue Time: 2026 Jul 04 1614 UTC\r\n\r\nALERT: Geomagnetic K-index of 5 \nThreshold Reached: 2026 Jul 04 1610 UTC\nSynoptic Period: 1500-1800\nActive Warning: YES\nNoaa Scale: G1 - Minor\nComment: \r\n\nNOAA Scale: G1 - Minor\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.\r\nInduced Currents - Weak power grid fluctuations can occur.\r\nSpacecraft - Minor impact on satellite operations possible.\r\nAurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.",
"product_id": "K05A"
},
{
"issue_datetime": "2026-07-04T17:00:15Z",
"message": "Space Weather Message Code: ALTK06\r\nSerial Number: 723\r\nIssue Time: 2026 Jul 04 1700 UTC\r\n\r\nALERT: Geomagnetic K-index of 6 \nThreshold Reached: 2026 Jul 04 1655 UTC\nSynoptic Period: 1500-1800\nActive Warning: YES\nNoaa Scale: G2 - Moderate\nComment: \r\n\nNOAA Scale: G2 - Moderate\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.\r\nInduced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.\r\nSpacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.\r\nRadio - HF (high frequency) radio propagation can fade at higher latitudes.\r\nAurora - Aurora may be seen as low as New York to Wisconsin to Washington state.",
"product_id": "K06A"
},
{
"issue_datetime": "2026-07-04T20:22:27Z",
"message": "Space Weather Message Code: ALTK05\r\nSerial Number: 2037\r\nIssue Time: 2026 Jul 04 2022 UTC\r\n\r\nALERT: Geomagnetic K-index of 5 \nThreshold Reached: 2026 Jul 04 2018 UTC\nSynoptic Period: 1800-2100\nActive Warning: YES\nNoaa Scale: G1 - Minor\nComment: \r\n\nNOAA Scale: G1 - Minor\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.\r\nInduced Currents - Weak power grid fluctuations can occur.\r\nSpacecraft - Minor impact on satellite operations possible.\r\nAurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.",
"product_id": "K05A"
},
{
"issue_datetime": "2026-07-04T20:43:17Z",
"message": "Space Weather Message Code: ALTXMF\r\nSerial Number: 538\r\nIssue Time: 2026 Jul 04 2043 UTC\r\n\r\nALERT: X-Ray Flux exceeded M5 \nThreshold Reached: 2026 Jul 04 2040 UTC\nNoaa Scale: R2 - Moderate\nComment: \r\n\nNOAA Scale: R2 - Moderate\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential 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/products/d-region-absorption-predictions-d-rap.",
"product_id": "XM5A"
},
{
"issue_datetime": "2026-07-04T21:12:25Z",
"message": "Space Weather Message Code: ALTTP2\r\nSerial Number: 1511\r\nIssue Time: 2026 Jul 04 2112 UTC\r\n\r\nALERT: Type II Radio Emission \nBegin Time: 2026 Jul 04 2043 UTC\nEstimate Velocity: 2714 km/s\nComment: \r\n\n",
"product_id": "TIIA"
},
{
"issue_datetime": "2026-07-04T21:15:03Z",
"message": "Space Weather Message Code: SUM10R\r\nSerial Number: 922\r\nIssue Time: 2026 Jul 04 2115 UTC\r\n\r\nSUMMARY: 10cm Radio Burst \nBegin Time: 2026 Jul 04 2040 UTC\nMaximum Time: 2026 Jul 04 2041 UTC\nEnd Time: 2026 Jul 04 2047 UTC\nPeak Flux: 890 sfu\nDuration: 7 minutes\nLatest Penticton Noon Flux: 161 sfu\nComment: \r\n\n",
"product_id": "BHIS"
},
{
"issue_datetime": "2026-07-04T21:16:21Z",
"message": "Space Weather Message Code: SUMX01\r\nSerial Number: 220\r\nIssue Time: 2026 Jul 04 2116 UTC\r\n\r\nSUMMARY: X-ray Event exceeded X1 \nBegin Time: 2026 Jul 04 2029 UTC\nMaximum Time: 2026 Jul 04 2041 UTC\nEnd Time: 2026 Jul 04 2047 UTC\nXray Class: X1.3\nOptical Class: \nLocation: N15W75\nNoaa Scale: R3 - Strong\nComment: \r\n\nNOAA Scale: R3 - Strong\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.\r\nRadio - Wide area blackout of HF (high frequency) radio communication for about an hour.",
"product_id": "XX0S"
},
{
"issue_datetime": "2026-07-04T23:00:54Z",
"message": "Space Weather Message Code: ALTK05\r\nSerial Number: 2038\r\nIssue Time: 2026 Jul 04 2300 UTC\r\n\r\nALERT: Geomagnetic K-index of 5 \nThreshold Reached: 2026 Jul 04 2301 UTC\nSynoptic Period: 2100-2400\nActive Warning: YES\nNoaa Scale: G1 - Minor\nComment:\r\n\nNOAA Scale: G1 - Minor\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.\r\nInduced Currents - Weak power grid fluctuations can occur.\r\nSpacecraft - Minor impact on satellite operations possible.\r\nAurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.",
"product_id": "K05A"
},
{
"issue_datetime": "2026-07-05T00:05:42Z",
"message": "Space Weather Message Code: WARK06\r\nSerial Number: 666\r\nIssue Time: 2026 Jul 05 0005 UTC\r\n\r\nCANCEL WARNING: Geomagnetic K-index of 6 expected \nCancel Serial Number: 665\nOriginal Issue Time: 2026 Jul 04 1357 UTC\nWrong date in the original end time. Warning was supposed to expire at 04/2100z.\r\n\nWrong date in the original end time. Warning was supposed to expire at 04/2100z.NOAA Scale: G2 - Moderate\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.\r\nInduced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.\r\nSpacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.\r\nRadio - HF (high frequency) radio propagation can fade at higher latitudes.\r\nAurora - Aurora may be seen as low as New York to Wisconsin to Washington state.",
"product_id": "K06W"
},
{
"issue_datetime": "2026-07-05T00:27:14Z",
"message": "Space Weather Message Code: WARK07\r\nSerial Number: 152\r\nIssue Time: 2026 Jul 05 0027 UTC\r\n\r\nCANCEL WARNING: Geomagnetic K-index of 7 or greater expected \nCancel Serial Number: 151\nOriginal Issue Time: 2026 Jul 04 0501 UTC\nWrong date in the original end time. Warning was supposed to expire at 04/1200z. \r\n\nWrong date in the original end time. Warning was supposed to expire at 04/1200z. NOAA Scale: G3 - Greater",
"product_id": "K07W"
},
{
"issue_datetime": "2026-07-05T02:56:06Z",
"message": "Space Weather Message Code: WARK04\r\nSerial Number: 5378\r\nIssue Time: 2026 Jul 05 0256 UTC\r\n\r\nEXTENDED WARNING: Geomagnetic K-index of 4 expected\nExtension to Serial Number: 5377\nValid From: 2026 Jul 03 1209 UTC\nNow Valid Until: 2026 Jul 05 1500 UTC\nWarning Condition: Persistence\n\r\n\n\r\n\r\nNOAA Space Weather Scale descriptions can be found at\r\nwww.swpc.noaa.gov/noaa-scales-explanation\r\n\r\nPotential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.\r\nInduced Currents - Weak power grid fluctuations can occur.\r\nAurora - Aurora may be visible at high latitudes such as Canada and Alaska.",
"product_id": "K04W"
}
],
"success": true
}