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": "2026-04-06T04:59:20Z",
"message": "Space Weather Message Code: ALTEF3\r\nSerial Number: 3667\r\nIssue Time: 2026 Apr 06 0459 UTC\r\n\r\nCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu\r\nContinuation of Serial Number: 3666\r\nBegin Time: 2026 Apr 03 0920 UTC\r\nYesterday Maximum 2MeV Flux: 5995 pfu\r\n\r\n\r\n\r\nPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.",
"product_id": "EF3A"
},
{
"issue_datetime": "2026-04-07T01:24:33Z",
"message": "Space Weather Message Code: WARK04\r\nSerial Number: 5313\r\nIssue Time: 2026 Apr 07 0124 UTC\r\n\r\nWARNING: Geomagnetic K-index of 4 expected\r\nValid From: 2026 Apr 07 0124 UTC\r\nValid To: 2026 Apr 07 1200 UTC\r\nWarning Condition: Onset\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": "2026-04-07T05:00:18Z",
"message": "Space Weather Message Code: ALTEF3\r\nSerial Number: 3668\r\nIssue Time: 2026 Apr 07 0500 UTC\r\n\r\nCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu\r\nContinuation of Serial Number: 3667\r\nBegin Time: 2026 Apr 03 0920 UTC\r\nYesterday Maximum 2MeV Flux: 6075 pfu\r\n\r\n\r\n\r\nPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.",
"product_id": "EF3A"
},
{
"issue_datetime": "2026-04-08T02:29:35Z",
"message": "Space Weather Message Code: WATA20\r\nSerial Number: 1107\r\nIssue Time: 2026 Apr 08 0229 UTC\r\n\r\nWATCH: Geomagnetic Storm Category G1 Predicted\r\n\r\nHighest Storm Level Predicted by Day:\r\nApr 09: None (Below G1) Apr 10: G1 (Minor) Apr 11: G1 (Minor)\r\n\r\nTHIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT\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": "A20F"
},
{
"issue_datetime": "2026-04-08T04:59:34Z",
"message": "Space Weather Message Code: ALTEF3\r\nSerial Number: 3669\r\nIssue Time: 2026 Apr 08 0459 UTC\r\n\r\nCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu\r\nContinuation of Serial Number: 3668\r\nBegin Time: 2026 Apr 03 0920 UTC\r\nYesterday Maximum 2MeV Flux: 7359 pfu\r\n\r\n\r\n\r\nPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.",
"product_id": "EF3A"
},
{
"issue_datetime": "2026-04-09T04:59:35Z",
"message": "Space Weather Message Code: ALTEF3\r\nSerial Number: 3670\r\nIssue Time: 2026 Apr 09 0459 UTC\r\n\r\nCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu\r\nContinuation of Serial Number: 3669\r\nBegin Time: 2026 Apr 03 0920 UTC\r\nYesterday Maximum 2MeV Flux: 7322 pfu\r\n\r\n\r\n\r\nPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.",
"product_id": "EF3A"
},
{
"issue_datetime": "2026-04-10T01:43:15Z",
"message": "Space Weather Message Code: WARK04\r\nSerial Number: 5314\r\nIssue Time: 2026 Apr 10 0143 UTC\r\n\r\nWARNING: Geomagnetic K-index of 4 expected\r\nValid From: 2026 Apr 10 0145 UTC\r\nValid To: 2026 Apr 10 1500 UTC\r\nWarning Condition: Onset\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": "2026-04-10T02:08:32Z",
"message": "Space Weather Message Code: ALTK04\r\nSerial Number: 2649\r\nIssue Time: 2026 Apr 10 0208 UTC\r\n\r\nALERT: Geomagnetic K-index of 4\r\n Threshold Reached: 2026 Apr 10 0205 UTC\r\nSynoptic Period: 0000-0300 UTC\r\n \r\nActive Warning: Yes\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": "K04A"
},
{
"issue_datetime": "2026-04-10T13:50:17Z",
"message": "Space Weather Message Code: WARK04\r\nSerial Number: 5315\r\nIssue Time: 2026 Apr 10 1350 UTC\r\n\r\nEXTENDED WARNING: Geomagnetic K-index of 4 expected\r\nExtension to Serial Number: 5314\r\nValid From: 2026 Apr 10 0145 UTC\r\nNow Valid Until: 2026 Apr 11 1800 UTC\r\nWarning Condition: Persistence\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": "2026-04-10T14:07:21Z",
"message": "Space Weather Message Code: ALTEF3\r\nSerial Number: 3671\r\nIssue Time: 2026 Apr 10 1407 UTC\r\n\r\nCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu\r\nContinuation of Serial Number: 3670\r\nBegin Time: 2026 Apr 03 0920 UTC\r\nYesterday Maximum 2MeV Flux: 10680 pfu\r\n\r\n\r\n\r\nPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.",
"product_id": "EF3A"
},
{
"issue_datetime": "2026-04-10T14:26:04Z",
"message": "Space Weather Message Code: WARK05\r\nSerial Number: 2223\r\nIssue Time: 2026 Apr 10 1426 UTC\r\n\r\nWARNING: Geomagnetic K-index of 5 expected\r\nValid From: 2026 Apr 10 1425 UTC\r\nValid To: 2026 Apr 11 0900 UTC\r\nWarning Condition: Onset\r\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": "2026-04-11T13:06:43Z",
"message": "Space Weather Message Code: ALTEF3\r\nSerial Number: 3672\r\nIssue Time: 2026 Apr 11 1306 UTC\r\n\r\nCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu\r\nContinuation of Serial Number: 3671\r\nBegin Time: 2026 Apr 03 0920 UTC\r\nYesterday Maximum 2MeV Flux: 1714 pfu\r\n\r\n\r\n\r\nPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.",
"product_id": "EF3A"
},
{
"issue_datetime": "2026-04-11T17:56:04Z",
"message": "Space Weather Message Code: WARK04\r\nSerial Number: 5316\r\nIssue Time: 2026 Apr 11 1756 UTC\r\n\r\nEXTENDED WARNING: Geomagnetic K-index of 4 expected\r\nExtension to Serial Number: 5315\r\nValid From: 2026 Apr 10 0145 UTC\r\nNow Valid Until: 2026 Apr 12 1500 UTC\r\nWarning Condition: Persistence\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": "2026-04-12T09:45:25Z",
"message": "Space Weather Message Code: WARK04\r\nSerial Number: 5317\r\nIssue Time: 2026 Apr 12 0945 UTC\r\n\r\nCANCEL WARNING: Geomagnetic K-index of 4 expected\r\nCancel Serial Number: 5316\r\nOriginal Issue Time: 2026 Apr 10 0143 UTC\r\n\r\nComment: Active conditions (Kp=4) are no longer expected to occur. \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": "2026-04-12T13:17:14Z",
"message": "Space Weather Message Code: ALTEF3\r\nSerial Number: 3673\r\nIssue Time: 2026 Apr 12 1317 UTC\r\n\r\nCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu\r\nContinuation of Serial Number: 3672\r\nBegin Time: 2026 Apr 03 0920 UTC\r\nYesterday Maximum 2MeV Flux: 1082 pfu\r\n\r\n\r\n\r\nPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.",
"product_id": "EF3A"
},
{
"issue_datetime": "2026-04-13T11:01:31Z",
"message": "Space Weather Message Code: ALTEF3\r\nSerial Number: 3674\r\nIssue Time: 2026 Apr 13 1101 UTC\r\n\r\nCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu\r\nContinuation of Serial Number: 3673\r\nBegin Time: 2026 Apr 03 0920 UTC\r\nYesterday Maximum 2MeV Flux: 1610 pfu\r\n\r\n\r\n\r\nPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.",
"product_id": "EF3A"
},
{
"issue_datetime": "2026-04-14T11:37:10Z",
"message": "Space Weather Message Code: ALTEF3\r\nSerial Number: 3675\r\nIssue Time: 2026 Apr 14 1137 UTC\r\n\r\nCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu\r\nContinuation of Serial Number: 3674\r\nBegin Time: 2026 Apr 03 0920 UTC\r\nYesterday Maximum 2MeV Flux: 1650 pfu\r\n\r\n\r\n\r\nPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.",
"product_id": "EF3A"
},
{
"issue_datetime": "2026-04-15T07:56:30Z",
"message": "Space Weather Message Code: ALTEF3\r\nSerial Number: 3676\r\nIssue Time: 2026 Apr 15 0756 UTC\r\n\r\nCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu\r\nContinuation of Serial Number: 3675\r\nBegin Time: 2026 Apr 03 0920 UTC\r\nYesterday Maximum 2MeV Flux: 1705 pfu\r\n\r\n\r\n\r\nPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.",
"product_id": "EF3A"
},
{
"issue_datetime": "2026-04-15T21:43:18Z",
"message": "Space Weather Message Code: WATA30\r\nSerial Number: 271\r\nIssue Time: 2026 Apr 15 2143 UTC\r\n\r\nWATCH: Geomagnetic Storm Category G2 Predicted\r\n\r\nHighest Storm Level Predicted by Day:\r\nApr 16: None (Below G1) Apr 17: G2 (Moderate) Apr 18: G2 (Moderate)\r\n\r\nTHIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT\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": "A30F"
},
{
"issue_datetime": "2026-04-16T13:23:26Z",
"message": "Space Weather Message Code: ALTEF3\r\nSerial Number: 3677\r\nIssue Time: 2026 Apr 16 1323 UTC\r\n\r\nCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu\r\nContinuation of Serial Number: 3676\r\nBegin Time: 2026 Apr 03 0920 UTC\r\nYesterday Maximum 2MeV Flux: 3248 pfu\r\n\r\n\r\n\r\nPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.",
"product_id": "EF3A"
}
],
"success": true
}