Live observations
Data collection · Checking sources…
Collection status · JSONAt a glance
Loading observation summary…
Solar wind measured at L1, before it reaches Earth. One-minute source samples; checks for updates every minute. All times are UTC.
NOAA selects the active spacecraft separately for plasma and magnetic field. Measurements are not shifted to Earth arrival time. Gaps and flagged samples are not connected on charts.
Loading solar wind observations…
Solar wind measurement details
Solar wind speed
—
Measurement unavailable
Proton density
—
Measurement unavailable
Bz
—
Measurement unavailable
Total field Bt
—
Measurement unavailable
Bx
—
Measurement unavailable
By
—
Measurement unavailable
Proton temperature
—
Measurement unavailable
Solar wind history
Loading history…
Values are operational observations, not independently validated by Argus. A delay above 10 minutes is marked “Delayed”. History resolution depends on the selected period; values are never interpolated.
Geomagnetic activity
Kp retains its three-hour intervals. Kyoto Dst is shown hourly. Both are preliminary operational data and may be revised.
Geomagnetic measurement details
Kp
NOAA SWPC · Preliminary estimate
—
Loading…
Real-time Dst
—
Loading…
Index history
Loading index history…
Blank intervals indicate missing or flagged data. Freshness allows for publication delay after an interval ends: four hours for Kp, two hours for Dst (the next native interval plus one hour).
Additional hourly indices
Hourly indices
Latest available hourly observations. Checks for updates every minute. All times are UTC.
These are normalized data; missing measurements may be interpolated or filled during processing.
S10, M10 and Y10 are calibrated GOES estimates of daily solar indices, updated from the UTC day’s available observations at each hour boundary. Midnight closes the previous day. These estimates are provisional; no forecasts are shown. A dash means no calibrated estimate is available for that hour; these indices are not gap-filled.