Sun–Earth · solar wind
The solar wind live
A continuous flow of particles leaves the Sun at a few hundred kilometres per second. Particle speed in this view follows the latest OMNI measurement; the magnetopause sits where the measured dynamic pressure puts it (Shue et al., 1998).
- Magnetopause (sub-solar point)
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- Dynamic pressure
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Solar wind speed
481 km/s
Solar wind density
5.7 cm⁻³
Interplanetary field Bz
-0.5 nT
Latest estimated Kp (SWPC)
2.33
OMNI2 hourly near-Earth solar wind and geomagnetic indices · NASA data, public domain; acknowledge SPDF/OMNIWeb and the index providers · 10/23/26
Shue et al. (1998) · Published literature; cited
Particle speed proportional to the measured speed; magnetopause from Shue et al. (1998); Earth enlarged, Sun not to scale.
Latest hour · speed
481 km/s
2026-10-13 00:00:00 UTC
OMNI2 hourly near-Earth solar wind and geomagnetic indices · NASA data, public domain; acknowledge SPDF/OMNIWeb and the index providers · 10/23/26
Latest hour · density
5.7 cm⁻³
2026-10-13 00:00:00 UTC
OMNI2 hourly near-Earth solar wind and geomagnetic indices · NASA data, public domain; acknowledge SPDF/OMNIWeb and the index providers · 10/23/26
Latest hour · Bz (GSM)
-0.5 nT
2026-09-30 01:00:00 UTC
OMNI2 hourly near-Earth solar wind and geomagnetic indices · NASA data, public domain; acknowledge SPDF/OMNIWeb and the index providers · 10/23/26
Highest hourly speed of the series
1,189 km/s
2003-10-31 03:00:00 UTC
OMNI2 hourly near-Earth solar wind and geomagnetic indices · NASA data, public domain; acknowledge SPDF/OMNIWeb and the index providers · 10/23/26
Solar wind speed, last 60 available days
OMNI2 hourly near-Earth solar wind and geomagnetic indices · NASA data, public domain; acknowledge SPDF/OMNIWeb and the index providers · 10/23/26
Show the data as a table
Proton density, last 60 days
OMNI2 hourly near-Earth solar wind and geomagnetic indices · NASA data, public domain; acknowledge SPDF/OMNIWeb and the index providers · 10/23/26
Show the data as a table
Interplanetary field Bz component (GSM), last 60 days
OMNI2 hourly near-Earth solar wind and geomagnetic indices · NASA data, public domain; acknowledge SPDF/OMNIWeb and the index providers · 10/23/26
Show the data as a table
Solar wind speed since 1963, monthly mean
OMNI2 hourly near-Earth solar wind and geomagnetic indices · NASA data, public domain; acknowledge SPDF/OMNIWeb and the index providers · 10/23/26
Show the data as a table
Highest hourly speed per year
OMNI2 hourly near-Earth solar wind and geomagnetic indices · NASA data, public domain; acknowledge SPDF/OMNIWeb and the index providers · 10/23/26
Show the data as a table
Method and sources
OMNI2 (NASA/GSFC) merges measurements from several spacecraft (IMP-8, Wind, ACE, DSCOVR…) propagated to the nose of the magnetosphere. Speed in km/s, proton density in cm⁻³, interplanetary field Bz component in GSM coordinates (nT). Hourly means are plotted as provided; the files’ fill values (999.9, 9999.) are discarded and gaps are not interpolated.
The yearly files of the last two years are re-read on each import; each run records the hash of the files read.
Reading these data
OMNI2 files are updated with a delay of weeks to months; the “latest hour” is not a real-time value. Before 1995 the coverage is sparse and the instruments differ.
SOURCES OF THIS PAGE
- Shue et al. (1998)
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Shue, J.-H., Song, P., Russell, C. T., Steinberg, J. T., Chao, J. K., Zastenker, G., et al. (1998). Magnetopause location under extreme solar wind conditions. Journal of Geophysical Research, 103(A8), 17691–17700.
· doi:10.1029/98JA01103
Licence : Published literature; cited - OMNI2 hourly near-Earth solar wind and geomagnetic indices
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King, J. H., & Papitashvili, N. E. (2005). Solar wind spatial scales in and comparisons of hourly Wind and ACE plasma and magnetic field data. J. Geophys. Res., 110, A02104. OMNI2 data from NASA/GSFC SPDF OMNIWeb; Kp/ap from GFZ Potsdam, Dst from WDC Kyoto, F10.7 from NRC Canada (Penticton).
· doi:10.1029/2004JA010649 · source page ↗
Licence : NASA data, public domain; acknowledge SPDF/OMNIWeb and the index providers · retrieved on Oct 23, 2026 · SHA-256 6de9b217bd4b…