speed 503.7 km/s density 4.66 protons/cm3 temperature 110258 K bt 5.29 nT bz-gsm 2.62 nT by-gsm -3.92 nT # type: reference-data # source: NOAA Space Weather Prediction Center # as-of: 2026-09-16T21:02:00Z # spacecraft: SOLAR1 # measured: 2026-09-16T21:02:00Z # note: measured about 1.5 million km upstream: conditions reach Earth roughly 30-60 minutes later # license: https://www.weather.gov/disclaimer