Type II radio emission detected at 15:29 UTC with estimated velocity of 1057 km/s

A Type II Radio Emission was detected on July 26, 2026, starting at 15:29 UTC. The estimated velocity of the associated coronal shock wave was reported at 1057 km/s.

Type II radio emissions are produced by magnetohydrodynamic shock waves traveling through the solar corona, and they are often indicative of a coronal mass ejection (CME) or a strong solar flare. The detection of such emissions signals a rapid and forceful solar eruption, which may be associated with potential impacts to radio communications and navigation signals in space and on Earth, according to established space weather scales.

Analysis of today’s solar events reveals a possible association between this Type II radio emission and the M3.2 flare from Region 4494, which began at 15:17 UTC and peaked at 15:28 UTC, just prior to the radio emission’s onset at 15:29 UTC. This temporal proximity suggests the shock wave may have been triggered by this flare.

NOAA’s daily forecast discussion noted that overall solar activity was low, with background flux at C-levels and no new Earth-directed CMEs observed in coronagraph imagery. The general outlook expects low solar activity to continue, with only a decreasing chance for M-class flares over the coming days. The solar wind environment is expected to return to background conditions by July 26, with minor geomagnetic activity possible from weak CME influences later in the period.