The solar wind proton speed registered by the CELIAS/PM sensor on SOHO during the time of passage of the shock wave driven by the CME of 14 July. The propagation time of the shock was about 28 hours, implying an average shock speed of about 1500 km/s. The solar wind speed after the shock is about twice the typical solar wind speed. Relatively large uncertainties are caused by the exceptionally high background produced by energetic flare particles. The SOHO What's New page has more information about the event.
