ips-sws-alert -- Experimental Solar Wind Shock Alert
About ips-sws-alert	English (USA)
The shock detection algorithm used is a modification of an algorithm by A.G. Rubin, M.A. Heinman, E.W. Cliver, K.H Bounar and T.R. Detman, presented in a paper "Interplanetary Shock Detector Testing" from the proceedings of the "Evaluation of Space Weather Forecasts" workshop, held at Boulder, Colorado, June 19-21 1996. Solar wind data (velocity, density, temp, magnetic field) are correlated with a step function to determine a shock. Shocks have been arbitrarily classified into: Weak (velocity change <60km/sec), Moderate (60 < velocity chnage < 120km/sec), Strong (velocity change >120km/sec) Detection of weaker shocks is less reliable, as a distinct increase is required in all four solar wind parameters for shock detection. In addition, a change in solar wind velocity of at least 25km/sec, and a density ratio of at least 1.2 is required. NOTE: IPS Solar Wind Shock Alerts are an automated experimental product and false alarms and missed events are possible. Please read our product disclaimer on the IPS Home Page before using this alert. ACE spacecraft detector may saturate during strong proton events. During such periods shock detection is not possible. The sudden impulse alert service can provide back-up to shock alerts during such periods. To see the collection of prior postings to the list, visit the ips-sws-alert Archives.
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