SOHO itself has suffered several malfunctions. Last year, during a period of high solar activity and at a key time in US observations of sunspots, contact with the satellite was suddenly lost, causing research work to be interrupted for two months.
去年正逢太陽活躍期，美國在觀測太陽黑子的關鍵時刻，SOHO 搞怪般的忽然斷訊，研究因此停擺多日。