Space Weather: Short-term Prediction of Solar Flares and Geoeffectiveness of Solar Coronal Mass Ejections

短期（24-48小时）太阳活动预报的定量参数将由大熊和怀柔太阳观测站获得的高分辨率矢量磁图计算。这些参数包括纵向磁场结构函数（即两点相关函数）的幂律指数b和电流螺旋度的抵消指数k。来自四站全球Ha网络的数据将用于识别太阳耀斑，以便与活动区磁场的变化进行比较分析。对观测到的光球磁场进行外推，可以推断出活动区域细丝的磁场方向，进而可用于预测细丝喷发及其地球有效性。

Quantitative parameters for short-term (24-48 hours) forecasts of solar activity will be computed from high-resolution vector magnetographs obtained at the Big Bear and Huairou solar observatories. These parameters include the power-law index b of the longitudinal magnetic field structure functions (i.e., two-point correlation functions), and the cancellation exponent k of the electric-current helicity. Data from a four-station global Ha network will be used to identify solar flares for comparison analyses with changes in active region magnetic fields. Extrapolation of the observed photospheric magnetic fields will permit inferences of the field orientation in active region filaments, which in turn may be used to forecast filament eruptions and their geoeffectiveness.