Previous studies have shown the formation of large diamagnetic cavities around the Earth’s magnetopause that are filled with highly energetic ions and electrons at 90 degree pitch angles. Statistical study has shown that cavity locations are consistent with expected location of magnetic bottle formation for anti-parallel or component reconnection for given IMF orientation. However, there are few cases that are not consistent with either. In this work we consider the possibility that these particles could originate from foreshock. As a first step we have analyzed MMS magnetosheath crossings to understand the IMF and SW conditions for which we see energetic particles in the magnetosheath
