Fig. 6

Magnetic compression at a hot flow anomaly on August 5, 2008. a–d The magnetic field observed by Kaguya (black curves) in SSE coordinates and by ACE (gray curve) in the GSE coordinate system shifted by a travel time of 1.04 h from ACE to Kaguya. e Magnetic connection between Kaguya and the dayside (red) or nightside (blue) surface of the moon. f Ion density and g–j bulk velocity observed by MAP/PCE. Pink, orange and red curves are measurements from IEA, IMA sensors and their combination. Gray dots are upstream solar wind parameters observed by ACE. k The position of Kaguya in SSE coordinates. The yellow line shows \(\sqrt {y_{{SSE}}^{2} + z_{{SSE}}^{2} }\) normalized by the lunar radius. Vertical dashed lines mark Kaguya crossings of the boundary of the shadow of the moon