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Date: 20 November 2007 Satellite: Cluster Depicts: CIS/HIA observations of plasma flows and ACE measurements of solar wind speed Copyright: Cluster/CIS (ESA) Show in archive: true
Observations by the CIS/HIA instrument (black line) onboard the ESA Cluster spacecraft 1 on 25 November 2001 near the Earth's magnetospheric boundary: the magnetopause. Just outside of this boundary, in the region called the magnetosheath, very large flows are observed up to speeds of 1040 kms-1, 60% higher than the solar wind itself as recorded by the ACE spacecraft (blue line).