Solar Mass Ejection Imager (SMEI) observations of coronal mass ejections (CMEs) in the heliosphere

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Interplanetary Physics: Coronal Mass Ejections (7513), Interplanetary Physics: Ejecta, Driver Gases, And Magnetic Clouds, Space Weather: Magnetic Storms (2788), Solar Physics, Astrophysics, And Astronomy: Prominence Eruptions, Interplanetary Physics: Solar Wind Sources

Scientific paper

The Solar Mass Ejection Imager (SMEI) on the Coriolis spacecraft has been obtaining white light images of nearly the full sky every 102 minutes for three years. We present statistical results of analysis of the SMEI observations of coronal mass ejections (CMEs) traveling through the inner heliosphere; 139 CMEs were observed during the first 1.5 years of operations. At least 30 of these CMEs were observed by SMEI to propagate out to 1 AU and beyond and were associated with major geomagnetic storms at Earth. Most of these were observed as frontside halo events by the SOHO LASCO coronagraphs.

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