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In this study, we analyze nine CMEs from the Sun to Earth as observed in boththe remote sensing and in situ data sets. To date, this is the largest study ofEarth impacting CMEs using the multi-view point remote sensing and in situdata. However, the remote sensing and in situ data of the same CME cannot bedirectly compared. Thus, we use several models to parameterize the two datasets. With the model results, we are able to compare the arrival time, Earthimpact speed, internal magnetic field, size and orientation as derived from theremote sensing and in situ methods. From the derived kinematics, we compare thepredicted arrival times and impact velocities with the in situ data. We findthat even with nearly continuous observations and the best available model ofthe CME structure, there is still a significant error in the predicted values.We estimate the various forces acting on the CME as predicted by threetheoretical models of CME propagation and expansion and compare these resultswith the observational results. We find that the flux rope model of Chen (1989)provides the best agreement with the observations. With the flux rope model, weare able to predict the internal magnetic field of the CME near Earth from theremote sensing data to an order of magnitude. Finally, we compare the size andorientation of the CMEs as predicted from the remote sensing and in situ data.We find very little agreement between the values derived from the two datasets.

Investigation of the Forces that Govern the Three-Dimensional Propagation and Expansion of Coronal Mass Ejections from Sun to Earth