2025 THEMIS SCIENCE NUGGETS

SUMMARIES OF THEMIS RESEARCH

By utilizing in-situ measurements of multiple spacecraft together with THEMIS ground-based magnetometers, we for the first time determine the extreme compression of the magnetopause from higher than 10 R E down to 5 R E . This observation of such severe deformation is also consistent with the prediction of the theoretical model. Read more.

While numerous studies have explored fast and slow ion flows and dawn-dusk asymmetries in the plasma parameters within the plasma sheet, questions remain about how these flows and plasma properties evolve throughout the substorm cycle, particularly the statistical distributions of earthward and tailward flows and asymmetries in ion density and pressure during different phases. Read more.

In this study, we examine how different types of solar wind and the presence of an upstream foreshock might explain why the real observed magnetopause sometimes does not match model predictions, using data from spacecraft missions in near-Earth space (Cluster, THEMIS and MMS). Read more.

In this study we combine THEMIS satellite measurements above the ionosphere with GPS receiver and magnetometer measurements below the ionosphere, along with lists of earthquakes and other surface disturbances, to isolate and study conditions when plasma waves above the ionosphere affect electron dynamics in the ionosphere. Read more.