CSESpy: A unified framework for data analysis of the payloads on board the CSES-01 and CSES-02 satellites with applications to Earthquake studies.

The China Seismo-Electromagnetic Satellite (CSES) mission provides in-situ measurements of plasma parameters, electromagnetic fields, and energetic particles in the topside ionosphere, with the primary objective of characterizing ionospheric disturbances associated with seismic activity and solar–terrestrial interactions. In this context, we present CSESpy (Papini et al., 2025), a Python package that offers streamlined access to CSES Level 2 data products and expedites higher-level analysis and visualization across multiple payloads and both CSES-01 and CSES-02 spacecraft. ​Here, we illustrate the capabilities of CSESpy through a typical use case: the characterization of coseismic ionospheric electromagnetic anomalies associated with the 14 August 2021 Haiti earthquake (Recchiuti et al., 2023). Building on this case study, CSESpy is then used to extend the search for ionospheric electromagnetic anomalies to all geographic locations sampled by CSES, exploiting the full data set. The results demonstrate the potential of CSESpy as a powerful tool for systematic earthquake studies and for the investigation of complex events involving coupled variations across multiple physical observables in the near-Earth electromagnetic environment.

References

[1] Papini, E., Follega, F. M., Battiston, R., & Piersanti, M.: CSESpy: A unified framework for data analysis of the payloads on board the CSES satellite, Remote Sensing, 17(20), 5070, 2025, doi:10.3390/rs17205070

[2] Recchiuti, D., D’Angelo, G., Piersanti, M., Di Ruzza, S., Cicone, A., & Battiston, R.: Detection of electromagnetic anomalies over seismic regions during two strong (Mw > 5) earthquakes, Frontiers in Earth Science, 11, 1152343, 2023, doi:10.3389/feart.2023.1152343.