Hot Flow Anomalies Delimiting Traveling Foreshocks
- 1Universidad Nacional Autonoma de Mexico, Geophysics Institute, Space Science Department, Mexico (primoz@igeofisica.unam.mx)
- 2Space and Atmospheric Physics Group, Department of Physics, Imperial College London, London, UK
- 3Department of Physics, University of Helsinki, Helsinki, Finland
- 4Imperial College London, London, United Kingdom
- 5Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA USA
- 6Johns Hopkins University - Applied Physics Laboratory
- 7Catholic University, Washington, DC USA
- 8Shandong University at Weihai, Weihai, China
- 9Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China
- 10NASA/GSFC, Greenbelt, MD USA
- 11Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK USA
- 12Solana Scientific Inc, Solana Beach, CA USA
- 13Institute of Space Science and Applied Technology, Harbin Institute of Technology (Shenzhen), Shenzhen, China
- 14Physics Department, Auburn University, USA
- 15ESA/ESTEC, Keplerlaan 1, 2200 AG Noordwijk, The Netherlands
- 16USP—Lorena School of Engineering, Lorena, Brazil
- 17CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Science, University of Science and Technology of China, Hefei, China
- 18Collaborative Innovation Center of Astronautical Science and Technology, Hefei, China
Transient upstream mesoscale structures (TUMS) are an important topic in the field of research of the near-Earth environment. These events form upstream of the Earth's bow shock and can perturb regions downstream it, i.e. magnetosheath and magnetopause. They can even affect the magnetosphere and ionosphere causing a range of space weather phenomena during periods without noticeable solar activity. There is still much to learn about the TUMS and the way they interact with the near-Earth environment. We are only beginning to understand how the different types of the TUMS relate to each other. In the past it has been shown that traveling foreshocks may contain foreshock cavitons, spontaneous hot flow anomalies and foreshock compressional boundaries (FCB). Here we present the first evidence, that traveling foreshocks may be bounded on at least one of their edges by hot flow anomalies (HFA) and by events that look like hybrids between HFAs and FCBs. We show two case studies observed by the Cluster and MMS constellations. Such studies enable us to better understand all the ways in which the solar-terrestrial interactions occur.
How to cite: Kajdic, P., Blanco-Cano, X., Rojas Castillo, D., Archer, M., Turc, L., Pfaum-Kempf, Y., LaMoury, A., Liu, T., Raptis, S., Vinicius, M., Lee, S., Shutao, Y., Hao, Y., Sibeck, D., Zhang, H., Omidi, N., Wang, B., Lin, Y., and Escoubet, P.: Hot Flow Anomalies Delimiting Traveling Foreshocks, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-4145, https://doi.org/10.5194/egusphere-egu24-4145, 2024.
