A database of MMS bow shock crossings compiled using machine learning

Abstract

Identifying collisionless shock crossings in data sent from spacecraft has so far been done manually. It is a tedious job that shock physicists have to go through if they want to conduct case studies or perform statistical studies. We use a machine learning approach to automatically identify shock crossings from the Magnetospheric Multiscale (MMS) spacecraft. We compile a database of those crossings including various spacecraft related and shock related parameters for each event. Furthermore, we show that the shocks in the database have properties that are spread out both in real space and parameter space. We also present a possible science application of the database by looking for correlations between ion acceleration efficiency at shocks and different shock parameters such as ${\theta }_{Bn}$ and $M_A$. Furthermore, we investigate statistically the ion acceleration efficiency. We find no clear correlation between the acceleration efficiency and $M_A$ and we find that quasi-parallel shocks are more efficient at accelerating ions.

References in corpus (4)

• Observational Evidence for Stochastic Shock Drift Acceleration of Electrons at the Earth's Bow Shock
• The Dynamics of a High Mach Number Quasi-Perpendicular Shock: MMS Observations
• Unsupervised classification of simulated magnetospheric regions
• MMS direct observations of kinetic-scale shock self-reformation

Cited by in corpus (7)

• Backstreaming ions at a high Mach number interplanetary shock: Solar Orbiter measurements during the nominal mission phase
• Ion Reflection by a Rippled Perpendicular Shock
• Drivers of Magnetic Field Amplification at Oblique Shocks: In-Situ Observations
• Multi-Mission Observations of Relativistic Electrons and High-Speed Jets Linked to Shock Generated Transients
• Criteria for ion acceleration in laboratory magnetized quasi-perpendicular collisionless shocks: when are 2D simulations enough?
• Occurrence of Non-Stationarity at Earth's Quasi-Perpendicular Bow Shock
• Statistical analysis of interplanetary shock waves measured by a Solar Wind Analyzer and a magnetometer onboard the Solar Orbiter Mission in 2023