A Unique Combination of Equatorial Plasma Bubble Morphologies Occurring Within a 12 deg Longitude Range | CU Experts

; On 12 October 2020, the NASA’s Global-scale Observations of the Limb and; Disk (GOLD) mission observed three differently shaped EPBs within a; 12; o; longitude range, near the subsatellite point. One; is straight aligned to the magnetic field line, whereas the poleward; extensions of the others are tilted eastward and westward from the; magnetic field line resembling a C-shape and reversed C-shape; structures. These EPBs were inside the GOLD imager’s field-of-view for a; period of ~3 hours. This allowed us to compute their; zonal motion and determine their drift velocities. EPBs’ drift; velocities were derived from measuring their longitudinal shifts at the; magnetic equator and at both EIA crests. This unique observation,; showing three morphologies in a narrow longitude sector, indicates the; occurrence of strong longitudinal gradients in the typical parameters; associated with the dynamics of EPBs, like neutral winds, electric; fields, or other parameters within such a narrow longitude range.;

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