On the night of 29/30 October 1987 a giant pulsation (Pg) was recorded on the EISCAT magnetometer cross and the U.K. Sub-Auroral Magnetometer Network (SAMNET), accompanied by a variation in auroral luminosity with an identical periodicity of 77 s. Coincident all-sky image data showed that the auroral emissions arose from a series of pulsating patches (which exhibited lifetimes of the order 5–15 s) whose occurrence was modulated with a 77 s periodicity. At several times during this event, a new type of pulsating auroral patch was observed. These data provide a unique example of the auroral precipitation signature during a Pg event.
Pulsating Auroral Forms and Their Association with Geomagnetic Giant PulsationsPlanetary and Space Science
Citation InformationTaylor, M.J., G. Chisham, and D. Orr, Pulsating auroral forms and their association with geomagnetic giant pulsations, Planet. Space Sci., 37, 1477, 1989.