The auroral oval is a well-established concept, introduced more than five decades ago. The Alfvénic oval, on the other hand, is a very recent concept, which has been revealed in both observational and numerical studies. This is the first review of the global Alfvénic oval, while also defining primary, secondary and tertiary layers of the Alfvénic oval. The focus lies on the large-scale dynamic properties of the global Alfvénic oval in relation to the AE index, substorm phases, storm phases and solar wind/IMF conditions. Statistical data recorded above and below the nominal auroral acceleration region are reviewed, together with results from global simulation studies that have reproduced the Alfvénic oval. The Alfvénic oval's relation to the auroral oval is also reviewed. This review demonstrates that the Alfvénic oval is well enough defined and investigated to give it its name, and it demonstrates that our understanding allows for the prediction of the Alfvénic oval under various conditions.

极光椭圆形是一个公认的概念，是在五十多年前引入的。另一方面，Alfvénic椭圆形是一个非常新的概念，已在观察和数值研究中得到揭示。这是对全球Alfvénic椭圆形的首次回顾，同时也定义了Alfvénic椭圆形的主要，次要和第三层。重点在于相对于AE的全球Alfvénic椭圆形的大规模动力学特性指数，亚暴雨阶段，暴风雨阶段和太阳风/ IMF条件。审查了记录在标称极光加速区域上下的统计数据，以及再现了Alfvénic椭圆形的全球模拟研究的结果。还回顾了Alfvénic椭圆形与极光椭圆形的关系。这篇综述证明了Alfvénic椭圆的定义和研究足够明确，并为其命名，并且表明我们的理解允许在各种条件下对Alfvénic椭圆进行预测。