Throat auroras frequently observed near local noon have been confirmed to correspond to magnetopause indentations, but the generation mechanisms for these indentations and the detailed properties of throat aurora are both not fully understood. Using all‐sky camera and magnetometer observations, we reported some new observational features of throat aurora as follows. (1) Throat auroras can occur under stable solar wind conditions and cause clear geomagnetic responses. (2) These geomagnetic responses can be simultaneously observed at conjugate geomagnetic meridian chains in the Northern and Southern Hemispheres. (3) The initial geomagnetic responses of throat aurora show concurrent onsets that were observed at all stations along the meridians. (4) Immediately after the concurrent onsets, poleward moving signatures and micropositive bays were observed in the X components at higher‐ and lower‐latitude stations, respectively. We argue that these observations provide evidence for throat aurora being generated by low‐latitude magnetopause reconnection. We suggest that the concurrent onsets reflect the instantaneous responses of the reconnection signal arriving at the ionosphere, the followed poleward moving signatures reflect the antisunward dragging of the footprint of newly opened field lines, and the micropositive bays may result from a pair of field‐aligned currents generated during the reconnection. This study may shed new light on the geomagnetic transients observed at cusp latitude near magnetic local noon.

中文翻译：

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在安静的太阳风条件下观测到的咽喉极光的同时发作和向后传播的地磁响应的半球共轭。

已经证实，经常在局部正午附近观察到的喉头极光对应于磁更年期凹痕，但是这些凹痕的产生机理和喉头极光的详细特性均未得到充分理解。通过使用全天候相机和磁力计观测，我们报告了喉咙极光的一些新观测特征，如下所示。（1）喉头极光可在稳定的太阳风条件下发生，并引起清晰的地磁响应。（2）在北半球和南半球的共轭地磁子午线中可以同时观察到这些地磁响应。（3）咽部极光的初始地磁响应显示出在沿子午线所有站点同时观测到的同时发作。（4）并发发作后，高纬度站和低纬度站的X分量分别为。我们认为，这些观察结果为低纬度的更年期重新连接所产生的喉极光提供了证据。我们建议同时发生的起跳反应反映了重新连接信号到达电离层的瞬时响应，随后的极向运动特征反映了新打开的场线足迹的反日向阻力，并且微正向湾可能是由一对场对准引起的重新连接期间产生的电流。这项研究可能会为在磁性局部正午附近的尖顶纬度处观测到的地磁瞬变提供新的启示。