The geomagnetic Kp index is one of the most extensively used indices of geomagnetic activity, both for scientific and operational purposes. This article reviews the properties of the Kp index and provides a reference for users of the Kp index and associated data products as derived and distributed by the GFZ German Research Centre for Geosciences. The near real‐time production of the nowcast Kp index is of particular interest for space weather services and here we describe and evaluate its current setup.

中文翻译：

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地磁Kp指数和地磁活动度的推导指标

出于科学和运营目的，地磁Kp指数是最广泛使用的地磁活动指数之一。本文回顾了Kp指数的属性，并为GFZ德国地球科学研究中心派生和分发的Kp指数和相关数据产品的用户提供了参考。临近天气预报的Kp指数的近乎实时的生成对于空间天气服务特别重要，在这里我们描述和评估其当前设置。