Scholarlink

<p>Electromagnetic emissions of lower-band chorus and exohiss waves are known to interact with electrons in the Earth’s outer radiation belt. Understanding statistical properties of these natural emissions is essential for modeling space weather hazards and protecting satellite infrastructure. Despite extensive previous studies, their spatiotemporal characteristics remain incompletely understood. Here, we analyze a large data set of spacecraft measurements, showing that distributions of wave amplitudes exhibit a wide log-normal core with an irregular heavy tail, changing with geomagnetic activity and location. The distribution of time intervals between wave detections follows a power&#xa0;law, suggestive of temporal bunching. Around local noon, we nearly always detect waves up to high latitudes, while intense waves occur for less than a few percent of the time, predominantly in the postmidnight equatorial region. Our findings indicate that the burstiness of whistler-mode waves may not be fully captured by long-term averages, which are commonly used in radiation belt modeling.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Spatiotemporal patterns of lower-band whistler mode waves in the magnetosphere of Earth

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月30日

查看全文
  • O. Santolík,
  • I. Kolmašová,
  • U. Taubenschuss,
  • M. Hanzelka

摘要

Electromagnetic emissions of lower-band chorus and exohiss waves are known to interact with electrons in the Earth’s outer radiation belt. Understanding statistical properties of these natural emissions is essential for modeling space weather hazards and protecting satellite infrastructure. Despite extensive previous studies, their spatiotemporal characteristics remain incompletely understood. Here, we analyze a large data set of spacecraft measurements, showing that distributions of wave amplitudes exhibit a wide log-normal core with an irregular heavy tail, changing with geomagnetic activity and location. The distribution of time intervals between wave detections follows a power law, suggestive of temporal bunching. Around local noon, we nearly always detect waves up to high latitudes, while intense waves occur for less than a few percent of the time, predominantly in the postmidnight equatorial region. Our findings indicate that the burstiness of whistler-mode waves may not be fully captured by long-term averages, which are commonly used in radiation belt modeling.