The US National Weather Service recommends placing sensors at least 100 feet from paved or concrete surfaces.
美国国家气象局的建议是在离已铺好的或特定的表面至少100英尺的地方放置传感器。
Geomagnetic storms usually last 24 to 48 hours — but some could last for many days, read a statement from the us National Weather Service.
美国国家天气气象局的报道陈述说，地球磁暴通常持续24至48小时——但是个别能持续几天时间。
Geomagnetic storms usually last 24 to 48 hours — but some could last for many days, read a statement from the us National Weather Service.
美国国家天气气象局的报道陈述说，地球磁暴通常持续24至48小时——但是个别能持续几天时间。
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