substorm

noun

sub·storm ˈsəb-ˌstȯrm How to pronounce substorm (audio)

: a disturbance in the magnetosphere that manifests as increased activity in the aurora (see aurora sense 3) and that is caused by an influx of high-energy particles from the sun (as from a solar flare)

Even when the sun is being well behaved, parcels of plasma shoot sporadically toward Earth's dark side, prompting a bright aurora and intensifying radiation belts. These events, called substorms, last only a few hours, but they occur several hundred times a year and are quite capable of disrupting satellites …

Tim Beardsley

Example Sentences

Recent Examples on the Web Ninety seconds after the satellites sensed the substorm starting, ground observatories witnessed a Northern Lights display suddenly brighten and dance.

Brandon Keim, WIRED, 24 July 2008

Word History

First Known Use

1961, in the meaning defined above

单词	substorm
释义	substorm noun sub·storm ˈsəb-ˌstȯrm : a disturbance in the magnetosphere that manifests as increased activity in the aurora (see aurora sense 3) and that is caused by an influx of high-energy particles from the sun (as from a solar flare) Even when the sun is being well behaved, parcels of plasma shoot sporadically toward Earth's dark side, prompting a bright aurora and intensifying radiation belts. These events, called substorms, last only a few hours, but they occur several hundred times a year and are quite capable of disrupting satellites … Tim Beardsley Example Sentences Recent Examples on the Web Ninety seconds after the satellites sensed the substorm starting, ground observatories witnessed a Northern Lights display suddenly brighten and dance. Brandon Keim, WIRED, 24 July 2008 Word History First Known Use 1961, in the meaning defined above
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