surges


Also found in: Dictionary, Thesaurus, Medical, Legal, Idioms.

surges

Impulsive events on the Sun that are characterized by the ejection of chromospheric material into the inner corona with velocities of 100–200 km s–1. They occur in active regions, where they often accompany flares but more generally stem from small flarelike brightenings (termed moustaches or Ellerman bombs) at the outer edge of the penumbra of sunspots. The surge material, which is usually directed radially away from the spot, may reach a height of a couple of hundred thousand kilometers before fading or returning to the chromosphere along either a curved trajectory or, more frequently, the trajectory of its ascent. Surges typically have a lifetime of 10–20 minutes and show a strong tendency to recur. See also prominences.
References in classic literature ?
I caught sight of him toiling at the main-sheet, heaving it in and flat with his tremendous muscles, the stern of the schooner lifted high in the air and his body outlined against a white surge of sea sweeping past.
It seemed incredible that the next surge should not crush the Ghost down upon the tiny eggshell.
The sea was less boisterous, since the wind came off land--a fortunate circumstance for the boat, which would suffer, owing to its small tonnage, by a heavy surge on the sea.
Weakly I rose for the last time--my tortured lungs gasped for the breath that would fill them with a strange and numbing element, but instead I felt the revivifying breath of life-giving air surge through my starving nostrils into my dying lungs.
Power surges often occur when power is restored following service interruptions or outages.
Additionally a safety line can be added at surging conditions that if it is crossed it will further increase the surge margin in order to avoid surges in the future.
These GDTs are engineered to protect sensitive electronic equipment from surges under harsh environments including temperatures ranging from ?
The Nationwide Operational Assessment of Hazards (Project NOAH) on Tuesday warned that 23 areas including Manila are at risk of storm surges due to tropical storm Glenda.
Deadly flooding caused by storm surges will occur more frequently as the climate warms, scientists predict.
Lightning during storms causes most damaging surges, but smaller surges, many generated within your home (by vacuum cleaner motors, refrigerator compressors, etc.
Hot weeks to come: Things to pay attention to in case of power cuts and power surges
I am frequently asked whether anyone can actually differentiate between lightning-related surges and artificially generated electrical surges.