La traducción de estos artículos de ayuda está incompleta - Por favor contacte con nosotros si quiere ayudar a traducir

What is a coronal mass ejection?

A coronal mass ejection (or CME) is a giant cloud of solar plasma drenched with magnetic field lines that is blown away from the Sun often during strong, long-duration solar flares and filament eruptions. When the Sun isn't very active during solar minimum, coronal mass ejections are rare. There might only be one coronal mass ejection every week. When the Sun's activity increases towards solar maximum, coronal mass ejections become more common and we can see multiple coronal mass ejections every day.

The first proof of these dynamic events came from observations made with a coronagraph on the OSO 7 spacecraft between 1971 and 1973. A coronagraph produces a solar eclipse by covering the Sun with a small disk. Coronal mass ejections are very faint and can not be observed otherwise. The SOHO and STEREO missions have white-light coronagraphs onboard to detect coronal mass ejections. Coronal mass ejections are the prime source of strong geomagnetic storms and thus are very important to keep an eye on. The animation below shows a coronal mass ejection as seen by LASCO onboard the SOHO spacecraft.

A CME as seen by SOHO/LASCO

A coronal mass ejection can escape from the Sun during eruptions on the Sun like solar flares and filament eruptions. However, not every event has a coronal mass ejection accompanied with it. Strong flares (M and X-class) are likely candidates to launch coronal mass ejections but during rare occasions, even some B or C-class solar flares have launched coronal mass ejections but these are often only minor events. Another factor is the duration of the solar flare. For example, when there is a solar flare with a peak strength of X5 and with a total duration of two hours then it will certainly be accompanied with a bright, large and fast coronal mass ejection. Depending on the location of the eruption, the blast could either miss Earth, be partially or fully Earth-directed. An Earth-directed coronal mass ejection will look like a partial or full-halo coronal mass ejection on the images from SOHO. When this happens the coronal mass ejection will arrive at Earth after 24 hours or more (depending on the speed) and will likely cause a geomagnetic storm with vivid auroral displays.

<< Ir a la pagina previa

Actualmente, sobre la base de los datos actuales, no hay posibilidades de ver una aurora en las latitudes medias
La velocidad del viento solar actualmente es moderada (550,5 km/sec.)

Últimas noticias

Apoye a SpaceWeatherLive.com!

Mucha gente viene a SpaceWeatherLive para seguir la actividad del Sol o previsión de aurora, pero con esta cantidad de tráfico se incrementan los costos del servidor. ¡Considere hacer una donación si disfruta de SpaceWeatherLive para que podamos mantener el sitio web en línea!

100%

Últimas alertas

¡Obtén alertas instantáneas!

Hechos clima espacial

Último evento clase X:10/09/2017X8.2
Último evento clase M:20/10/2017M1.0
Últimas tormentas geomagnéticas:13/10/2018Kp5 (G1)
Número de días sin manchas en el año 2018:164
Estrías actual días sin manchas:2

Efemérides*

Llamarada solar
12014M4.3
22010M2.9
32000M2.5
42015M1.1
52013C8.9
ApG
1200329G1
2199926G1
3200218G2
4201617G1
5201310
*desde 1994

Redes sociales