The triggering process for coronal mass ejections (CME) in the solar atmosphere is not fully understood. We use observations from different spacecraft at several wavelengths to detect an instability process for a prominence/filament with subsequent eruption of CME. Time series of spectral lines at 304, 171, 193, and 211 A have been obtained with the SDO spacecraft, and at 304, 171, 195, and 284 A with the STEREO spacecraft. A prominence/filament system was observed during November 8-23, 2011, at different angles by SDO, STEREO_A, and STEREO_B. The observations show that a giant tornado began to develop near the base of the prominence at 20:00 UT on November 20, which later caused the appearance of droplets of coronal rain (at 16:00 UT, November 21) which fell downward from the main mass of the prominence. The coronal rain continued until 20:20 UT, November 22, and caused an instability of the prominence, after which a CME took place 22:30 UT on November 22. We assume that the loss of mass owing to coronal rain may lead to instability of prominences and their subsequent eruption. Observations of coronal rain falling from the main part of the mass of prominences could be used for predicting space weather.

中文翻译：

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SDO/AIA 和 Stereo/EUVI 观测到的太阳大气中日冕雨引发的日珥爆发

太阳大气中日冕物质抛射（CME）的触发过程尚不完全清楚。我们使用来自不同航天器的多个波长的观测来检测日珥/细丝的不稳定过程，随后 CME 喷发。SDO 航天器获得了 304、171、193 和 211 A 处的谱线时间序列，STEREO 航天器获得了 304、171、195 和 284 A 处的谱线时间序列。2011 年 11 月 8 日至 23 日期间，SDO、STEREO_A 和 STEREO_B 在不同角度观察到了一个日珥/细丝系统。观测显示，11月20日世界标准时间20:00在日珥的底部附近开始形成巨大的龙卷风，随后导致出现日冕雨滴（11月21日世界标准时间16:00），从日珥向下落下。突出的主要质量。日冕雨一直持续到世界标准时间20:20，11 月 22 日，并导致日珥的不稳定，此后于 11 月 22 日 22:30 UT 发生了 CME。我们假设由于日冕雨造成的质量损失可能导致日珥的不稳定及其随后的喷发。对从日珥的主要部分落下的日冕雨的观测可用于预测空间天气。