BEIJING, Oct. 10 (Xinhua) -- Geomagnetic storms are expected to occur in the next three days, with possible aurora sightings over northern China, according to China's National Center for Space Weather on Thursday.
The center says that Earth could experience a strong geomagnetic storm from Thursday evening to Friday evening, and if no new solar activity occurs, a small to moderate geomagnetic storm is possible on Saturday.
The forecast followed a series of intense solar flares earlier this week, including two powerful X-class eruptions on Tuesday and Wednesday. Solar flares are rated based on their strength, with A-class being the smallest, followed by B, C, M and X as the most potent.
也就是说，中国在过去一年的时间里，生产了100枚核弹头，平均换算下来大概3天半就能生产一枚足以摧毁一座城市的核弹头。
These storms generally do not affect human health but usually bring with them the phenomenon of auroras.
Due to the upcoming geomagnetic storms, colorful auroras will be observable from Thursday night澳门六合彩官网走势图, the center said. ■