极光通常只在地球两极出现,不过本月10日晚间,强烈太阳风暴使远在墨西哥、南欧及南非的民众也能一睹壮观极光秀。然而,极光缤纷色彩底下却潜藏着威胁,明年底前恐有更多太阳风暴来袭。
欧洲太空总署(European Space Agency)太空安全计划协调员维斯皮埃伦(Quentin
Verspieren)告诉法新社:“我们必须了解,在这美景背后存在着危险。”
美国太空气象预报中心(Space Weather PredictionCenter)营运长贝特维(Mike
Bettwy)表示,他们关注的是太阳风暴“更凶险的潜在影响”,例如导致电网与卫星故障,或者让太空人暴露于达到危险程度的辐射底下。
全球数地最近出现极光,是2003年以来最强烈的地磁风暴所引起。那年10月的“万圣节风暴”导致瑞典停电,南非的电力基础设施也受到破坏。
贝特维指出,这次太阳风暴造成的损害似乎比较轻微,不过卫星公司通常得耗费数周才能发现出了什么问题。
他告诉法新社,有通报指出,太阳风暴导致美国一些自驾农用拖拉机的全球卫星定位系统(GPS)失效,拖拉机也因此停摆。
根据贝特维,大部分国家已改良电网,应能避免再陷入长期停电窘境。不过他仍建议民众准备紧急救难包,以免发生停电一两天的状况;贮存淡水或许也派得上用场,以防过滤设备因断线无法运作。
贝特维强调自己无意“灌输恐惧”,但幅射可能也能“穿透”在北极附近飞行的飞机机身。不过他又补充说,航空公司为避免这种情况,有时会在极端太阳风暴期间更改航线。
同时,欧洲太空总署太空气象服务协调员葛洛佛(Alexi Glover)告诉法新社,太阳活动“绝对还没结束”。
贝特维也说,太阳活动才刚接近其约11年周期的巅峰,因此“现在到明年底之间”出现另一场强烈太阳风暴的可能性最高。
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