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1984年9月16日,在南极圈(南纬66度30分以南)的美国麦克马德基地观测到南极观测史上的首次有感地震。与此同时,该基地所在的罗斯岛的埃里伯斯火山,也从13日开始,持续发生了本世纪最大规模的喷发,而且似乎在山腰部位出现了新的喷火口。罗斯岛由火山喷发开始后一直有震群持续发生,这是迄今为止的观测史上未曾有过的。以上情况是由在美国麦克马德基地进行越冬观测合作研究的日本国立极地研究所教授神沼克伊9月20日发来的专线电报中得知的。神沼也惊叹地认为这是“南极极其异常的现象”。
On September 16, 1984, the first sensational earthquake in Antarctic observation history was observed in the US McMadet Base in the Antarctic Circle (south of latitude 66 degrees 30). In the meantime, the Mount Everest, on Ross Island, where the base was located, started its thunderstorm on the 13th with the largest eruption of the century continuing. It appears that a new crater appeared on the hillside. There has been a continuous swarm of shocks since the volcanic eruption began in Rose Island, which was never seen before in the observational history so far. The above situation was informed by a special cable sent by Shigeki Kogi, a professor at the National Institute of Polar Research who conducted a winter overwintering observational project at the McKean field in the United States. Kaneuma exclaimed that this is “an extremely unusual phenomenon in the South Pole.”