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1986年第三季度的全球地震活动属于中等以上水平。美洲西海岸地震带的地震活动仍很活跃。萨尔瓦多的一次中强震造成很大损失。中国台湾地区目前处于强地震的活跃幕。大洋岛弧带的地震活动与1985年持平。亚欧带东段地震较为频繁。罗马尼亚弗朗恰地区又发生一次强烈的中深震。
Global seismic activity in the third quarter of 1986 belonged to above average level. Earthquake activity on the western coast of the Americas is still active. A moderate earthquake in El Salvador caused a great loss. Taiwan is currently active in a strong earthquake. The seismic activity of the Oceanic arc belt remained unchanged from 1985. The East Asia-Europe earthquake is more frequent. A strong middle-deep earthquake took place again in the region of France and Romania.