Although the region had experienced moderate seismic activity in the past, the city of Tangshan has been built on unstable, alluvial soil.
过去该地区曾经历过中度地震活动，唐山市的地基不稳定，土壤为冲积土质。
The data obtained from the temporal digital seismic stations in Luanxian sub-area of Tangshan region are processed by using this method.
并应用此方法对唐山滦县地区临时数字地震台网的资料进行了处理。
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