汶川地震； 映秀-北川断裂；活动分段特征； 地震震级；强震复发周期；
Wenchuan earthquake; Yingxiu-Beichuan fault; activity segmentation; assessment of earthquake magnitude; recurrence interval of strong earthquake;
在龙门山断裂带中段的北川地区进行了土壤氡浓度随时间的动态变化定点观测。
The dynamic variation of the Radon-density in soil with the lapse of time has been obtained from surveying at fixed position in Beichuan area along the middle part of the Longmenshan fault zone.
在龙门山断裂带中段的北川地区进行了土壤氡浓度随时间的动态变化定点观测。
The dynamic variation of the Radon-density in soil with the lapse of time has been obtained from surveying at fixed position in Beichuan area along the middle part of the Longmenshan fault zone.
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