分析1970—2010年鄂尔多斯周缘发生的114次显著地震序列。结果表明，序列类型为主余型的占57%，孤立型的占32%，多震型的占11%。根据地震类型的空间分布特点对鄂尔多斯周缘地震进行分区，各分区基本上是主余型地震占多数，多震型地震主要集中在鄂尔多斯北缘和东缘中北段，孤立型地震在鄂尔多斯西缘南段、南缘和东缘南段占的比例较高。

By analyzing 114 earthquake sequences at the edge of Ordos block from 1970 to 2010, the results show that among the 114 earthquake sequences 57% is the mainshock-aftershock type, 32% for the isolated type and 11% for multi-shock type. In the three types of earthquake, the mainshock-aftershock type presents even distribution, the isolated type accounts for a rather high percentage in the southwest edge, south edge and southeast edge of the block, the multi-shock type mostly occurred in the north edge and northeast edge of the block.