展览会上,介绍了我国成功预报四川省松潘县和平武县之间地震的情况.这是我国对无前震型地震首次做出准确的中期、短期和临震预报的实例.震中地区没有明显前震.确实给临震预报带来很大困难.但是,地震部门依据阴显的前兆和“三起三落”的宏观异常现象做出了短期和临震预报.地震工作者用科学仪器监测出松潘等地区的地震波速比异常、地段相对隆起、水氡大幅度上升和地电阻率缓慢下降等,及时做出中期预报:松潘、茂汶在1976年可能发生6级或6级以上地震.地震部门还根据井水变色变味、泉水干枯、天然气冲出地面等宏观异常现象,提出短期预报:6月、7月内 At the exhibition, the successful prediction of earthquakes between Songpan County and Pingwu County in Sichuan Province was introduced, which is the first time that China made accurate mid-term, short-term and imminent earthquake prediction for a quake-less earthquake. Indeed did bring great difficulties to the prediction of the imminent earthquake, but the earthquake department made short-term and imminent earthquake prediction based on the obvious precursor and the macro abnormal phenomenon of “three ups and downs.” Earthquake workers used the scientific instruments to monitor Songpan Such as anomalous seismic wave velocity ratios, relative uplift of lots, substantial increase of water radon and slow decline of ground resistivity, so that a medium-term forecast can be made in time: Songpan and Maowen may have earthquakes of magnitude 6 or above in 1976. Seismological departments Also according to the well water discoloration and taste change, dry spring, natural gas out of the ground and other macro anomalies, proposed short-term forecast: June, July