Abstract:On basis of measured shear wave velocity data of a large number of boreholes in the Shuozhou seismic zoning,adopting the linear model,exponential model and polynomial function model,the statisti-cal relationship between shear wave velocity of conventional soil and depth changes in different geological units,different field types and soil physical states was established by using the least squares method.The results show that the shear wave velocity and buried depth in 4 geological units is nonlinear,and its sub-section is obvious.The fitting relation and fitting parameters of various soil types were optimized by taking the goodness of fit as the evaluation index,w hich show s that the fitting degree of quadratic polynomial function model is better than that of linear model and power function model.In order to verify the reliabili-ty of the selected fitting formula,shear wave velocity was measured by boreholes in different geological u-nits.The result shows that the predicted shear wave velocity of the fitting formula is consistent with the measured shear wave velocity,it can serve as a reference for the shear wave velocity test in this area and make up for the blank of the research in this area.

Abstract:Based on earthquake damage assessment and macro-observation,the macrointensity of Zhangbei Ms6.2 earthquake is determined with the 2 criterion of damage degree and index.The intensity of meizoseismal region is Ⅷ degree.The distribution is along NWW and NNE two directions,but mostly in NWW direction.The area of the meizoseismal region is about 135km2.The Ⅶdegree region stretches NE and NW two directions with an area of 340km2,but the SE direction doesn't stretch enough.The wounded people concentrated mostly in Ⅷ and Ⅶ degree rgeion.The Ⅵ degree region stretches along NE and NW direction with an area of 1000km2,but the NW and SW direction stretches larger.The macroseismic epicenter is about 41°09′N，114°27′E.There are three anomalous intensity areas,which located in the three offsets that the meizoseismal region stretches.The reason that intensity isn't high but damage is serious is discussed here.Neither surface fault nor great active fault of alluvium period is found in the quake region.The main direction of NWW for meizoseismal region is consistent with a small earthquake belt appeared before the event,which hints some causes relations.

Abstract:Based on former earthquake quick report system and WeChat platform ,the earthquake informa‐tion WeChat automatic release system implements the WeChat “Southern Guangdong Earthquake Mitiga‐tion Disaster” quickly and automatically publishing earthquake information in WeChat platform .This pa‐per describes the design model ,the key technology ,the application in the earthquake field ,and system de‐velopment train of thought to expand in the future .