jgg     2012 32 (增1):  134-137    ISSN: 0412-1961  CN: 21-1139/TG APPLICTION OF Σ-Δ ADC TO MACROSEISM DATA ACQUISITION Lin Qiang 1,2) ; Li Shipeng 1,2) ; Zhu Wei 1,2) ; Guo Tangyong 1,2) ; and Wang Yajie 1,2) 1)Key Laboratory of Earthquake Geodesy,Institute of Seismology, CEA, Wuhan 430071;2)Wuhan Base of Institute of Crustal Dynamics,CEA,Wuhan 430071 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null