jgg     2010 30 (Supp.2):  14-17    ISSN: 0412-1961  CN: 21-1139/TG CALCULATION OF FOCAL DEPTH BY USE OF sPn PHASE IN INNER MONGOLIA Liu Fang Earthquake Administration of Inner Mongolia Autonomous Region,Hohhot 010010 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null