jgg     2015 35 (3):  529-532    ISSN: 0412-1961  CN: 21-1139/TG

The Time Frequency Analysis of the Earth’s Free Oscillation Induced by the 
M9.0 Earthquake in East Japan Observed with the DZW Gravimeter
1 Earthquake Administration of Tianjin Municipality,7 Naihuo Road,Tianjin 300201,China
2 Institute of Disaster Prevention, Xueyuan Street, Yanjiao, Sanhe 065201, China
3 China Earthquake Networks Center,5 Nanheng Street,Beijing 100045, China
4 Tangshan Earthquake Observatory Station, Earthquake Administration of Hebei Province, Tangshan 063000, China
Received: 2014-04-10  Revised: null  Online: 2015-06-02
Supporting info