Abstract:
The coda-wave-attenuation-quality factor Q0 in Southern and southwestern Yunnan is estimated using Aki`s single-scattering attenuation model based on 283 digital seismic waveforms recorded by 14 regional digital seismic stations within 50km from January 2005 to September 2010.The result shows that the relationship between Q0 and f of southern Yunnan can be described as Qc(f)=65.7f 0.83,the relationship between Q0 and fof southwest Yunnan can be described as Qc(f)=64.5f 0.903.The values are a little higher compared with the other areas of Yunnan with strong tectonic seismic activity,but steel belongs to inferior level ,and it belongs to the tectonic activity area.Changes of coda wave attenuation Q-1c is close to Wuding and Shidian area of Yunnan,all have the low Qc value features of active tectonic movement and frequency seismic activity.