Station Calibration and Regionalization in China and Surrounding Areas
Abstract
NMSU seismologists, in conjunction with seismologists from the Institute of Geophysics of the China Seismological Bureau (IG/CSB), have collected seismic data to calibrate International Monitoring System stations in China and document propagation characteristics of regional phases in China. Much of the work is focused on the Annual Bulletin of Chinese Earthquakes. We obtained copies of these bulletins for 1983-1995. A tomographic image of Pn velocity beneath China was made and regional travel-time curves for CSDN and IMS stations were produced. Locations from the bulletin were compared with those obtained by the Preliminary International Data Center for 1995. Seismograms from CSDN stations in China and from temporary PASSCAL experiments were collected to examine the regional phase characteristics of Sn and Lg phase propagation. Sn waves propagate only in cratonic regions of China and southern Tibet where Indian Shield under thrusts it. Lg propagates efficiently throughout most eastern and northern China but is highly attenuated within the Tibetan Plateau. We used regional waveform data collected from three broadband PASSCAL experiments in Tibet to estimate Lg Q values.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2005
- Accession Number
- ADA430255
Entities
People
- James Ni
- Thomas Hearn
Organizations
- New Mexico State University