抄録
P-wave velocity structure down to 150km in Kanto district is determined from 418 P-wave arrival time data observed at 10 stations for 55 seismic events that occurred in the region concerned. Simultaneous determination of velocity structure, hypocenter parameters and station corrections is made by using a procedure of successive iteration of linear inversion.
The estimated P-wave velocity structure in Kanto district is 5.5km/sec at the depth of 0-5km, 6.3km/sec at 5-30km, 7.86km/sec just below the M-discontinuity, 8.14km/sec at about 60km, 8.0km/sec at 70-100km, and 8.1km/sec at 100-150km.
