@ ŒfÚŽGŽi˜ajF “ú–{’nkHŠwƒVƒ“ƒ|ƒWƒEƒ€u‰‰W VolF 5Šª ”NF 1978”N •ÅF 360-368•Å ’˜ŽÒi˜ajF - ƒ^ƒCƒgƒ‹i˜ajF - ´˜^i˜ajF
- ƒL[ƒ[ƒhi˜ajF - ŒfÚŽGŽi‰pjF PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒi‰pjF H.N.SRIVASTAVA ƒ^ƒCƒgƒ‹i‰pjF USE OFKAZAKH NUCLEAR EXPLOSIONS FOR TESTING DILATANCY DIFFUSION MODEL OF EARTHQUAKE PREDICTION ´˜^i‰pjF
P wave travel time anomalies from Kazakh explosions during the years 1965-1972 were studied with reference to Jeffreys Bullen (1952) and Herrin Travel Times Tables (1968) and discussed using 'F' ratio test at seven stations in Himachal Pradesh. For these events, the temporal and spatial variations of travel time residuals were examined from the point of view of long term changes in velocity known to precede earthquakes and local geology. The results show preference for Herrin Travel time tables at these epicentral distances from Kazakh explosions. 'F' ratio test indicated that variation between sample means of different stations in the network showed more variation than can be attributed to the sampling error. Although the spatial variation of mean residuals (1965-1972) could generally be explained on the basis of the local geology, the temporal variations of such residuals from Kazakh explosions offer limited application in the testing of dilatancy model of earthquake prediction. ƒL[ƒ[ƒhi‰pjF - ‹LŽ–‹æ•ªF - ‹æ•ª @@@ˆÏˆõ‰ï˜_•¶W