Open AccessThe relocation of epicentres in Iran
Author(s) -
Ambraseys N. N.
Publication year - 1978
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1978.tb04256.x
Subject(s) - relocation , epicenter , azimuth , geology , geodesy , seismology , computer science , mathematics , geometry , programming language
Summary. It is demonstrated that routine computer relocations of early epicentres in Iran seldom result in new positions which are much more reliable than the original ISS locations. This is because the early arrival data are generally of such poor accuracy and azimuthal distribution that the epicentre can be resolved only to the average limits given by the input data; the resolution of focal depth is even worse. It appears that the only reliable method for improving or confirming early instrumental epicentres in areas such as Iran is to attempt to find correlations with macroseismic data.