Open AccessThe Systematic Error in Seismic Location
Author(s) -
Underwood Robert,
Lilwall Roy C.
Publication year - 1969
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.1969.tb00255.x
Subject(s) - geology , seismology , geodesy , systematic error , set (abstract data type) , event (particle physics) , least squares function approximation , component (thermodynamics) , mathematics , computer science , statistics , physics , quantum mechanics , estimator , thermodynamics , programming language
Summary The mislocation of a seismic event can be represented by a 4‐component vector, the major part of which is ‘network bias’, which depends on the time terms and the geometry of the observing network. An excellent approximation, the ‘network vector’, can be derived from the least squares solution, by entering a set of station corrections into the equations of condition. For Pacific events, the epicentral components of bias seem to be north and west, and although these are well corrected by published time terms, depth and origin time biases are not.