 |
| Titel |
Extending the Double Difference location technique - improving depth resolution |
| VerfasserIn |
Ł. Rudziński, W. Dębski |
| Konferenz |
EGU General Assembly 2012
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250063238
|
|
|
|
|
|
| Zusammenfassung |
| An increase of a seismic hypocenter location accuracy is a subject of many analysis and is
also the central issue of this presentation. The limited location accuracy follows not only
from limited data quality as it is a case of any direct measurement but actually is a
result of uncertainties introduced by inversion procedure used for processing of
observational data. For example, data availability, a sensor network geometry, knowledge of
the seismic velocity spatial distribution are factors of this sort. In case of mining
applications, the planarity of seismic network operated usually at the exploitation
level becomes also an important issue limiting estimation accuracy for hypocenter
depths.
In this paper we consider a newly proposed Extended Double Difference (EDD) location
technique which has been designed to avoid some limitations of the classical double
difference (DD) technique. We demonstrate the proposed algorithm much more efficiently
uses information on a network and seismic sources non-planarity than the DD algorithm. In
consequence the EDD algorithm significantly improves the depth estimations in situations
when network and sources are almost planar –which is typical situation for deep
mines.
The presented theoretical analysis carried out in the framework of the probabilistic
inverse theory is illustrated by a case study from the Rudna copper mine (Poland). |
|
|
|
|
|
|