 |
| Titel |
Application of k-means and Gaussian mixture model for classification of seismic activities in Istanbul |
| VerfasserIn |
H. S. Kuyuk, E. Yildirim, E. Dogan, G. Horasan |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1023-5809
|
| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 19, no. 4 ; Nr. 19, no. 4 (2012-08-03), S.411-419 |
| Datensatznummer |
250014229
|
| Publikation (Nr.) |
 copernicus.org/npg-19-411-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| Two unsupervised pattern recognition algorithms, k-means, and Gaussian mixture model (GMM)
analyses have been applied to classify seismic events in the vicinity of Istanbul.
Earthquakes, which are occurring at different seismicity rates and extensions of the Thrace-Eskisehir Fault
Zone and the North Anatolian Fault (NAF), Turkey, are being contaminated by quarries operated
around Istanbul. We have used two time variant parameters, complexity, the ratio of integrated
powers of the velocity seismogram, and S/P amplitude ratio as classifiers by using waveforms of
179 events (1.8 < M < 3.0). We have compared two algorithms with classical multivariate linear/quadratic
discriminant analyses. The total accuracies of the models for GMM, k-means, linear discriminant function
(LDF), and quadratic discriminant function (QDF) are 96.1%, 95.0%, 96.1%, 96.6%, respectively.
The performances of models are discussed for earthquakes and quarry blasts separately.
All methods clustered the seismic events acceptably where QDF slightly gave better improvements
compared to others. We have found that unsupervised clustering algorithms, for which no a-prior target
information is available, display a similar discriminatory power as supervised methods of discriminant analysis. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|