 |
| Titel |
Nonlinear analysis of magnitude and interevent time interval sequences for earthquakes of the Caucasian region |
| VerfasserIn |
T. Matcharashvili, T. Chelidze, Z. Javakhishvili |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1023-5809
|
| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 7, no. 1/2 ; Nr. 7, no. 1/2, S.9-20 |
| Datensatznummer |
250004239
|
| Publikation (Nr.) |
 copernicus.org/npg-7-9-2000.pdf |
|
|
|
|
|
| Zusammenfassung |
| It is well known that lithospheric seismic
processes are characterized by self-similarity or scale invariance in terms of
earthquake-size, time, space and space-time distributions, although precise
details of underlying dynamics are not clear. In this study we apply nonlinear
dynamics theory tools, such as a correlation dimension, "surrogate"
data analysis and positive Lyapunov exponent calculation, to investigate
dynamical characteristics of seismicity in the Caucasian region. Interevent time
intervals and magnitude sequences are considered for different area and
magnitude windows. We find significant evidence of a low dimensional nonlinear
structure of earthquake time distribution, obtained by consideration of time
interval sequences between all events encountered, above some threshold
magnitude, in the original catalogue. However nonlinear structure is absent in
artificially generated sequences of time intervals between independent events as
well as time intervals between aftershocks. It seems that this kind of
filtration of the original catalogue destroys the existing temporal structure of
considered lithospheric processes. Unlike artificial inter-aftershock time
interval sequences, obtained by removing independent events from the original
series, the time interval sequence between the Racha earthquake aftershocks
reveals clear evidence of nonlinear structure. Earthquake magnitude dynamics.
for all considered regions and magnitude windows, reveal high dimensional
nonlinearity. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|