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| Titel |
Automated Determination of P-Wave Arrival Times Using Higher Order Statistics |
| VerfasserIn |
L. Kueperkoch, T. Meier, W. Friederich |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250026098
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| Zusammenfassung |
| Due to the continuously increasing amount of digital, seismological data, automatic
localication of seismic events becomes more and more important. The main difficulty is the
automatic identification and precise determination of P- and S-wave arrival times. Here we
present an algorithm based on higher order statistics for the automated determination of
P-onsets of local and regional seismic events. Using the 4th central moment, a characteristic
function is calculated, on which the ”picker” is applied. Important is the automatic
estimation of the quality of the P-onset. In order to get rid off false P-readings, several
algorithms are applied to single station as well as to the finishing multy station
processing.
The robustness and reliability of the automatic has been tested on a very heterogeneous data
set of the temporary, regional seismological network EGELADOS, using manual P-readings,
which serve as reference picks, as well as by a comparison with the Allen- and the Baer- &
Kradolfer-picker. The accuracy and the speed of the presented automatic makes this
processing scheme to an option for the implementation into a near-real time processing, e.g.
for earthquake early-warning systems. |
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