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| Titel |
Evaluation of seismo-electric anomalies using magnetic data in Taiwan |
| VerfasserIn |
C. H. Chen, H. L. Hsu, S. Wen, T. K. Yeh, F. Y. Chang, C. H. Wang, J. Y. Liu, Y. Y. Sun, K. Hattori, H. Y. Yen, P. Han |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 3 ; Nr. 13, no. 3 (2013-03-07), S.597-604 |
| Datensatznummer |
250018382
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| Publikation (Nr.) |
 copernicus.org/nhess-13-597-2013.pdf |
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| Zusammenfassung |
| The Parkinson vectors derived from 3-component geomagnetic data via the
magnetic transfer function are discussed with respect to epicentre locations
and hypocentre depths of 16 earthquakes (M ≥ 5.5) in Taiwan during a
period of 2002–2005. To find out whether electric conductivity changes would
happen particularly in the seismoactive depth ranges, i.e. in the vicinity of
the earthquake foci, the frequency dependent penetration depth of the
electromagnetic waves (skin effect) is taken into account. The background
distributions involving the general conductivity structure and the coast
effect at 20 particular depths are constructed using the Parkinson vectors
during the entire study period. The background distributions are subtracted
from the time-varying monitor distributions, which are computed using the
Parkinson vectors within the 15-day moving window, to remove responses of the
coast effect and underlying conductivity structure. Anomalous depth sections
are identified by deviating distributions and agree with the hypocentre
depths of 15 thrust and/or strike-slip earthquakes with only one exception of
a normal fault event. |
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