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| Titel |
Quasi-synchronous multi-parameter anomalies associated with the 2010–2011 New Zealand earthquake sequence |
| VerfasserIn |
K. Qin, L. X. Wu, A. Santis, J. Meng, W. Y. Ma, G. Cianchini |
| 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 ; 12, no. 4 ; Nr. 12, no. 4 (2012-04-16), S.1059-1072 |
| Datensatznummer |
250010702
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| Publikation (Nr.) |
 copernicus.org/nhess-12-1059-2012.pdf |
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| Zusammenfassung |
| Positive thermal anomalies about one month before the 3 September 2010
Mw = 7.1 New Zealand earthquake and "coincidental" quasi-synchronous
fluctuations of GPS displacement were reported. Whether there were similar
phenomena associated with the aftershocks? To answer it, the following
was investigated: multiple parameters including surface and near-surface air
temperature, surface latent heat flux, GPS displacement and soil moisture,
using a long-term statistical analysis method. We found that local thermal
and deformation anomalies appeared quasi-synchronously in three particular
tectonic zones, not only about one month before the mainshock, but also tens
of days before the 21 February 2011 Mw = 6.3 aftershock, and that the time
series of soil moisture on the epicenter pixel had obvious peaks on most of
the anomalous days. Based on local tectonic geology, hydrology and
meteorology, the particular lithosphere-coversphere-atmosphere coupling mode
is interpreted and four mechanisms (magmatic-hydrothermal fluids upwelling,
soil moisture increasing, underground pore gases leaking, and positive holes
activating and recombining) are discussed. |
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