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| Titel |
Disturbances in groundwater chemical parameters related to seismic and volcanic activity in Kamchatka (Russia) |
| VerfasserIn |
P. F. Biagi, L. Castellana, R. Piccolo, A. Minafra, G. Maggipinto, A. Ermini, V. Capozzi, G. Perna, Y. M. Khatkevic, E. I. Gordeev |
| 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 ; 4, no. 4 ; Nr. 4, no. 4 (2004-09-27), S.535-539 |
| Datensatznummer |
250001818
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| Publikation (Nr.) |
 copernicus.org/nhess-4-535-2004.pdf |
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| Zusammenfassung |
| Starting from 1992 geochemical data are being collected with a mean sampling
frequency of three days in the form of the pH value and of the most common
ions and gases in the groundwater in one deep well located in Petropavlovsk,
the capital city of Kamchatka (Russia). On 1 January 1996 a strong eruption
started from the Karymsky volcano, that is located about 100km far from the
well, in the north-northeastern direction. At the same time, a large
earthquake (M=6.9) occurred in the Karymsky area. On 5 December 1997 a
very large earthquake (M=7.7) occurred offshore, at a distance of 350km
from the well and towards the same direction. The analysis of the
geochemical data shows clear variations in the raw temporal trends on both
cases. For the first event, a clear premonitory phase appeared; for the
second one, some pre-seismic variations could be revealed but permanent
modifications of the chemistry of the water subsequent to the earthquake are
very clear. In both cases the feature of the geochemical variations is
consistent with an afflux of new water in the aquifer connected with the
well and with an escape of the Carbon dioxide gas from the ground in
different directions. A schematic model able to justify such a phenomenology
and the connections of the geochemical variations with the previous tectonic
activities is proposed. |
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