Biagi, P.F. and Bella, F. and Scandone, R. and Cozzi, E. and Ermini, A. and Kingsley, S.P. and Anderson, C.W. and Derlien, P.J. and Khatkevich, Y.M. and Gordeev, E.I. (1999) Groundwater Argon content on the occasion of strong earthquakes in a seismogenetic area of Kamchatka (Russia). Il nuovo cimento C, 22 C (3-4). pp. 503-508. ISSN 1826-9885
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Abstract
Since 1988 the argon content in underground water has been measured at the Morosnaya well, in the Kamchatka peninsula, with a sampling frequency of three days. In the same well other gases and ions dissolved in water are measured, together with flow rate, pH and temperature. The most active seismogenetic area in Kamchatka is that located offshore, along the south-eastern coast of the peninsula. The strongest earthquakes in this area occurred on March 2, 1992 (M47.1), November 13, 1993 (M47.0) and June 21, 1996 (M47.1), within a distance of 200 km from the well. The focal depth of the earthquakes of 1992 and 1993 was 20 and 40 km, respectively. The earthquake which occurred in 1996 was very shallow; a focal depth of few kilometres was estimated. No anomalies in the argon or other dissolved gas concentration were observed on the occasion of 1992 and 1993 earthquakes; on the other hand, a very clear preseismic anomaly appeared in the concentration of argon and nitrogen on the occasion of the 1996 earthquake. The behaviour of the ion content was opposite; no anomaly on the occasion of the last earthquake and clear preseismic anomalies on the occasion of the two former earthquakes appeared. A possible explanation of the quoted behaviour of dissolved gases and ions in groundwater according to the different focal depth of the subsequent earthquakes is presented.
| Item Type: | Article |
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| Additional Information: | Paper presented at the “Fourth International Conference on Rare Gas Geochemistry”, Rome, October 8-10, 1997. |
| Uncontrolled Keywords: | Phenomena related to earthquake prediction; groundwater; seismic sources (mechanisms, magnitude, moment frequency spectrum); conference proceedings |
| Subjects: | 500 Scienze naturali e Matematica > 550 Scienze della Terra |
| Depositing User: | Marina Spanti |
| Date Deposited: | 11 Oct 2019 12:51 |
| Last Modified: | 11 Oct 2019 12:51 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/13457 |
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