Tele-seismic coseismic well temperature changes and their interpretation

Coseismic water level oscillation and correlated deep water temperature changes have been observed in a water well at Tangshan City by high sensitivity measurement. Amount of water temperature changes depend on amplitude of water level oscillation. Coseismic water temperatures always decrease as wat...

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Bibliographic Details
Published in:Acta seismologica sinica 2007-05, Vol.20 (3), p.280-289
Main Author: 石耀霖 曹建玲 马丽 尹宝军
Format: Article
Language:English
Subjects:
Deep water
Water content
Water levels
Water temperature
Water wells
井水温度
地震效应
物理解释
等震波圈
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Summary:Coseismic water level oscillation and correlated deep water temperature changes have been observed in a water well at Tangshan City by high sensitivity measurement. Amount of water temperature changes depend on amplitude of water level oscillation. Coseismic water temperatures always decrease as water level oscillates, drop of temperature ranges from 0.001℃ to 0.01℃ corresponding to amplitude of water level oscillation from several centimeters to about one meter. Temperatures usually recover one to several hours after the oscillation. We suggest that the temperature drop is produced by dispersive transfer of heat as the water oscillates, and follow-up thermal conduction makes temperature recovery. Our finite element calculations support quantitatively the idea. High accuracy measurements of water temperature at different depths in the future may test our interpretation.
ISSN:1000-9116
1674-4519
1993-1344
1867-8777
DOI:10.1007/s11589-007-0280-z