The Response of Water Level in Well YUZ-5, Kamchatka to the Magnitude 9.3,Sumatra-Andaman Earthquake of December 26, 2004
Forced and free oscillations of water level were recorded in well YuZ-5, Kamchatka due to the passage of seismic waves from the Sumatra-Andaman earthquake of December 26, 2004, Mw = 9.3, hypocentral distance 8250 km. The greatest amplitude of water level oscillations, at least 5 cm, was observed dur...
| Published in: | Journal of Volcanology and Seismology |
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| Main Authors: | , |
| Format: | Text |
| Language: | Russian English |
| Published: |
Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд) (Род-Таун)
2007
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| Subjects: | |
| Online Access: | http://repo.kscnet.ru/2741/ http://repo.kscnet.ru/2741/7/ViS_Sumatra_angl.pdf |
| Summary: | Forced and free oscillations of water level were recorded in well YuZ-5, Kamchatka due to the passage of seismic waves from the Sumatra-Andaman earthquake of December 26, 2004, Mw = 9.3, hypocentral distance 8250 km. The greatest amplitude of water level oscillations, at least 5 cm, was observed during the onset of seismic surface waves with a typical period of 20–50 s. The total duration of the forced and free water-level oscillations was about ten hours. The available theoretical models that describe oscillations were used to estimate the transmissivity of the groundwater reservoir. A hypothesis was proposed to explain a temporary increase in reservoir transmissivity during the passage of seismic waves by invoking defective structure of the crack-pore space and a sharp increase in host rock permeability. |
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