Seismological monitoring of the region of the zeya hydroelectric station: Fid-Bau Portal

Seismological monitoring of the region of the zeya hydroelectric station

Dudchenko, L. N.

Conclusions 1. Seismological monitoring of the region of a large hydroelectric station for the purpose of monitoring geodynamic processes should include both seismometric observations and automated measurements by the standard MMI of the dam which can record slowly occurring processes in the crust. 2. At the hydrostation there should be a list of devices whose operation (under ordinary and emergency conditions) acts unfavorably on the dam, buildings, and structures of the hydrostation. Selection and consideration of their operating conditions are necessary. 3. A seismic detector should be installed at the hydrostation, according to the signal of which the special operating programs of the automatic devices should be turned on with arrival of the seismic P wave and the personnel should proceed to taking actions according to instructions. 4. An automatic system of collecting and processing information both from the seismometric instruments and from the sensors of the MMI should be organized and function at the hydrostation for obtaining prompt earthquake predictions on the basis of the associated precursory signs. All devices should operate synchronously in a real-time mode. 5. The combined action of geodynamic and technogenic factors reduces for the Zeya hydrostation the maximum design earthquake from intensity 9 to 8 with a frequency of once in 100 years. This fundamentally changes the assessment of the seismic hazard for the Zeya hydrostation and requires immediate taking of organizational and technical measures for the purpose of preventing the consequences of a large earthquake.