ANALYSIS ON SOLID TIDE DISTORTION OF BOREHOLE STRAIN IN KORLA STATION
Shang-Wei Li · Inland Earthquake · 2011
In this paper,the reliability analysis of volume strain observational data for three years in korla station show the observation accuracy achieve I station's accuracy.The main disturbance is air pressure effect and water level interference.The observational data can record the clear solid tide.We distinguished 48 distortion of solid tide by low pass filtering and first difference.The statistical result shows 6 distortion was interference,13 distortion appeared before near earthquakes,and the others appeared before strong distant earthquakes.The distortion of solid tide in observational data was abnormal signal before earthquake,but it can not be distinguished that the abnormal signal was before near earthquakes or before strong distant earthquakes.