CO-SEISMIC RESPONSE OF T-1 ABSOLUTE GRAVIMETER
1）Department of Precision Instruments，Tsinghua University，Beijing 100084
Abstract The measurement results of T-1 absolute gravimeter showed abnormal values after the Japan Ms9.0 earthquake occurred in March 11th 2011. The deviation caused by the powerful aftershocks of the earthquake reached at as large as 656×10-8 ms-2. The disturbed vibration isolation is the main reason of the abnormal values，according to the analysis for dropping chamber，interferometer and vibration isolation.
Key words ：
absolute gravimeter
co-seismic response
Japan Ms9.0 earthquake
vibration isolation system
error
Received: 23 August 2013
Published: 23 January 2014
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