Characteristics of the Wiechert horizontal astatic seismograph weighing 1000 kg at Toledo

 
 

Component	Mass (kg)	Tp	Vo	Damp.	From	To	Source
N-S	1000	13	705	5.0	1936 06 01	1936 06 30
N-S	1000	12.5	714	5.2	1936 07 01	1936 07 31
N-S	1000	12.1	695	5.1	1936 08 01	1936 08 31
N-S	1000	12.1	525	5.2	1936 10 01	1936 10 31
N-S	1000	4.2	600	4	1937 07 01	1937 07 31
N-S	1000	4	620	4.8	1937 09 01	1937 09 30	*
N-S	1000	4.5	650	4.5	1937 12 01	1937 12 31	*
N-S	1000	12.8	591	5	1938 08 01	1938 08 31
N-S	1000	12.3	589	5	1938 09 01	1938 09 30
N-S	1000	12.5	589	4.9	1938 10 01	1938 10 31
N-S	1000	11.7	591	5	1938 11 01	1938 11 30
N-S	1000	11.5	625	5	1938 12 01	1938 12 31
N-S	1000	12.8	591	5.0	1939 08 01	1939 08 31
N-S	1000	13.3	589	5	1939 09 01	1939 09 30
N-S	1000	13.3	700	4.3	1939 10 01	1939 10 31
N-S	1000	12.3	616	5.1	1939 10 01	1939 10 31
E-W	1000	11.9	511	4.7	1940 01 01	1940 03 31