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

 
 

Component	Mass (kg)	Tp	Vo	Damp.	From	To	Source
E-W	1000	11.8	510	5.1	1936 06 01	1936 06 30
E-W	1000	12.0	515	5.1	1936 07 01	1936 07 31
E-W	1000	13.5	560	5.0	1936 08 01	1936 08 31
E-W	1000	11.5	575	5.0	1936 10 01	1936 10 31
E-W	1000	11.4	653	4.7	1937 07 01	1937 07 31
E-W	1000	11.5	700	5	1937 09 01	1937 09 30	*
E-W	1000	11.5	550	5	1937 12 01	1937 12 31	*
E-W	1000	13	502	5.8	1938 08 01	1938 08 31
E-W	1000	12.2	591	5.4	1938 09 01	1938 09 30
E-W	1000	12	514	5.1	1938 10 01	1938 10 31
E-W	1000	12	561	4.6	1938 11 01	1938 11 30
E-W	1000	11.5	572	5.5	1938 12 01	1938 12 31
E-W	1000	13	502	5.8	1939 08 01	1939 08 31
E-W	1000	12.2	591	5.4	1939 09 01	1939 09 30
E-W	1000	12.2	490	4.4	1939 10 01	1939 10 31
E-W	1000	11.9	511	4.7	1939 10 01	1939 10 31
N-S	1000	12.3	616	5.1	1940 01 01	1940 03 31