Characteristics of the Wiechert vertical astatic seismograph weighing 1300 kg at Toledo

 
 

Component	Mass (kg)	Tp	Vo	Damp.	From	To	Source
Z	1300	5	200	4.0	1924 07 01	1924 07 31
Z	1300	5	200	4.0	1924 08 01	1924 08 31
Z	1300	5	200	4.0	1924 09 01	1924 09 30
Z	1300	5	200	4.0	1924 09 01	1924 09 30
Z	1300	5	200	4.0	1924 11 01	1924 11 30
Z	1300	5	180	3.5	1924 12 01	1924 12 31
Z	1300	5	180	3.5	1925 01 01	1925 01 31
Z	1300	5	160	3.5	1925 02 01	1925 02 28
Z	1300	5	160	3.5	1925 03 01	1925 03 31
Z	1300	5	180	3.5	1925 04 01	1925 04 30
Z	1300	5	180	3.5	1925 05 01	1925 05 31
Z	1300	5	160	3.5	1925 06 01	1925 06 30
Z	1300	5	200	3.0	1925 09 01	1925 09 30
Z	1300	5	200	3.0	1925 10 01	1925 10 31
Z	1300	5	200	3.0	1925 11 01	1925 11 30
Z	1000	5	120	4.0	1925 12 01	1925 12 31
Z	1200	4	120	3.0	1926 01 01	1926 01 31
Z	1200	44	110	3.0	1926 02 01	1926 02 28
Z	1200	44	120	3.0	1926 03 01	1926 03 31
Z	1200	44	120	3.0	1926 04 01	1926 04 30
Z	1200	44	120	3.0	1926 05 01	1926 05 31
Z	1200	44	120	3.0	1926 06 01	1926 06 30
Z	1200	4.4	120	3.0	1926 07 01	1926 07 31
Z	1200	4.0	110	3.0	1926 08 01	1926 08 31
Z	1200	5.0	110	4.0	1926 09 01	1926 09 30
Z	1200	5.0	115	4.0	1926 10 01	1926 10 31
Z	1200	5.0	115	4.0	1926 11 01	1926 11 30
Z	1200	5.0	115	4.0	1926 12 01	1926 12 31
Z	1200	4.5	650	4.9	1936 06 01	1936 06 30
Z	1200	4.6	660	4.9	1936 07 01	1936 07 31
Z	1200	4.3	650	3.3	1936 08 01	1936 08 31
Z	1200	4.5	765	4.8	1936 10 01	1936 10 31
Z	1200	12.5	641	5	1937 07 01	1937 07 31
Z	1200	13	597	5	1937 09 01	1937 09 30	*
Z	1200	12	600	5	1937 12 01	1937 12 31	*
Z	1200	4	602	5.1	1938 08 01	1938 08 31
Z	1200	3.8	569	4.5	1938 09 01	1938 09 30
Z	1200	4	524	4.5	1938 10 01	1938 10 31
Z	1200	3.9	537	4.6	1938 11 01	1938 11 30
Z	1300	4.7	700	5	1938 12 01	1938 12 31
Z	1300	4	602	5.1	1939 08 01	1939 08 31
Z	1300	3.8	569	4.5	1939 09 01	1939 09 30
Z	1300	3.8	639	4.3	1939 10 01	1939 10 31
Z	1300	3.85	617	4.0	1939 10 01	1939 10 31
Z	1200	3.9	570	4.6	1940 01 01	1940 03 31