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

 
 

Component	Mass (kg)	Tp	Vo	Damp.	From	To	Source
Z	1300	4.5	200	2.1	1927 04 01	-
Z	1300	4.5	190	2.0	1927 10 08	-
Z	1300	4.5	190	2.0	1928 01 01	-
Z	1300	4.1	165	2.0	1929 01 13	-
Z	1300	4.6	190	4.3	1929 03 15	-
Z	1300	4.5	165	3.8	1929 07 05	-
Z	1300	4.0	175	4.0	1929 10 05	-
Z	1300	4.1	165	3.0	1930 01 01	1930 03 31
Z	1300	4.0	165	3.0	1930 04 01	1930 06 30
Z	1300	4.0	150	3.0	1930 07 01	1930 09 30
Z	1300	3.9	145	3.3	1930 10 01	1930 12 31
Z	1300	3.7	160	3.9	1934 01 01	1934 03 31
Z	1300	3.6	160	4.4	1934 04 01	1934 06 30
Z	1300	3.2	170	3.9	1934 07 01	1934 09 30
Z	1300	3.1	170	4.1	1934 10 01	1934 12 31
Z	1300	3.3	155	4.0	1935 01 01	1935 03 31
Z	1300	3.3	170	4.2	1935 04 01	1935 06 30
Z	1300	3.2	170	4.3	1935 07 01	1935 09 30
Z	1300	3.2	165	4.3	1935 10 01	1935 12 31
Z	1300	3.2	150	4.1	1937 01 01	1937 03 31
Z	1300	3.4	150	4.1	1937 04 01	1937 06 30
Z	1300	3.1	150	4.9	1937 07 01	1937 09 30
Z	1300	3.1	150	2.0	1937 10 01	1937 12 31
Z	1300	3.0	150	2.0	1938 01 01	1938 03 31
Z	1300	3.1	180	2.2	1938 04 01	1938 06 30
Z	1300	3.2	215	2.6	1938 07 01	1938 09 30
Z	1300	3.2	215	2.8	1938 10 01	1938 12 31
Z	1300	3.1	190	2.6	1939 01 01	1939 03 31
Z	1300	3.2	210	2.9	1939 03 31	1939 06 30
Z	1300	3.0	200	2.8	1939 07 01	1939 09 30
Z	1300	3.0	200	2.7	1939 10 01	1939 12 31
Z	1300	2.7	250	2.0	1948 01 01	1948 03 31
Z	1300	2.7	250	2.0	1948 01 01	1948 03 31
Z	1300	2.6	250	2.8	1948 03 31	1948 06 30
Z	1300	2.6	250	2.8	1948 03 31	1948 06 30
Z	1300	2.6	240	2.4	1948 07 01	1948 09 30
Z	1300	2.6	240	2.4	1948 07 01	1948 09 30
Z	1300	2.6	240	2.4	1948 10 01	1948 12 31
Z	1300	2.6	240	2.4	1948 10 01	1948 12 31
Z	1300	2.7	230	2.8	1949 01 01	1949 03 31
Z	1300	2.7	230	2.8	1949 01 01	1949 03 31
Z	1300	2.7	240	2.8	1949 03 31	1949 06 30
Z	1300	2.7	240	2.8	1949 03 31	1949 06 30
Z	1300	2.7	240	2.8	1949 07 01	1949 09 30
Z	1300	2.7	240	2.8	1949 07 01	1949 09 30
Z	1300	2.7	240	2.6	1949 10 01	1949 12 31
Z	1300	2.7	240	2.6	1949 10 01	1949 12 31