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

 
 

Component	Mass (kg)	Tp	Vo	Damp.	From	To	Source
E-W,N-S	1000	11.6,11.2	171,183	4.9,4.9	1905 01 01	1910 12 31
E-W,N-S	1000	9.3,9.1	194,222	3.8,4.1	1927 03 01	1927 05 01
E-W,N-S	1000	9.3,9.1	194,222	3.8,4.1	1927 03 01	1927 05 01
E-W,N-S	1000	9.4,9.1	195,225	3.8,4.1	1927 05 01	1927 06 30
E-W,N-S	1000	9.4,9.2	195,225	4.0,4.5	1927 07 01	1927 09 30
E-W,N-S	1000	9.4,9.2	197,222	4.0,4.5	1927 10 01	1927 12 31
E-W,N-S	1000	9.1,9.2	219,196	3.8,4.0	1928 01 01	1928 03 31
E-W,N-S	1000	9.3,9.2	198,219	3.9,4.1	1928 04 01	1928 06 30
E-W,N-S	1000	9.3,9.2	198,219	3.9,4.1	1928 04 01	1928 06 30
E-W,N-S	1000	9.2,9.1	198,218	3.9,4.0	1928 10 01	1928 12 31
E-W,N-S	1000	9.1,9.0	199,221	3.7,3.9	1929 01 01	1929 03 31
E-W,N-S	1000	9.1,9.0	199,221	3.8,3.9	1929 04 01	1929 04 11
E-W,N-S	1000	9.1,9.1	199,221	3.8,3.9	1929 04 01	1929 04 16
E-W,N-S	1000	12.7,13	204,239	11.3,8.8	1929 07 10	1929 07 24
E-W,N-S	1000	13.2,13.2	207,230	8.7,9.3	1929 07 24	1929 07 30
E-W,N-S	1000	9.6,9.8	195,225	4.4,4.6	1929 10 01	1929 12 31
E-W,N-S	1000	9.6,9.6	195,225	4.4,4.3	1930 01 01	1930 03 31
E-W,N-S	1000	9.5,9.7	195,223	4.5,4.4	1930 01 01	1930 03 31
E-W,N-S	1000	9.6,9.7	194,223	4.6,4.6	1930 07 01	1930 09 30
E-W,N-S	1000	9.6,9.7	194,223	4.6,4.6	1930 10 01	1930 12 31
E-W,N-S	1000	9.4,9.6	194,223	4.2,4.4	1931 01 01	1931 01 12
E-W,N-S	1000	9.4,9.6	194,220	4.2,4.5	1931 01 04	1931 06 30
E-W,N-S	1000	9.4,9.6	194,220	4.2,4.5	1931 01 12	1931 03 31
E-W,N-S	1000	9.4,9.2	210,175	4.2,3.8	1933 06 01	1933 12 31
E-W,N-S	1000	9.8,9.8	195,215	4.5,4.5	1934 07 01	1934 09 30