A wide range seismogram digitizer
1967 ◽
Vol 57
(1)
◽
pp. 91-98
◽
Keyword(s):
abstract A visual seismogram drum-digitizer has been developed with precision adequate for the seismograms generated in standard networks. The variable speed, sampling interval and optical magnification permit convenient and efficient digital conversion of a wide range of record traces for different seismological research purposes. An analysis of the precision has been made: over a dynamic range of 150 mm errors are less than 50 μ, and time intervals accurate to ±.05 sec for short-period seismograms or ±0.2 sec for long-period records.
1949 ◽
Vol 199
(1058)
◽
pp. 311-327
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Keyword(s):
2021 ◽
Vol 508
(1)
◽
pp. 789-802
Keyword(s):
2021 ◽
Vol 944
(1)
◽
pp. 012005
Keyword(s):
Keyword(s):
1987 ◽
Vol 121
◽
pp. 287-293
Keyword(s):
Keyword(s):