Earthquakes in California 1888
Earthquakes in California 1888
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30s. 10s. A. M Chabot Observatory: the shock was sufficient to waken a sound sleeper (YI). On the duplex seismometer plate the trace begins with a tremu- lous motion toward the W. , followed by two sharp jerks to the S. The motion of the earth is contrary to the motion of the plate.
October 23 ? Lick Observatory : During Mr. Keeler's ab- sence the earthquake instruments were in charge of Mr. Hill. On October 23, at 6 P. M. , I noticed that the earthquake instru- ments were in their usual state.... I also noted at 9 P. M. , October 24, that a shock had occurred previously. The clock dial of the earthquake clock is divided to 12 hours (instead of to 24 hours as it should have been), and there is an ambiguity of 12 hours in the time of the shock, which is either October 23, llh. 42m. P. M. , or October 24, llh. 42m. A. M. The shock was sufficient to start the clock of the 'E wing seismograph, but the plate did not move. The duplex seismometer plate shows a tremulous wave in the direction KB.
What to read after Earthquakes in California 1888?
You can find similar books in the "Read Also" column, or choose other free books by Holden Edward Singleton to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
30s. 10s. A. M Chabot Observatory: the shock was sufficient to waken a sound sleeper (YI). On the duplex seismometer plate the trace begins with a tremu- lous motion toward the W. , followed by two sharp jerks to the S. The motion of the earth is contrary to the motion of the plate.
October 23 ? Lick Observatory : During Mr. Keeler's ab- sence the earthquake instruments were in charge of Mr. Hill. On October 23, at 6 P. M. , I noticed that the earthquake instru- ments were in their usual state.... I also noted at 9 P. M. , October 24, that a shock had occurred previously. The clock dial of the earthquake clock is divided to 12 hours (instead of to 24 hours as it should have been), and there is an ambiguity of 12 hours in the time of the shock, which is either October 23, llh. 42m. P. M. , or October 24, llh. 42m. A. M. The shock was sufficient to start the clock of the 'E wing seismograph, but the plate did not move. The duplex seismometer plate shows a tremulous wave in the direction KB.
What to read after Earthquakes in California 1888?
You can find similar books in the "Read Also" column, or choose other free books by Holden Edward Singleton to read onlineMoreLess
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