SEISMOGRAPH RECORDS.

Auckland Star, Volume XXXVII, Issue 96, 23 April 1906, Page 5

SEISMOGRAPH RECORDS.

ANOTHER EARTHQUAKE ON THURSDAY. RECORDED IN MELBOURNE. (Received 9.45 a.m.) MELBOURNE, this day. The Seismograph at the Observatory shows the first indication of tremor at 11.30 on the night of the eighteenth. The tremor gradually increased until it reached its period of greatest intensity at 12.41 on the morning of the nineteenth. Thence it gradually lessened until at 2.30 the same morning the lino resumed its normal position. Comparing times, the Government Astronomer, Mr. Baracchi, computes that the tremor took 80 minutes to travel from San Francisco to Melbourne, which is at the rate of two miles a second, which is not an unusual pace, cases being recorded where the speed has been seven miles. The Seismograph showed altogether ten impulses, the ninth being the most strongly marked one.

A most striking discovery has been made in the record of another earthquoke on April 19, the marks indicating that it originated a considerable distance from Melbourne. Mr. Baracchi is greatly surprised that no reports of this disturbance Have'yet reached ilelbonrne. He does not regard seriously statements made by various persons who believe that they felt the San Francisco shock in Melbourne, the tremor in Melbourne having been so slight as to have been unapprcciable.