Abstract
THE recent earthquake, reported as felt in Constantinople, and as very destructive near the Sea of Marmora, has left its mark on the photographic traces of our unifilar and bifilar magnetographs, but not on the vertical force balance; and, contrary to expectation, the disturbance is more pronounced on the unifilar than on the bifilar curve. The Milne seismograph failed to record the time of the maximum disturbance otherwise than that it occurred either between 1.44 and 1.45 or between 1.47 and 1.50 a.m. on August 9, during which intervals the oscillations of the boom overstepped the recording limits. The time as registered on the magnetograms is 1.45 a.m., and this, as the true time of greatest earth oscillation, would lead us to expect an origin nearer to us than the Sea of Marmora.
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