﻿81 



At 1.45 a shock was felt in Algiers. There were two heavy shocks in Blidah, near Algiers, anil also 

 about this time there were two in the Canaries. The time records indicate that the origin was about 12" 

 distant from Christchurch, and after the shock reached this station it had yet 10° to travel before arriving 

 at the " Discovery." The probability, then, is that it lies appro.vimately in 1G0° E. Long, and 52° S. Lat. 

 The time at the origin would be about 0.14. Large waves or Pg would reach Western Europe at 1.44 to 

 1.45, indicating that the C and M records for European stations both refer to this particular phase. That 

 shocks should have been felt in Northern Africa at the time when these waves ani\'ed is worthy (jf note 

 as also is the absence of records at stations lying between the origin and Europe. 



We have here a case not only of antipodean convergence, but possibly also of wave convergence 

 resulting in the relief of seismic strain. 



The area over which it was recorded extends as a Ijand from New Zealand in a N.W. direction over 

 Western Asia and Europe, which band might possilily be continued round the world. 



118. September's. 



Origin like No. 117. 



119. Scptemhcr 2Q. 



The value M-C at the first two stations indicates an origin about 14" distant from each. The two 

 values for M and the great diflerence between the two amplitudes, however, indicate that the origin was 

 nearer to the "Discovery" than to Christchurch. A possible and extremely likely origin lies on the 

 continuation of the New Zealand axis or in Long. 145° E. and 52° S. Lat. With a time of origin at 5.50 

 we should expect Po to reach Taschkent at 6.24, and P3 at 7.2. The record at that place may therefore 

 refer to a local shock, and is not connected with the " Discovery " observations. 



120. Octobe7- 4. 



The origin was apparently about 14° distant from Christchurch and nearer to that station than to any 

 other. The time of origin would be about 4.57, and if the position of this origin is on the S.W. 

 continuation of the New Zealand axis we should expect the time of arrival of phase Pg at British stations 

 to be about 6.27, which, when we consider the durations given for these stations, might well be the case. 



M 



