Vol. 52.] SEISMIC PHENOMENA IN THE BRITISH EMPIRE. 661 



2. Auckland. 



£ 2 = 130 kilom. (1869-1888). 

 (13 localities and 90 shocks.) 



This region, comprising the volcanic districts of Tongariro, Lake 

 Taupo, and Rotorua, is bounded on the south by the preceding 

 region, and on the north by the isthmus of Auckland. Its feeble 

 seismicity in comparison with that of Cook Strait is a notable example 

 of the independence of seismic and volcanic phenomena 

 one from the other. 



3. Canterbury . 



£ 2 =137 kilom. (1868-1888). 

 (10 localities and 68 shocks.) 



This region is bounded on the north by the Cook Strait area, 

 on the west by the longitudinal mountainous ridge which forms the 

 backbone of Middle Island between Mounts Franklin and Stokes, 

 and on the south by the northern slope of the Molyneux river-basin. 

 The considerable upheaval of the coast-line, which has been claimed 

 as an effect of the great earthquake of 1869, can hardly be 

 admitted unless better proofs are forthcoming than those hitherto 

 advanced. 



4. Otago and Steivart Island. 



£ 2 =138 kilom. (1871-1888). 

 (5 localities and 47 shocks.) 



This region comprises the Molyneux river-basin and Stewart 

 Island. It is bounded by the preceding region and by the range 

 running from Mount Stokes to Tewaewae Bay. As it has much the 

 same seismicity as the preceding region, it might well have formed 

 with it one single area — the eastern slope of the Middle Island. 



5. Western coast of the Middle Island. 



£ 2 =143 kilom. (1870-1888). 

 (5 localities and 21 shocks.) 



The seismicity of this region is not very well known. 



New Zealand : £ 2 = 103 kilom. 



6. Tasmania. (Fig. 4, p. 662.) 



£ t =390 kilom. (1859-1884). # 2 * = 192 kilom. 

 (6 localities and 10 shocks.) 

 These values for the seismicity are very uncertain. 



7. Australia. (Fig. 4, p. 662.) 



(24 localities and 71 shocks.) 



For want of sufficient data it has been found impossible to calculate 

 the seismicity of this island-continent. There is reason to suspect 

 the existence of an unstable region along Bass's Strait, and that of 

 another in the upper basin of the Murrumbidgee. 



