662 



M. P. DE MONTESSUS DE BALLOKE ON |~N0V. 1 896, 



Fig. 4. 



AUSTRALIA 



AND 



TASMANIA. 



Seis mical Locali ties. 



The numbers after place- 

 names are those of the 

 recorded shochs- 



Marlborough* 



Macquariee 



Sydney 5 



I Kilometrica I Se ism icity 

 of Tasmania 216 Kin. 



§ 4. Africa. (PI. XXXII.) 



The vast extent of the British possessions in Africa accounts for 

 the inclusion of a seismic description of this continent (with the 

 exception of the Barbary coast) in the present memoir. Taken as 

 a whole, data are wanting, and only for a few localities do we 

 possess some information — and that more or less vague — as to the 

 intensity and frequency of earthquakes. The groups of islands 

 situated in the Atlantic are not dealt with here. 



195 shocks have been recorded from 64 localities. 



Historians mention a certain number of earthquakes in Egypt, 

 but these are merely vibrations propagated from Syria. 



According to d'Abbadie, shocks are of common occurrence at 

 Massowah, and at Imakulla in Samhar. Dr. Blanc, however, 

 records only two shocks at Massowah between February 1st and 

 September 30th, 1864. Kaufmann avers that earthquakes are 

 frequent and severe at Gondokoro, and that they very probably 

 originate from Mount Logwack or Logwat, south of that town. 

 On Th. Kotschy's map this is called the Erdbebenberg, or Earthquake 

 Hill, a highly suggestive name. The preceding information is con- 

 firmed by the missionary Father Dovyak. 



Earthquakes are sufficiently frequent and severe on the Guinea 

 coast between Accra and St. George d'Elmira, but are of rare 

 occurrence on the Senegal coast. 



A centre of vibration appears to exist not far from Bu Suada, on 

 the borders of the Sahara. 



