4 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [NoV. 1 7, 



Graciosa ; 2° 20' West of the Point of Observation at St. Micliael's. 

 Reported by Mr. Vice-Cousul Jones. 



Point of Observation. — The chief town, Santa Cruz, situated on 

 the sea at the north side, from which the island gradually rises for 

 nearly two miles to the base of a peak 1226 feet high, forming part 

 of a ridge which divides the island into two parts, one more moun- 

 tainous than the other. 



Time and Phenomena. — The earthquake was A^ery sensibly felt in 

 the southern parts, but in the northern was so slight as to escape the 

 observation of Mr. Jones and many others. It was remarked "just 

 before the clock struck ten" by a sick man under Mr. Jones's care, 

 as lasting about two seconds. There was no noise or repetition of the 

 disturbance, and no damage has been complained of. The movement 

 is said to have begun towards the north-west quarter. 



Fayal ; 2° .57' West of the Point of Observation at St. Michael's. 

 Reported by INIr. Vice-Cousul Minchin. 



Point of Observation. — The chief town Horta, situated close to 

 the sea on the east side of the island, from which there is a rise in a 

 distance of about four miles to the base of a peak forming its crest, 

 3351 feet high. 



Time and Phenomena. — The earthquake was felt while Mr. Min- 

 chin's clock Avas striking ten (10*^ 12"" at St. Michael's), lasting nearly 

 three seconds, as observed by a clock a short distance from where 

 Mr. Minchin was sitting. It was not accompanied by any noise ; the 

 direction of oscillation was not perceptible ; it caused no damage, and 

 was not felt on board the ships in the roads. 



Summary of the foregoing particulars. 



Place. 



St. Michael's 

 time. 



Duration 



of dis- 

 turbance. 



Damage done. 



Direction of vibra- 

 tion. 



Subterra- 

 neous noise, 



Effect 

 atea. 



St. Man''s ... 

 St. Michael's . 



Terceira 



Graciosa 



Fayal 



Flores 



P.M. 



lO^ 8" 



10 3 



10 1 

 10 + ? 

 10 12 



not 



seconds. 



3 



6 or 7 



6 to 10 

 2.' 

 3 



felt .' 



considerable, 



greatest at the 



west end 



slight, 

 none, 

 none. 



s. to N. 



•N.N.W. to S.S.E. 



N. to S. 

 S.E. to N.W. 



slight, 

 distinct. 



none, 

 none, 

 none. 



strong 

 on the 

 west 

 side. 



slight. 



Remarks. — In the foregoing particulars there is a general agreement 

 that the Adbrations of this earthquake were northerly and southerly. 

 I feel great confidence in my own persuasion, formed at the moment, 

 that the true direction where I was sitting was as I have stated it. 



The time has been ascertained for St. Michael's, Terceira, and 

 Fayal, but it is not known if the clocks were right. Supposing them 



