AND ERUPTIVE FORCEt!. 57 



doubt that this great elevation has been eiiected by 

 successive small uprisings, such as that which ac- 

 companied or caused the earthquake of this year, 

 and likewise by an insensibly slow rise, which is 

 certainly in progress on some parts of this coast. 



The island of Juan Fernandez, 360 miles to the 

 N.E., was, at the time of the great shock of the 

 20th, violently shaken, so that the trees beat against 

 each other, and a volcano burst forth under water 

 close to the shore : these facts are remarkable, be- 

 cause this island, during the earthquake of 1751, 

 was then also aftected more violently than other 

 places at an equal distance from Concepcion, and 

 this seems to show some subterranean connection 

 between these two points. Chiloe, about 340 miles 

 southward of Concepcion, appears to have been 

 shaken more strongly than the intermediate district 

 of Valdivia, where the volcano of Villarica was 

 noways affected, -whilst in the Cordillera in front 

 of Chiloe, two of the volcanoes burst forth at the 

 same instant in violent action. These two volca- 

 noes, and some neighboui'ing ones, continued for a 

 long time in eruption, and ten months afterwards 

 were again influenced by an earthquake at Concep- 

 cion. Some men, cutting wood near the base of 

 one of these volcanoes, did not perceive the shock 

 of the 20th, although the whole surrounding prov- 

 ince was then trembling ; here we have an erup- 

 tion, relieving and taking the place of an earth- 

 quake, as would have happened at Concepcion, 

 according to the belief of the lower orders, if the 

 volcano of Antuco had not been closed by witch- 

 craft. Two years and three quarters afterwards, 

 Valdivia and Chiloe were again shaken, more vio- 

 lently than on the 20th, and an island in the Chonos 

 Archipelago was permanently elevated more than 

 eight feet. It will give a better idea of the scale 



