ON SEISMOLOGICAL INVESTIGATIONS. 



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1789 Severe earthquakes all over the south-west country, principally in Arnessysla. 



They commenced on June 10, and for a week after there was hardly any 



quiet time night or day ; there were scarcely ten minutes between the 



shocks, and some were felt afterwards during the summer. HI 



1797 Earthquake shocks occurred on September 19 in Hvolhreppr. I 



1799 Earthquake shocks were noticed in the morning of March 31 and the following 



day in Fliotshlid and Landeyjar. I 

 1808 An earthquake worth mentioning occurred. No date or locality given. I 

 1810 A strong earthquake was noticed east of Hekla, and also southwards, 

 October 21. I 



1828 Severe earthquake in Fliotshlid and Landeyjar. No date given. II 



1829 On February 21 and in the night following there were earthquakes all over 



Sudurland. I 



1838 June 12 in the morning early a notable earthquake occurred at Eyrirbakki, 

 in Floi, which was also felt in the Nordurland between Hunafloi and 

 Skjalf andi ; at least there was an earthquake there on the same day. II 

 In the south the shocks continued to June 17. II 



1845-7 Weak earthquake shocks occurred in the country round Hekla during an 

 eruption which lasted from September 2, 1845, to April 6, 1846. They 

 reached almost 28 English miles south-west of the volcano, but only 

 9-14 miles north-east of the mountain. Shocks were noticed in various 

 places in the district, especially from October 4 to 13, 1845, January 11 

 to 18, March 5 and April 4, 1846, After the eruption had ceased, shocks 

 were observed in this district on April 18, May 3 and 8, June 5, Novem- 

 ber 26, 1846, and January 7, March 2 and 3, 1847. The shocks on May 3, 

 1845, were felt also in the Faxafloi area, at Krisuvik and Reykjavik, 

 where shocks were felt also on May 4, August 31, 1846, and February 15, 

 1847. During the eruption some shocks were felt in the Nordurlandar, 

 and sharp shocks were felt during April and May 1847 at Grimsey, an 

 island north of Iceland, just under the Arctic circle. I 



1868 Earthquakes in the Sudurland, November 1 and during the week following. 

 This disturbance originated in the Faxafloi and is mentioned on the list 

 for that area. 



1878 Earthquakes, February 27, in the whole of the south-west of Iceland, 

 particularly in Land, Rangarvellir, the Hreppar, Fliotshlid, and the 

 Vestmanna islands, but were not felt in all places at the same hour. At 

 the same time there was an eruption of flames, in the lava fields north of 

 the Krakutind, to the north of Hekla. I 



1887 October 28. Earthquake at Eyrarbakki in Floi, where the disturbance 

 lasted 10 seconds, and the direction was from north-north-west to south- 

 south-east ; at Kirkjubae in Rangarvellir, where the direction was from 

 north-west to south-east ; also in Fliotshlid, Landeyjar, and Holt. This 

 earthquake extended to the Faxafloi area. II 



1889 Earthquake shocks at Rangarvellir on April 19, the direction being from 

 east-south-east, and at Eyrarbakki in Floi, April 30, where the first 

 shock lasted three seconds, but the principal one, a full second, the direc- 

 tion being from east-south-east to west-north-west. I 



1896 August 26 and 27, and again September 5 and 6, more or less severe earth- 

 quakes occurred in all parts of the Sudurland and on the Vestmanna islands. 

 Several districts were shaken again on September 10. Ill 

 These earthquakes were felt at several distant localities such as Hornafjord 

 on the south-east coast, though not, as it appears, in the Skaptafellsysla, 

 between the Sudurland underland and Hornafjord. They were felt at 

 Reykjavik (August 26 and 27 and September 5), Borgarfjordr and else- 

 where in the Faxafloi area, and on the north-west coast of Iceland even 

 at Isafjordr in the extreme north-west. Ill 



1899 The extensive earthquake in the Nordurland after New Year was felt in the 

 Sudurland, particularly at Eyrarbakki (Floi) on February 27. I 

 The disturbances on the Sudurland in 1887, 1889, and 1899 are not mentioned 

 by Mr. Thoroddscn on his list of earthquakes there ; but in the list of earth- 

 quakes in the Faxafloi. 



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