ox SELSMOLOGICAL INVESTIGATION. 



231 



Mejjlies relating to the List on p. 227. 



Magnetometer Movements noted at the Keio Observatory, Richmond, Surrey, 

 England. Superintendent, Dr. Charles Chree, F.R.S. 



No. 



Time of 

 Earthquake 



Magnetometer Disturbances 



IV. 



VIII. 



18 



1889 



n. 51. I 



5 21 A.M. 



7 37 r.M. 



D and II no trace of earthquake. The 

 previous two days were very quiet 

 except for some small movements on 

 the 17th— 1 to 3 P.M. and 5 to 7 P.M. 



On D some very small, apparently 

 ordinary, magnetic movements about 

 7.37. On H small movements — all 

 say on 25th— the large.st between 

 4 and 6 P.M., but no trace of earth- 

 quake. The 24th distinctly quiet, 

 but for slow moderate movements of 

 D about 10 P.M. 



1892. 



5 43 A.M. 



4 21 A.M. 



5 24 P.M. 



1 19 A.M. 



D trifling movements, but they look 

 magnetic. H shows no trace of 

 earthquake. On the 1 Itli very quiet. 

 H shows lots of small movements, 

 the largest (not big) shortly before 

 midnight. 



D and H no earthquake movement. 

 Noon 17th and 10 p.m. on 19th many 

 varied movements. The fastest large 

 change of H on the 18th about 5 and 

 8 p.m. Sharp change of D on 18th 

 between 5 and 5.30 P.M. 



D many small movements, but no 

 certain earthquake. No trace of 

 earthquake on H. Many small dis- 

 turbances on the 4th up to 4.30 p.m. ; 

 pretty sudden commencement on the 

 4th about 2.29 a.m. 



D and H no trace of earthquake. On 

 the 8th many smallish movements 

 from 8 A.m. to 11 P.M. Largest ou 

 D about noon. 



1893. 



6 13 P.M. 



11 G P.M. 



G 20 A.M. 



Certain small movements might he 

 earthquake effect, but there are 

 several not dissimilar at no great time 

 interval. The 9th, but for many 

 small vibratory movements, was 

 quiet. The 8th was generally quiet. 

 A small slow movement of H at 10.40 

 to 11.20 P.M. 



No trace of earthquake on D. Some 

 movements but apparently magnetic, 

 on H. The 2nd was generally quiet. 

 On the 1st two well-marked move- 

 ments last 7.20 to 8.30 P.M. 



No trace of earthquake on D and H. 

 13th and 14th, on the whole, quiet ; 

 on 13th some slow waves en H 

 between 1.45 and 8 P M., also on D 

 about 12.30 to 2 p.m. and about 6 P.M. 



