ISOSEISTS. DISTRmUTION OF INTENSITY, KTC. 93 



Two railway linos traverse the area : (1) The main lino of the 



Burma Railways from Rangoon to Mandalay, 



Parts of the area an d its continuation on the other side of the 



Sx^JSX - * ° f Irrawaddv from Sagaing to Myitkyina, Enter- 



mg to the south of Yamcthin and leaving 

 iust to the north of Shwebo, the line cuts across the western 

 part of the oval, more or loss parallel to its long axis. This 

 line and the telegraph which runs alongside it wore entirely un- 

 damaged. (2) The other line is the Shan States branch of the 

 Burma Railways which runs from Mandalay to Lashio over the 

 upper part of the oval from south-west to north-oast. Although it 

 rises from the plains in a series of zigzags overhung by preci- 

 pices of very folded strata, and crosses several well known faults, 

 the line was only damaged to the east of Maymyo on the 

 " plateau " itself, where it crosses the great Kyaukkyan fault. This 

 fact adds confirmation to the view already arrived at from a 

 study of the distribution of the intensity, namely that the earth- 

 quake was connected in some way with this fault. The railway 

 lines were bent into a smooth curve close to the actual line 

 of the fault, while cuttings and earth banks in the vicinity had 

 slipped and blocked the line. 



To the north and south of this point and in the neighbour- 

 hood around, the greatest intensity of the quake was experienced. 

 Cracks in the cliffs near Myinpyu gave out streams of mud and 

 water which were voluminous enough to overwhelm and partially 

 destroy Shan houses. Fresh cracks opened in the ground on the 

 Myinpyu hill, and from Kyaukkyan in the Namma circle to Seikpyu. 

 At the latter place a hot spring dried up. Near the northern 

 end of the fault, land and rock slips took place and completely 

 blocked up the Nam-pan-se stream for a time, after which the 

 water forced its way through the barrier. This stream flows along 

 the course of the northern end of the Kyaukkyan fault for some 

 4 or 5 miles before crossing it. Other landslips happened in 

 various places ; indeed, T was informed that the dust from them 

 was visible for days along the Kyaukkyan fault, and gave rise to 

 the belief amongst the Shans that a volcanic eruption had taken place. 

 The great diversitv of architecture within this region tends to 

 complicate deductions regarding the intensity. 



Variety of Arehiteo- 7i irou ,rhout the most shaken area, practically 

 turo. . 



no stone or brick edifices exist outside tho 



