100 ART. 3.— B. KOTÙ : 



To summarize from the data given above, the local earth- 

 quakes at the northwestern foot of the volcano Kirishima began 

 suddenly with moderate intensity which culminated at the second 

 period a, when the sympathetic Iju-in earthquake at the west of 

 Kacroshima shook the ground violently. Even within the narrow 



O 'CD »/ 



seismic area of Yoshimatsu the epicentres shifted from west to east. 

 The daily maximal frequency of earthquakes happened 2 hours 

 later than the arrival of the daily maximal atmospheric pressure/^ 

 the average daily maximum pressure of the atmosphere during the 

 earthquake -swarm being 8-12 a.m. and especially 10-12 p.m. ; thus 

 corroborating the long- established rule that high pressure determines 

 the precise moment of quaking, and also of vulcanism. 



The salient feature noticeable in the above table is, that the 

 volcanic vent burst open during the waning third period of the 

 earthquake-swarm, when shocks became irregular and interrupted 

 with intensified quaking (strong earthquakes 35\). 



As to the volcanic activity of Kirishima with which the 

 perimetric Yoshimatsu earthquakes had decidedly a close relation, 

 the /zVsi eruption occurred on November 8th, 1913, 11p.m., ejecting 

 ashes and sending up flames, and shattering windows in the city of 

 Kagoshima through air-concussions. The event happened after 

 high atmospheric pressure. The second explosion of high intensity 

 was on December 9th, 4.15 a.m., again after a maximal atmospheric 

 pressure, with ashes and flames as usual. The volcano was 

 treacherously silent till the very moment of outburst, as the writer 

 has often experienced in the explosions of Asama. The third ex- 

 plosion took place on January 8th, 1914, 2.20 a.m., again after 

 maximal atmospheric pressure. Since then Kirishima has remained 



1) See the data appended iu the said ' Eeport." 



