304 



Sierra Club Bulletin 



No. 



Date 



Time 



45 



Sun. 9/20 



46 Sun. 9/20 



47 



Mon. 9/21 



48 



Tues. 9/29 



Wed. 9/30 



50 I Thur. lo/i 



51 I Thur. 10/ 1 



52 Thur. 10/ 1 



Character of 



53 



Wed. 10/7 



Very heavy. Accom- 

 panied by terrific 

 3 :oo am rumbUngs followed 

 by heavy vibra- 

 tions. 



Heavy. Rumblings 

 and detonations 

 heard at Mineral 

 for first time. Ash- 

 es fell at Mineral 



II :35 am 



Duration I Crater Size 



5 hours 



3 hours 



6 :o5 am 



7:15 pm 



Probably most vio- 

 lent eruption to 

 date. Ash practic- 

 ally obscured sky 

 from Mineral view- 

 point. 



Very heavy. Lumin- 

 ous bodies hurled 

 high into air. Sub 

 stantiated by Tur- 

 ner Mt. lookout 

 and other eye-wit 

 nesses. Demolished 

 lookout house. 



10 :oo pm 

 5:15 am 

 7 :oo am 



12 :oo m 

 6 :20 am 



Heavy. Ashes 

 at Hall's Flat. 

 Heavy. 

 Medium. 

 Medium. 

 Very heavy. 



fell 



Unknown. 



3 hours. 



1 hour. 



2 hours. 

 I hour. 



4 hours. 



No change 

 noted in 

 vents. 



No change 

 noted in 

 vents. 



Vent nearest 

 top on west 

 slope con- 

 siderably 

 enlarged. 

 Equal vol- 

 umes of 

 steam from 

 both sides 

 of mountain 



Estimated 

 length 900 

 ft. Consid- 

 erably 

 wider. 

 Becoming 

 more 

 rounded 

 with each 

 eruption. 



(Signed) W. J. Rushing, 



Forest Supervisor 



Note.— To date there have been over seventy eruptions and one of the 

 latest has been the most violent of all. The Editor 



