RECORD OF AFTER-SHOCKS, 
The list of after-shocks given below has been compiled by A. O. Leuschner from 
all reports that have come to hand. These reports include not only communications 
in answer to the three circulars sent out, but also other reports by interested observers. 
In addition many shocks in the list were taken from the separate reports printed in this 
volume. For the sake of completeness the shocks reported by Prof. Alex. McAdie in 
his monthly reports of the California Section of the Climatological Service of the Weather 
Bureau have also been included. A number of shocks have been inserted in the first 
proof from Prof. Alex. McAdie’s Catalogue of Earthquakes on the Pacifie Coast 1897- 
1906.1. It should be stated, however, that this list by no means represents a complete 
enumeration of all after-shocks felt in California since April 18. In general, it may be 
said that the list becomes increasingly incomplete with the lapse of time since the great 
earthquake. This is particularly due to the efforts made by some of the newspapers 
to suppress all news regarding earthquakes in California. The list may be considered 
complete only for Berkeley, California, where several observers have endeavored to record 
every shock. Asa rule the observer’s name is included in the last column, initials being 
used for observers who have reported more than one shock. A key to the initials is 
given at the end of the list. The times are expressed in Pacific Standard Time. 
Record of after-shocks. 







Day. a ae of Duration. |Intensity. Locality. Remarks, 
hm. 8. secs 
Apr. 18, a.m.| 5 18 57.... Gakzse IV 1 Berkeley :320aec0s 8. A. 
5) 10. foes yp Pelee III | San Francisco..... A. G. Mea J. G-), 
Be LOLOL : eee oe eee GOVE See ree: Feeble, A. G. McA. 
Lge eae Se PEs Ill AG jee eeatee? Feeble, A. G. McA.; J. G. P. 
By pa Nags a Bee Ill Berkeleyie se soe A. G. McA. 
5 OAT eee es ee Ill Hureka S2o0..4. ee Northwest-southeast followed 
by a side  cross-motion, 
Persons in beds resting east- 
west not awakened, A. H. B. 
) 20045255 if he 13 Berkeley*.sS.22-e- mks 
5 26% Sees. Nee eee Yas ae San Francisco .... | Feeble, A. G. McA. 5 
Dae teen. Aa lon tl roto Se IGP! 
bes Blbse Oe ae + aE Berkeleya.. seer S. A. 
ip tey WRN 4 I ees Il Ose eter 
DOO) s ss See eee one ee Humboldt Lt. Stn 
5 34 40 De ae Il Berkeley .......-- S. A. 
5 35 Ol 1eSee II CO. acres S. A. 
DO oe ns eee et CO ere S. A. 
5 89" S2 2 ee eee ) i G0: ee ee S. A. 
BASS coe Ce os yey San Francisco .... | Feeble, A. G. McA.; J. G. P. 
2 AS <o0neee Bn een Ill Berkeley... 3-2 e=- Two separate jerks, 8. A. 
5 AS core eyes cee ae ee Phoenix (Ariz.) ... | Slight. West to east. 
5 59's lS eee ee eee Il CO. ace ese S. A. : 
6 00). 22 cec We Sono eee San Mateo Point. 
6 06.2 send eee oes eas San Francisco .... | Light, N. E. 
GelOesbeeee ths see Itt Berkeleyas. eer ne 2max., one at 36s., one at 
41s.,8. A 
O225 el saaee 2 ee IT Oye osc. A. 




1 


mithsonian Miscellaneous Collections, part of vol. XLIX. 
410 
