ISOSEISMALS: DISTRIBUTION OF APPARENT INTENSITY. 299 
Along the coast northward from Port Harford thru Morro, Cayucas, and Cambria, to 
San Simeon, the intensity gradually rose. At Morro some people in bed and awake 
felt it; many others did not ;. while at San Simeon liquids were somewhat disturbed and 
the shock of the afternoon (of April 18) was also noticed, which was not the case farther 
south. At Piedras Blancas Light-house a clock stopt and the shock was distinctly felt. 
Between San Simeon and Posts the country is almost uninhabited, and not easily 
accessible, so it was not visited. At Posts a clock was stopt. The shock was very appre- 
ciable, and several minor ones have been felt since. At Idlewild several articles were 
thrown from shelves, windows rattled, and the redwoods swayed considerably. At Sur 
a clock was stopt and the shock was apparently a little stronger. At Carmel-by-the-Sea, 
on deep, sandy soil, several people ran out of doors, a cobble-stone chimney fell, and a 
few tall articles were tipt from shelves. 
SAN LUIS OBISPO TO SAN BERNARDINO. 
This portion of the state is on the southern fringe of the region within which the shock 
appealed to the senses. The shock was not exceptional in intensity and the people paid 
little attention to it; therefore records of observations as to the effects produced are few. 
Such reports as have come in, however, indicate that the shock was more or less distinctly 
felt thruout the country north of the Santa Barbara Channel and the Valley of Southern 
California, as far east as San Bernardino. 
Arroyo Grande, San Luis Obispo County (G. P. Ide). — Pendulum clocks facing north 
and south were stopt, while those facing east and west were not. Very few objects were 
overthrown. A hanging object swung east and west in an elliptical orbit. 
Other points south of the town of San Luis Obispo at which the shock was reported 
are: 
Pismo: Hanging objects swung from east to west, and some clocks stopt. 
Edna and Oceano: Clock stopt. 
Port Harford: Slight shock. 
Santa Maria, Santa Barbara County (F. R. Schank). —I was asleep in the second story 
of a brick building and was awakened by the first of 3 shocks. The shock awoke people 
generally and was observed by persons moving about, but did no damage. The motion 
was a slow, easy one. Wooden inside shutters at my windows swung thru a considerable 
arc, and an incandescent lamp suspended by about 5 feet of cord vibrated with an am- 
plitude of about 6 or 7 inches in a plane approximately east-northeast. The length of 
the first and second shocks was 1 or 2 seconds, but the third shock lasted between 12 
and 15 seconds. 
Casmalia, Santa Barbara County (C. H. Stephens). —I was awakened by the jar, 
and the rocking was continued for about a minute, when all became quiet. It then 
started again lightly, getting stronger as it proceeded and gradually dying away in about 
45 seconds. The third shock came quite strong, and 6 waves followed close on each 
other, each stronger than the preceding one. The clock was stopt, and some articles of 
furniture were overturned. 
Surf. — A clock was stopt. 
Lompoc, Santa Barbara County (C. K. Studley). —I was in bed, awakened by the first 
slight trembling. My bed stands east and west, with the head to the west. The first 
shock moved me up and down from head to foot. The second shock rolled me from side 
to side. The first shock gradually increased to a maximum, and then died out; the 
second seemed to be about the same intensity thruout, and stopt suddenly. The latter 
set the window weights on the south side of the house rattling quite rapidly. The hang- 
ing lamp suspended from the ceiling of the lower story by a chain, which would make 
it about equal to a pendulum that beats seconds, swung in an elliptical orbit, the longer 
