ISOSEISMALS: DISTRIBUTION OF APPARENT INTENSITY. 199 
Tomales to Petaluma (R. 8. Holway). — Route, eastward to corner south of Two 
Rocks, and then southward to Walker Creek; thence eastward to Petaluma. 
The stone house which fell and killed two girls is on this road, less than 2 miles from 
Tomales. Chimneys are generally down, but there are several exceptions. Between 
the lagoons (5 to 6 miles south of west from Petaluma) increased flow of spring water 
is reported. No cracks are reported in the low alluvial land around the lagoons nor in 
Chileno Valley. 
Valley Ford, Sonoma County. Population 300. (R. 8. Holway.) — There are only 3 
brick buildings in the village. One entire wall of the bank fell; other walls were par- 
tially wrecked. The walls of the other two buildings were partially wrecked. A large 
frame house just west of town shifted from its underpinning and was badly wrecked. 
General loss of chimneys and minor damage to small buildings resulted from the shock. 
There are quite a number of cracks in the flat valley-bottom adjacent. A landslide of 
several hundred yards in length but of very slight movement is found on the side of the 
valley directly east of town. The slide has moved just enough to make a furrow-like 
ridge on the lower side and has developed cracks on the upper side. Other small slides 
occur in the vicinity. 
(H. M. LeBaron.) —Valley Ford is about 25 feet above tide water,and there are rocks 
near the surface in many places. Chimneys and objects were thrown north and south; 
the motion of the shock was north and south; and no vertical movement was felt. Brick 
buildings were partially destroyed, and many chimneys were thrown down. The foun- 
dations of many wooden buildings were damaged, some foundations giving way entirely. 
A large, well-built wooden residence of two stories was thrown to the south 3 feet and to 
the east one foot, and caused to drop down 3 feet. 
Bloomfield, Sonoma County. Population 200. (R.S. Holway.) — This village is on the 
north side of the little valley running eastward from Valley Ford. The 3 brick buildings, 
two stores and a dwelling, were wrecked. Every chimney but one reported down. 
Several frame buildings shifted on their foundations. The cemetery is very badly 
wrecked; about 80 per cent of the larger stones fell. Of square monuments of approxi- 
mately the same class, the direction of fall was north 11, west 14, south 8, east 0, south- 
east 1, total of this class, 34. 
Bodega, Sonoma County (H. C. McCaughey).—The town is on a hill slope and creek- 
bottom in a valley surrounded by hills. Chimneys and objects were thrown southerly. 
Several houses were shifted on their foundations, and all chimneys were thrown. Good 
frame buildings with strong foundations were not hurt. There are no brick buildings in 
the place, but a mile from town there is a brick bark-drier. Altho this building is small 
and the brick work was bound together with iron rods, it was thrown into a heap. 
SANTA ROSA. 
In the section of the Coast Ranges inland from the coast, between the latitude of Healds- 
burg and the Bay of San Francisco, Santa Rosa first claims attention. This city, with 
a population of 6,700, suffered relatively more than any other place in California, except 
perhaps Sebastopol and Fort Bragg. Prof. R. S. Holway made a study of the effects 
of the earthquake at Santa Rosa and the surrounding territory, and an excellent report 
by this observer follows: 
Santa Rosa lies on the eastern side of Santa Rosa Valley, which is here some 7 miles 
wide. ‘The valley floor is a gently sloping alluvial plain with an average elevation of about 
150 feet within the city limits, falling with a slight grade to the swampy lands adjacent to 
the Laguna de Santa Rosa, which runs close to the foot-hills on the west. The elevation at 
the Sebastopol railway station is but 68 feet above the sea. 
