ISOSEISMALS: DISTRIBUTION OF APPARENT INTENSITY. 267 
badly strained. The water in the reservoir was spilt from northeast to southwest. 
In an old house near the summit the stove was not moved at all, but the chimney built 
40 years ago fell. 
(S. Taber.) —For some distance on the west side of the summit sandstone blocks had 
been cracked off and scattered across the road. From the summit of the ridge to the 
Portola Valley, the only effects noted were the wreck of a ramshackle old barn and a 
3-inch crack across the road (at 36, map No. 22), probably due to settling. 
Congress Springs to Boulder Creek (B. Bryan). — From Congress Springs, following the 
road that passes along the valley, about a mile east of the Castle Rock Ridge, in a south- 
easterly direction toward the reservoir of the San Jose Water Company, evidences were 
found that the earthquake had an intensity of over IX. The walls of a stone barn had 
been thrown down, 1,000-gallon wine-tanks in a cellar had been shifted, and people in 
the houses were thrown down while trying to get outdoors at the time of the shock. In 
a house close by, at the south end of the dam, the first floor plaster fell. Poorly built 
foundations fell. Southeast of the reservoir the chimneys and water-tanks were down. 
Two water-tanks at and near the bend of the road (at 37, map No. 22), were standing, 
but 0.5 mile northwest of this place a water-tank had fallen. The water in the reservoir 
(at 38, map No. 22) had overflowed the 3-foot banks, but the water-tanks were standing. 
A short distance down the road, to the northeast of the reservoir, another tank was 
standing. A house 0.75 mile east of this reservoir was badly shaken, with loss of plaster 
and chimney. In the section a mile east of the fault-line (at 39, map No. 22) the shock 
was weaker. All the chimneys on cottages were standing as far as could be seen, as well 
as all the water-tanks. The bridges 0.5 mile southeast of the reservoir were considerably 
shaken. Cracks seemingly continuous in the direction of the fault-line ran thru the area 
0.75 mile east of the fault-line. Two-story frame houses along the fault line 1 mile south- 
east of the reservoir mentioned were so damaged within that people were living outdoors; 
yet the shake had not broken a 6-inch flag pole on a 2-story frame house. A large 
redwood tree had been shaken down (near 40, map No. 22); the house near it had its 
chimney fractured down to the fireplace, and the stove and piano were thrown across the 
room. The water-pipes here were badly displaced and broken. ‘The intensity was 
greatly diminished, however, near 41, map No. 22; chimneys did not fall, tho fractured; 
clocks were stopt; little rock was thrown down from a vertical outside wall 15 feet high. 
On Deer Creek a large landslide started from near Grizzly Rock and slid westward, but 
changed its direction 60° or more farther down toward the creek. The mill in the creek 
bottom below the slide was partly buried, and one man was killed. It is 500 feet from 
the mill in the gulch to the top, at the point where the slide started. The slide covered 
about 25 acres of ground, and destroyed a lot of virgin timber from 3 to 10 feet in diam- 
eter. The slide material, which is 300 feet deep, is composed of soil, clay, and shale. 
The shock could not have been very strong at 42, map No. 22. The houses stand on 
posts 10 to 15 feet high, but were not moved noticeably. Furniture facing most nearly 
north and south was thrown down, but not when facing in other directions. The inhabit- 
ants were badly frightened and ran outdoors without waiting to dress. On Bear Creek 
(at 43, map No. 22) a smaller slide had moved a few hundred feet, buried a hut, and 
killed one man. According to reports of men in this region, only a minute elapsed after 
the beginning of the earthquake before the slide was over. Down in the valley no cracks 
or other evidence of violent disturbance could be seen. 
Farther southwest down Bear Creek, about 1.5 miles from the village of Boulder Creek, 
were evidences of a less severe shock. A chimney on a I-story house did not fall, tho 
the furniture in the house was thrown down. ‘Trees were violently shaken. A mile 
northeast of Boulder Creek a chimney on a 2-story house was down, but no buildings 
were moved or broken. 
