1936 State Line earthquake was centered on Umapine . Near Umapine there were cracks in the ground up to 6 inches ( 15 cm ) wide that had water flowing out of them , demonstrating soil liquefaction . Some cracks were 8 feet ( 2.4 m ) deep.Observers in Walla Walla noted rumbling noises immediately preceding the first shocks . At one point the ground dropped by 2.4 metres ( 7.9 ft ) . About 70 % of headstones at a nearby cemetery were found to have been rotated clockwise
1936 State Line earthquake
1936 State Line earthquake
Umapine, Oregon