|Not felt by
people, only detected by seismographs.
|Felt only by a
few people at rest, especially on upper floors of
buildings. Delicately suspended objects may
indoors; like the vibrations due to a passing
truck. Standing motor cars may rock slightly
|Felt indoors by
many people, outdoors by few. Dishes, windows,
doors rattle. May awaken some sleepers. Standing
cars rocked noticeably.
|Felt by nearly
everyone, many awakened. Some dishes and windows
broken; occasional cracked plaster; unstable
objects overturned. Some disturbance of trees,
poles and other tall objects
|Felt by all; many
frightened and run outdoors. Some heavy furniture
moved; some falling plaster or damaged chimneys.
people run outside. Walls crack; chimneys fall.
Considerable damage in poorly designed
structures. Noticed by persons in moving
damage in ordinary substantial buildings with
partial collapse. Fall of chimneys, factory
stacks, columns, monuments, walls. Heavy
furniture overturned. Changes in well water. Car
drivers seriously disturbed.
damage with partial collapse of substantial
buildings. Buildings moved off foundations;
ground cracks conspicuous. Underground pipes
badly; landslides on river banks and steep
slopes; rails bent. Many buildings destroyed.
|Broad fissures in
ground; major landslides and earth slumps;
floods. Few buildings remain standing; bridges
destroyed. Nearly all services (railways,
underground pipes, cables) out of action.
destruction. Ground rises and falls in waves;
lines of sight and level distorted. Objects
thrown into the air.