japanese seismic intensity scale and acceleration table
  
Previous Scale
New Scale
Scale
How to call
Status
Acceleration(gal)
scale
Measured scale
0
Earthquake
of no feeling
Imperceptible to people. Only recorded on the recorder
Less than 0.8
0
Less than 0.5
1
A slight earthquake
Felt by only some people in the building.
0.8~2.5
1
0.5 and above
Less than 1.5
2
A weak earthquake
Felt by most people in the building. Hanging objects such as lamps swing slightly.
2.5~8.0
2
1.5 and above
Less than 2.5
3
A mild earthquake
Dishes in a cupboard rattle occasionally.
Electric wires swing slightly.
8.0~25
3
2.5 and above
Less than 3.5
4
A moderate earthquake
Hanging objects swing considerably and unstable
ornaments fall occasionally.
25~80
4
3.5 and above
Less than 4.5
5
A very strong earthquake
Occasionally, less earthquake resistant houses suffer damage to walls and pillars.
Occasionally, cracks are formed in walls.
80~250
5 Lower
4.5 and above
Less than 5.0
5 Upper
5.0 and above
Less than 5.5
6
A disastrous earthquake
Less 30 percents of houses falls down.
Landslide and cracks in the ground resulted.
250~400
6 Lower
5.5 and above
Less than 6.0
6 Upper
6.0 and above
Less than 6.5
7
A severe earthquake
More than 30% houses falls down.
Landslide and cracks in the ground resulted
400 and above
7
6.5 and above
line
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