Richter-scale quakes

Magnitude

Effects

Severe destruction

and loss of life

over large areas

8.0+

Great

Serious damage

over large areas;

loss of life

7.0–7.9

Major

Moderate damage

in populated

areas

6.0–6.9

Strong

Some damage to

weak structures

5.0–5.9

Moderate

Felt by all;

minor breakage

of objects

4.0–4.9

Light

Felt by many

people;

no damage

3.0–3.9

Minor

Generally not felt

but recorded on

local instruments

<3.0

Micro

Current fracking regulations demand operations are suspended immediately if tremors exceed 0.5-magnitude

0.5

Magnitude

Effects

8.0+

Severe destruction and loss

of life over large areas

Great

7.0–7.9

Serious damage over large

areas; loss of life

Major

6.0–6.9

Moderate damage

in populated areas

Strong

5.0–5.9

Some damage to

weak structures

Moderate

4.0–4.9

Felt by all; minor

breakage of objects

Light

3.0–3.9

Felt by many people;

no damage

Minor

<3.0

Generally not felt but

recorded on local instruments

Micro

Current fracking regulations demand operations are suspended immediately if tremors exceed 0.5-magnitude

0.5