مقياس قوة الزلازل
يقيس مقياس القوة المشابه لريختر طاقة الزلازل المُطلَقة. كل زيادة بمقدار رقم صحيح تمثّل طاقةً أكبر بحوالي 31.6 مرة.
M1
Micro
Micro earthquakes, not felt by humans.
محسوس: Not felt. Detected only by seismographs.
M2
Minor
Minor earthquakes. Felt by few people.
محسوس: Felt by people at rest, on upper floors of tall buildings.
M3
Minor
Often felt, but rarely causes damage.
محسوس: Felt by many indoors; hanging objects swing.
M4
Light
Noticeable shaking of indoor objects. Rarely causes significant damage.
محسوس: Felt by most people; dishes rattle.
الأضرار: Light
M5
Moderate
Can cause major damage to poorly constructed buildings.
محسوس: Causes damage to poorly built structures. Felt by everyone.
الأضرار: Moderate to significant
M6
Strong
Destructive in areas up to 160km from epicenter.
محسوس: Destructive to a moderate radius.
الأضرار: Moderate to severe
M7
Major
Causes serious damage over large areas.
محسوس: Can cause serious damage over wider areas.
الأضرار: Severe
M8
Great
Can cause severe damage in areas several hundred km wide.
محسوس: Major damage to structures; felt at extreme distances.
الأضرار: Severe over large areas
M9
Extreme
Devastating over massive areas. Rare once-per-decade events.
محسوس: Total destruction near epicenter; tsunamis generated.
الأضرار: Catastrophic