Magnitude Guide

M< 2.0 — Micro

Not felt by people

Several million/year
M2.0-2.9 — Minor

Felt slightly by some

~1.3M/year
M3.0-3.9 — Minor

Often felt, rarely causes damage

~130K/year
M4.0-4.9 — Light

Noticeable shaking, minimal damage

~13K/year
M5.0-5.9 — Moderate

Can cause major damage to poor structures

~1,319/year
M6.0-6.9 — Strong

Can be destructive in populated areas

~120/year
M7.0-7.9 — Major

Serious damage over large areas

~15/year
M8.0+ — Great

Can destroy communities near epicenter

~1/year