how much si the magnitude of earthquake

Earthquake magnitude is usually measured on a logarithmic scale, so each whole number increase means a much larger quake, not just a little bigger one. In simple terms, a magnitude 6 quake is much stronger than a magnitude 5 quake, and a magnitude 7 quake is stronger still.

Quick Scoop

• 2.5 or less: usually not felt, but can be recorded.

• 2.5 to 5.4: often felt, usually minor damage.

• 5.5 to 6.0: slight damage.

• 6.1 to 6.9: can cause a lot of damage in populated areas.

• 7.0 to 7.9: major earthquake, serious damage.

• 8.0 or greater: great earthquake, can destroy communities near the epicenter.

In plain language

If you’re asking “how much is the magnitude of earthquake,” the answer is that it is the size of the quake measured by seismic waves. For example, recent reporting described earthquakes in Venezuela as magnitude 7.5 and 7.2 , which are both major quakes.

Why it matters

Magnitude helps show how much energy an earthquake released, but damage also depends on depth, distance from the epicenter, building strength, and local ground conditions. That means two quakes with the same magnitude can have very different impacts.

Rule of thumb

A quick way to remember it is:

• 5s = moderate to potentially damaging.
• 6s = damaging.
• 7s = severe.
• 8+ = catastrophic near the source.