Earthquakes

Earthquake Scale

Earthquakes are measured using scales like the Moment Magnitude Scale (which is the modern standard) and the older Richter scale, which quantify the earthquake's magnitude based on seismic energy released. Another scale, the Modified Mercalli Scale, is used to measure the earthquake's intensity or its effects on people and structures in a specific location. Both magnitude and intensity are important for understanding an earthquake's severity.

< 3.5: Generally not felt, but recorded by seismographs. 3.5–5.4: Often felt, but rarely causes damage.

5.5–6.0: Causes slight damage to well-designed buildings, and moderate damage to poorly constructed ones.

6.1–6.9: Can cause significant damage in populated areas.

7.0–7.9: A major earthquake that causes serious damage over larger areas.

8 or greater: A "great" earthquake that causes widespread destruction and can destroy entire communities.