About National Richter Scale Day
Charles Francis Richter is most famous as the creator of the Richter magnitude scale, was born on April 26th 1900.
|magnitude level||category||effects||earthquakes per year|
|less than 1.0 to 2.9||micro||generally not felt by people, though recorded on local instruments||more than 100,000|
|3.0–3.9||minor||felt by many people; no damage||12,000–100,000|
|4.0–4.9||light||felt by all; minor breakage of objects||2,000–12,000|
|5.0–5.9||moderate||some damage to weak structures||200–2,000|
|6.0–6.9||strong||moderate damage in populated areas||20–200|
|7.0–7.9||major||serious damage over large areas; loss of life||3–20|
|8.0 and higher||great||severe destruction and loss of life over large areas||fewer than 3|
- Did you know? In 1960, the strongest earthquake on record occurred in Chile. It had a magnitude of 9.5 (out of 10) on the Richter scale.
- Did you know? The most destructive earthquake ever occurred in 1755. It completely destroyed Lisbon, the capital of Portugal.
- Did you know? On 23 January 1556, the deadliest earthquake in history killed about 830 000 people in Shensi, China..