7 Interesting Facts About Earthquake
By The News Voice
Earthquakes happen when two large pieces of the Earth's crust suddenly slip. This causes shock waves to shake the surface of the Earth in the form of an earthquake.
The National Earthquake Information Center (NEIC) records an average of 20,000 earthquakes every year, about 50 each day, around the world. But there are millions of earthquakes estimated to occur every year that are too weak to be recorded.
On 11 March 2011, an 8.9 magnitude earthquake which struck northeast Japan altered the distribution of the earth’s mass, causing it to rotate slightly faster, and shortening an earth day by around 1.8 microseconds.
The city of San Francisco is moving toward Los Angeles at the rate of about two inches per year. Its happening because the two sides of the San Andreas Fault are gradually slipping past one another and it will meet in several million years.
On 25 April 2015, a magnitude 7.8 earthquake inflicted severe damage to the nation of Nepal, causing several Himalayan mountains to shrink, including Mount Everest which shrunk by one inch.
The vast majority – in fact about 90% – of the world's earthquakes occur along the Ring of Fire, which is an area in the basin of the Pacific Ocean.
Incan civilisation architecture, for example, Machu Picchu, was built to withstand earthquakes, as are Japanese pagodas.
The largest ever recorded earthquake in the world was a magnitude 9.5 (Mw) in Chile on May 22, 1960.
Due to the improvement in the communications and technically, we are better prepared for earthquakes then ever.