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For instance, an earthquake of magnitude 6.0 releases approximately 32 times more energy than a 5.0 magnitude earthquake and a 7.0 magnitude earthquake releases 1,000 times more energy than a 5.0 magnitude earthquake. An 8.6-magnitude earthquake releases the same amount of energy as 10,000 atomic bombs of the size used in World War II. [18]
Millions of minor earthquakes occur every year worldwide, equating to hundreds every hour every day. [15] On the other hand, earthquakes of magnitude ≥8.0 occur about once a year, on average. [15] The largest recorded earthquake was the Great Chilean earthquake of May 22, 1960, which had a magnitude of 9.5 on the moment magnitude scale. [16]
Earthquakes are common on the West Coast, with multiple plate boundaries like the San Andreas fault making geologic activity more likely. They are rarer on the East Coast, but they do happen .
Large numbers of earthquakes of smaller magnitude occur very regularly due to the meeting of major tectonic plates in the region. Based on the records of the USGS , Indonesia has had more than 150 earthquakes with magnitude > 7 in the period 1901–2019.
The United States typically has around 63 earthquakes between magnitude 5.0 and 5.9 each year, according to the U.S. Geological Survey, about five between 6.0 and 6.9 and fewer than one between 7. ...
Most events occur at depths shallower than about 40 km, but some occur as deep as 700 km. P and S waves separating with time A quick way to determine the distance from a location to the origin of a seismic wave less than 200 km away is to take the difference in arrival time of the P wave and the S wave in seconds and multiply by 8 kilometers ...
Tsunamis can occur when an underwater earthquake rapidly displaces massive amounts of water, leading to a large, long wave that builds in intensity as it crosses the ocean. When it reaches land it ...
2004 Chūetsu earthquake: October 23, 2004 6.6 M w: Kawaguchi 2011 Tōhoku earthquake: March 11, 2011 9.0 M w: Kurihara [21] 2016 Kumamoto earthquakes: April 14, 2016 6.2 M w: Mashiki April 16, 2016 7.0 M w: Nishihara, Mashiki (Kumamoto) 2018 Hokkaido Eastern Iburi earthquake: September 6, 2018 6.6 M w: Atsuma 2024 Noto earthquake