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In an earthquake, damage to buildings and infrastructure is related more closely to ground motion, of which PGA is a measure, rather than the magnitude of the earthquake itself. For moderate earthquakes, PGA is a reasonably good determinant of damage; in severe earthquakes, damage is more often correlated with peak ground velocity .
A magnitude 4.0 eastern U.S. earthquake typically can be felt at many places as far as 100 km (60 mi) from where it occurred, and it infrequently causes damage near its source."
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Most earthquake clusters consist of small tremors that cause little to no damage, but there is a theory that earthquakes can recur in a regular pattern. [33] Earthquake clustering has been observed, for example, in Parkfield, California where a long-term research study is being conducted around the Parkfield earthquake cluster. [34]
Aug. 28—Some Western Pennsylvanians may have felt trembles from a Sunday night earthquake in the Cleveland area, according to the U.S. Geological Survey. The quake was reported near Madison ...
The earthquake's epicenter was in the Southern Great Lakes seismic zone, about 25 kilometers (16 mi) southwest of Meadville; its depth was 5 kilometers (3 mi).The earthquake caused minor damage in towns near its epicenter and was felt in the states of Ohio, Pennsylvania, Indiana, Michigan, New York, Illinois and New Jersey, as well as Southern Ontario in Canada.
Another earthquake rumbled through the Columbia area as tremors hit overnight. A 2.1 magnitude earthquake was recorded early Sunday morning in the Midlands , according to the U.S. Geological Survey.
The vast majority of the year's fatalities were attributed to a M w 7.5 earthquake that struck the west coast of Honshu in Japan immediately after 2024 began, which was also the strongest event of the year and the deadliest in the country since 2011. Other notable and deadly earthquakes occurred in Taiwan, Indonesia, Papua New Guinea, China ...