Search results
Results from the WOW.Com Content Network
This zone of intense earthquake activity is located deep within the interior of the North American plate. An intraplate earthquake occurs in the interior of a tectonic plate, in contrast to an interplate earthquake on the boundary of a tectonic plate. [1] [2] They are relatively rare compared to the more familiar interplate earthquakes.
Earthquake – Sudden movement of the Earth's crust Blind thrust earthquake – Movement along a thrust fault that is not visible at the surface; Intraplate earthquake – Earthquake that occurs within the interior of a tectonic plate; Interplate earthquake – Earthquake that occurs at the boundary between two tectonic plates
The 1811–1812 New Madrid earthquakes were a series of intense intraplate earthquakes beginning with an initial earthquake of moment magnitude 7.2–8.2 on December 16, 1811, followed by a moment magnitude 7.4 aftershock on the same day. Two additional earthquakes of similar magnitude followed in January and February 1812.
Another notable intraslab earthquake in the Puget Sound region was the magnitude 6.8 2001 Nisqually earthquake. Intraslab earthquakes in Cascadia occur in areas where the subducting plate has high curvature. [13] Much of the seismicity that occurs off the coast of northern California is due to intraplate deformation within the Gorda plate.
The New Madrid seismic zone (NMSZ), sometimes called the New Madrid fault line (or fault zone or fault system), is a major seismic zone and a prolific source of intraplate earthquakes (earthquakes within a tectonic plate) in the Southern and Midwestern United States, stretching to the southwest from New Madrid, Missouri.
Minor earthquake activity that still continues in the area in the early 21st century may be a continuation of aftershocks. [7] With the development of earthquake studies and technology, this event has been extensively studied as an example of an intraplate earthquake. It is believed to have occurred on faults formed during the break-up of ...
Since 1950, there have been 21 earthquakes of magnitude 6 or above in the Lhasa block, the largest of which was the 6.9-magnitude quake in Mainling in 2017, according to CCTV.
Bathymetry of the northeast corner of the Caribbean plate showing the major faults and plate boundaries; view looking south-west. The main bathymetric features of this area include: the Lesser Antilles Volcanic Arc; the old inactive volcanic arc of the Greater Antilles (Virgin Islands, Puerto Rico, and Hispaniola); the Muertos Trough; and the Puerto Rico Trench formed at the plate boundary ...