Search results
Results from the WOW.Com Content Network
The Tyrrhenian Sea west of Italy is host to a large number of deep-focus earthquakes as deep as 520 kilometres (320 mi) below the surface. [16] However, very few earthquakes occur in the region less than 100 kilometres (62 mi) deep, the majority originating from a depth of around 250–300 kilometres (160–190 mi).
In seismology, the depth of focus or focal depth is the depth at which an earthquake occurs. Earthquakes occurring at a depth of less than 70 km (43 mi) are classified as shallow-focus earthquakes, while those with a focal depth between 70 km (43 mi) and 300 km (190 mi) are commonly termed mid-focus or intermediate-depth earthquakes. [1]
The 2015 Ogasawara earthquake was a 7.8 magnitude earthquake which struck offshore Japan 189 km (117 mi) west northwest of Chichi-jima in the Ogasawara Islands on May 30 at a depth of 664.0 km (412.6 mi). [1] The shaking of the earthquake was observed almost all over Japan, [2] as it was one of the largest deep-focus earthquakes recorded worldwide.
A series of earthquakes and aftershocks striking the border region between southeast Turkey and northwest Syria on Monday is feared to have killed 20,000 people.. The 7.8 magnitude earthquake ...
A related aftershock with a magnitude M w 6.7 occurred at 02:56 local time (14:52 UTC on 24 May), 9 hours after the earthquake, producing a supershear earthquake. It was an extremely deep (640 km or 400 mi) supershear as well as unusually fast at "eight kilometers per second (five miles per second), nearly 50 percent faster than the shear wave ...
In its most general sense, the word earthquake is used to describe any seismic event that generates seismic waves. Earthquakes can occur naturally or be induced by human activities, such as mining, fracking, and nuclear tests. The initial point of rupture is called the hypocenter or focus, while the ground level directly above it is the epicenter.
Induced seismicity, typically minor earthquakes and tremors that are caused by human activity that alters the stresses and strains on the Earth's crust. [10] Interplate earthquake, an earthquake that occurs at the boundary between tectonic plates. [11] Intraplate earthquake, an earthquake that occurs within the interior of a tectonic plate. [12 ...
The approxiamate area of deep-focus earthquakes mentioned in the page text that may be associated with the old subduction at the trench is shaded light red. The Vityaz Trench (also known as the Vitiaz or East Melanesian Trench [ 1 ] ) is an oceanic trench tectonic feature of the South West Pacific Ocean floor.