The effects of a 6 week dynamic core stability plank exercise. program compared to a traditional supine core stability. strengthening program on diastasis recti abdominis closure, pain, oswestry disability index (ODI) and pelvic floor disability. index scores (PFDI)
Unsourced material may be challenged and removed. (April 2016) (Learn how and when to remove this template message) In seismology, the depth of focus or focal depth refers to 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.
The magnitude of an earthquake is related to the area of the fault on which it occurs-the larger the fault area, the larger the earthquake. The San Andreas Fault is 800 miles long and only about 10-12 miles deep, so that earthquakes larger than magnitude 8.3 are extremely unlikely.hey mostly occur within 1-2 fault lengths of the mainshock. For the largest earthquakes, this is a long distance; it is thought that the 1906 San Francisco earthquake triggered events in southern California, western Nevada, southern central Oregon, and western Arizona, all within 2 days of the mainshock.