GnRH stimulates the pituitary gland to produce follicle stimulating hormone (FSH), the hormone responsible for starting follicle (egg) development and causing the level of estrogen, the primary female hormone, to rise.
The Great Alaska Earthquake lasted for nearly five minutes and registered a magnitude of 9.2, still the largest ever recorded in North America and second only to the 9.5-magnitude quake that struck Chile in 1960.
Fifty years ago, a 9.2-magnitude earthquake rocked Alaska for nearly five minutes. Once the shaking from the largest earthquake ever recorded in North America stopped, however, the worst was yet to come. [slideshow]As the sunlight waned on March 27, 1964, Alaskaâs frozen ground shivered violently.