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.
Alaska typically sees a half dozen quakes each year above magnitude 6. Today's tremor was the strongest since a magnitude 7 in the same waters off Kodiak in December 1999, said geophysicist Paul Whitmore at the tsunami warning center. We did not feel it here, but there were reports in Anchorage and down in Seward, Whitmore said.