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.
(CNN)-- Alaskans were shaken up -- but not, it seems, rattled -- by a 6.2-magnitude earthquake and more than a dozen aftershocks that struck in the state Thursday. The U.S. Geological Survey noted that the biggest tremor struck at 9:51 a.m. local time (1:51 p.m. ET), centered some 80 miles northwest of Anchorage. Its large magnitude was balanced out, somewhat, by how far down it occurred -- 64 miles deep, according to the USGS. Normally, we don't have large magnitude quakes this deep, said Alaska Earthquake Information Center seismologist Natalia Ruppert, noting that the tremor was felt strongly in Fairbanks and as far south as Kodiak. Because it was that deep, it didn't cause as much damage as a shallower quake..