![]() ![]() Only one relatively minor injury was reported when a 76-year-old woman broke her arm after losing her balance on the stairs of her home.įor more information, visit the USGS National Earthquake Information Center Earthquake Bulletin. At some places along the fault, the quake caused the ground on one side of the fault to slide horizontally a full 2.5 meters (8.2 feet) past the other side. ![]() Geographic Survey put the quake at magnitude 7. A six mile stretch of the main highway running between Anchorage and Fairbanks had to be closed after a three-foot-wide fissure opened up in the road. The EMSC said the quake of magnitude 7.5 had struck at a depth of 63 km (39 miles), while the U.S. Since the last revisions to the map for Alaska in 2007, scientists have made significant advances in understanding active faulting, fault slip rates, and fault behavior. How to prepare for an earthquake Most people in Alaska will survive the next big earthquake with little loss. The quake and tsunamis killed more than 130. The powerful quake knocked sections of the trans-Alaska oil pipeline off its supports, cracked nearby roads, triggered smaller earthquakes in California and Montana, and even rocked houseboats in Louisiana lakes. The National Seismic Hazard Maps developed by the USGS show the spatial probability of peak earthquake-driven ground motion levels. The 1964 quake, which had a magnitude of 8.4, sent 80-foot seismic waves called tsunamis hurtling through the Gulf of Alaska as far south as Oregon. The fault appears as a dark arch running across the image. The shaded-relief image above shows the location of the earthquake, which occurred on the Denali fault alongside the Alaska Range. The Alaskan quake also created new puzzles about how seismic waves trigger unrest thousands of kilometers away. Friday was centered about 3 miles north of downtown near Port MacKenzie at a depth of about 25 miles. With a magnitude of 7.9, the quake was the ninth largest to be recorded in the United States. The magnitude 7.9 event bore a strong resemblance to past breaks on California's San Andreas fault, promising insights into what might set off the next big shaker there. An earthquake with a preliminary magnitude of 4.2 that shook Anchorage just after 6 a.m. ![]() An intense earthquake struck central Alaska about 90 miles south of Fairbanks at 1:12 p.m. ![]()
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