since a magnitude 8.7 earthquake in the Aleutians in 1965. The very strong quake was located about 56. The earthquake center at the time said it was the biggest quake in the U.S. CNN The 8.2 magnitude earthquake that struck off Alaska’s coast Wednesday night was the strongest one since 1964, an official told CNN. It was widely felt but caused no major damage in the sparsely populated region closest to it. The two 6.9 quakes were the largest aftershocks tallied since the United States experienced its largest earthquake in the past half-century, the magnitude 8.2 quake that struck south of the Alaska Peninsula on July 28. Geological Survey on Twitter had reported a preliminary magnitude of 6.5 that was later revised to 6.9, which ties another earthquake that hit Alaska in August. The quake hit 300 km southeast of Kodiak at a depth of 10 km at 12.21 a.m., the US Geological Survey said. Jeremy Zidek, a spokesperson for Alaska’s emergency management office, said the office was contacting communities and had no reports of damage so far. The center had not received reports of significant damage but also relies on self-reporting, said seismologist Natalia Ruppert. In this work, we report and analyze signals from the 29 July 2021, M w 8.2 Alaska earthquake obtained by the integrated multi-dataset Ocean Networks Canada's (ONC) NEPTUNE observatory ( The 2021 M w 8.2 Chignik, Alaska earthquake is the largest seismic event in US-Canada water since 1965 (Davies et al., 1981). For more info & to submit a DYFI report, pls go to /qWzbtB6wkd- Alaska Earthquake Center October 11, 2021 It is an aftershock of the M8.2 Chignik EQ, & was felt along the AK Peninsula & Kodiak Island. This event is 71 miles E of Chignik, at a depth of 43 miles. Geological Survey said the quake was magnitude 8.2 and hit 56 miles (91 kilometers) east southeast of Perryville, Alaska at about 8:15 p.m. The quake is the largest since 1965, according to United States Geological Survey earthquake records for Alaska. local time, and its epicenter was 65 miles off the Alaska Peninsula village of Perryville, according to the Alaska Earthquake Center. As of 6:00am, Thursday morning the area within a 100 mile radius has received over 30 aftershocks in the past 7 hours. The 8.2 magnitude earthquake, which also sparked fears of a possible tsunami, hit at 10:15 p.m. We will update this story if more information becomes available.We have reviewed a M6.9 EQ on Oct 11, at 1:10 AM. The quake, just 65 miles off the coast of the Alaskan peninsula, was 28 miles deep and was followed minutes later with two aftershocks measuring 6.2 and 5.6 on the Richter Scale. Learn more about the USGS Earthquake Hazards Program. A powerful 8.2-magnitude earthquake struck off the southern coast of Alaska late Wednesday night, prompting a tsunami warning for parts of the state and a tsunami watch as far. The USGS operates a 24/7 National Earthquake Information Center in Colorado that can be reached for more information at 30. If you felt this earthquake, report your experience on the “USGS Did You Feel It?” website for this event.įor information about tsunami watches, warnings or advisories, visit the National Oceanic and Atmospheric Administration (NOAA) tsunami website. For estimates of casualties and damage, visit the USGS Prompt Assessment of Global Earthquakes for Response (PAGER) website. Visit the USGS earthquake event page for more information. The USGS is coordinating its response with the Alaska Earthquake Center and Alaskan Department of Natural Resources, Geological & Geophysical Surveys. Tsunami warnings were lifted for Alaska and the rest of the Pacific after a huge earthquake of 8.2 magnitude struck the seismically active U.S. Large earthquakes in this region are common the same subduction zone hosted the second largest earthquake recorded on modern instrumentation in March 1964 (M9.2 Alaska earthquake), and in 1938 a M8.2 event occurred in a very similar location to today's earthquake. A magnitude 6.9 earthquake struck off the coast of Southwest Alaska early Monday in what the Alaska Earthquake Center called an aftershock of an 8.2 quake in late July. The earthquake occurred as the result of thrust faulting at shallow depth on the subduction zone interface between the Pacific plate and the North America plate, where the Pacific plate begins subducting to the northwest beneath Alaska. USGS scientists expect that this event will trigger aftershocks, but these will decrease in frequency over time. Perceived shaking for the quake was weak to light in Anchorage.Īs of 2:51 am local time, 268 " Did You Feel It?" reports were submitted.
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