One in October had a magnitude of 7.4, while another quake in July 2020 measured 7.6. The 1964 quake claimed the lives of more than 250 people, destroying Anchorage and unleashing a tsunami that wreaked havoc across the Gulf of Alaska.Īlaska was struck by two weaker earthquakes last year. An earthquake in Anchorage in 2018 caused significant damage Image: Reuters/N. The US state is part of the seismically active Pacific Ring of Fire where earthquakes are very common. Has Alaska been hit by earthquakes before?Īlaska was was hit by a 9.2-magnitude earthquake in March 1964, the strongest ever recorded in North America. When plates snap back into position, the energy from this movement can cause huge waves to form. Japanese public broadcaster NHK reported that there is no risk of tsunami damaging Japan's coast after it said there might be small changes to tide levels.Įarthquakes are the result of sudden movement along faults within the Earth caused by the release of built-up pressure at plate boundaries. Officials at the Pacific Tsunami Warning Center scrapped the alerts when it emerged that the threat was not as great as first feared. In Seward on the Kenai Peninsula, south of Anchorage, sirens blared as residents were ordered to move to higher ground. 21:23:58 UTC 1.7 magnitude, 118 km depth Healy, Alaska, United States. See if there was there an earthquake just now in Alaska, United States. In Alaska, there were no immediate reports of injuries or damage. Several coastal communities had been evacuated as a precaution. Quakes Near Alaska, United States Now, Today, and Recently. But authorities later canceled those warnings. Tsunami warnings were issued for Alaska, Hawaii, and the Pacific territories of Guam and the Northern Mariana Islands. There have been many aftershocks already, and there will be many more. Alaska’s largest earthquakes, exceeding magnitude 8 and even 9, occur primarily in the shallow part of the subduction zone, where the crust of the Pacific Plate sticks and slips past the overlying crust. A magnitude 7.0 earthquake struck near the southern Alaska city of Anchorage on Friday, followed by many aftershocks. Image: Deutsche Welle (DW) Why were the tsunami warnings canceled? Subduction zone earthquakes follow the descent of the Pacific plate down to 200 km or more. The earthquake hit 56 miles (91 kilometers) southeast of the town of Perryville, some 500 miles from Anchorage, Alaska's biggest city. It measured the quake as having a depth of 35 kilometers (21.7 miles). The US Geological Survey (USGS) had initially reported that the magnitude was 7.2. We will update this story if more information becomes available.US authorities lifted a string of tsnuami warnings after an earthquake of magnitude 8.2 struck the Alaska Peninsula on Thursday. Learn more about the USGS Earthquake Hazards Program. The USGS operates a 24/7 National Earthquake Information Center in Colorado that can be reached for more information at 30. To the southeast of the Alaska Trench, two large (M 7.9 and M 7.8) strike slip earthquakes occurred in November 1987 and March 1988, respectively. 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. Depth 14.1 km Time 09:31:40 UTC Contributed by US 6 Moment Tensor Fault Plane Solution Contributed by US 6. 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. Geological Survey (USGS) said the quake was at a depth of 20 miles (32 km). The USGS is coordinating its response with the Alaska Earthquake Center and Alaskan Department of Natural Resources, Geological & Geophysical Surveys. 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. (Reuters) - An earthquake of magnitude 6.2 struck 81 km (50 miles) west of the city of Adak in Alaska at a depth of 10 km, the U.S. A series of aftershocks was recorded following the. 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. The quake was centred about seven miles (11km) north of Anchorage, the largest city in the state, according to the US Geological Survey (USGS). 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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