11/10/2023 0 Comments Kodiak alaska quake"The once quiet "Shumagin Gap" isn't so quiet anymore!" the tweet said. The temblor late Saturday occurred in the same region as several other earthquakes over 7 magnitude in the past few years, The Center said via Twitter. In 1964, a magnitude 9.2 earthquake in Prince William Sound caused extensive damage throughout south-central Alaska. It is the U.S.'s most seismically active state and location of the second-largest earthquake ever recorded, according to the Alaska Earthquake Center. Small sea level changes were still possible, KTUU reported.Īlaska experiences thousands of earthquakes each year, most of which are too deep and too small to be felt. Residents were advised not to reoccupy hazard zones without clearance from local emergency officials, KTUU reported. There were an estimated eight aftershocks in the same area of Alaska, including one measuring 5.0 magnitude within three minutes of the original earthquake, KTUU-TV reported. The Hawaii Emergency Management Agency said shortly after the tsunami warning went out that there was no threat to the islands. The agency cancelled the advisory about an hour after the first alert.īefore the cancellation, the National Weather Service in Anchorage, Alaska, tweeted that the tsunami advisory applied to coastal Alaska from Chignik Bay to Unimak Pass, but Kodiak Island and the Kenai Peninsula were not expected to be impacted. National Weather Service sent a tsunami advisory saying the quake occurred at a depth of 13 miles (21 kilometres). The quake initially was reported as 7.4 magnitude but downgraded to 7.2 soon after. ![]() The United States Geological Survey wrote in a social media post that the earthquake occurred 106 kilometres (65.8 miles) south of Sand Point, Alaska, at 10:48 p.m. In Kodiak, Alaska, sirens warned of a possible tsunami and sent people driving to shelters late at night, according to video posted to social media. ![]() The earthquake was felt widely throughout the Aleutian Islands, the Alaskan Peninsula and Cook Inlet regions, according to the Alaska Earthquake Center. The National Tsunami Warning Center immediately issued tsunami warnings, leading to evacuations in communities across southern Alaska. 23, 180 miles southeast of Kodiak Island in the Gulf of Alaska. In 1912, a series of M7+ earthquakes were associated with the Novarupta eruption, which was the largest volcanic eruption of the 20th century worldwide.A 7.2 magnitude earthquake triggered a brief tsunami advisory for southern Alaska late Saturday, but the advisory was cancelled about an hour later, monitoring bodies reported. The years largest earthquake in Alaska struck at 12:31am on Jan. (3) Crustal seismicity in this region can be attributed to the Kodiak Platform Fault Zone and the volcanic arc. Both earthquakes caused damage and disruption to the city of Kodiak and other communities on the island. The most notable examples of such earthquakes are the Kodiak Island M7.0 events of 1999 and M6.9 events of 2001. The Aleutian-Alaska Wadati-Benioff Zone produces thousands of earthquakes each year, most of which are too deep and too small to be felt. ![]() In the Alaska Peninsula region, seismicity decreases at approximately 150 miles (241 km) depth, reflecting the downdip extent of the Pacific plate. This area extends along the Aleutian Arc, the Alaska Peninsula, and Cook Inlet. (2) Intermediate depth seismicity (below 20 miles/32 km) occurs in the Wadati-Benioff zone, where the subducting Pacific plate descends into the mantle beneath the North American plate. While these recent earthquakes did not produce damaging tsunamis, previous tsunamis were documented in historical records of Russian communities and in recently discovered paleotsunami sites. 23 mi S of Kodiak: 33: 0.9: September 23, 12:02 AM 27 mi SE of Manley Hot Springs: 8: 1.2: September 22, 11:52 PM 5 mi SE of Willow: 19: 1.4: September 22, 11:44 PM 16 mi W of Valdez: 6: 1.8: September 22, 11:44 PM 15 mi NW of Akhiok: 22: 0. More recent examples include the 2020 M7.8 Simeonof earthquake in the Shumagin Islands and the 2021 M8.2 Chignik earthquake southwest of Kodiak Island. Seismicity in the Alaska Peninsula region is produced by different tectonic features: (1) The Aleutian megathrust is the source of the region’s strongest earthquakes.
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