『US Records 715 Earthquakes in One Week: Alaska, California, and Texas Lead Seismic Activity』のカバーアート

US Records 715 Earthquakes in One Week: Alaska, California, and Texas Lead Seismic Activity

US Records 715 Earthquakes in One Week: Alaska, California, and Texas Lead Seismic Activity

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今ならプレミアムプランが3カ月 月額99円

2026年5月12日まで。4か月目以降は月額1,500円で自動更新します。

概要

 In the past seven days, the United States has experienced 715 earthquakes of magnitude 1.5 or greater, according to Earthquake Track data. This steady activity highlights the nation's active seismic zones, particularly in Alaska, California, Texas, and Oklahoma.

Alaska leads with frequent tremors, including a 3.6 magnitude quake 31 kilometers southwest of Petersville on April 7, a 3.4 magnitude event near Naknek early today at 2 kilometers depth, and multiple others like 2.9 magnitude 106 kilometers southeast of Sand Point and 2.8 magnitude 18 kilometers west-northwest of Old Harbor. The week's largest in the state reached 4.9 magnitude near Talkeetna earlier this month, part of ongoing volcanic and tectonic unrest in the Aleutian chain.

California saw a 4.6 magnitude shake in Brookdale this week, the strongest nationwide in that period, alongside a 2.0 magnitude event 6 kilometers northwest of Livermore and 2.9 magnitude 10 kilometers north-northeast of Petrolia on April 3. These reflect the San Andreas Fault system's persistent strain.

Texas recorded notable activity with a 3.5 magnitude quake near Falls City today at 4 kilometers depth, 2.7 magnitude 17 kilometers west-southwest of Coyanosa, 2.1 magnitude 16 kilometers southwest of Coyanosa, and others near Westbrook, Toyah, Pawnee, and Balmorhea. West Texas Permian Basin quakes often link to wastewater injection from oil production.

Oklahoma continues its induced seismicity trend, with 2.5 magnitude 8 kilometers north-northwest of Verden, 2.0 magnitude 16 kilometers west-northwest of Union City on April 6 and 7, and a 2.0 magnitude near Calumet today at 7 kilometers depth. Central United States Earthquake Consortium notes hundreds of small events yearly here, monitored by the Advanced National Seismic System.

Other highlights include a 4.0 magnitude off Oregon's coast on April 7, 2.4 magnitude 14 kilometers northeast of Milford in Utah, and 2.4 magnitude 15 kilometers west of Georgetown in Idaho. No major damage or injuries reported from these mostly shallow quakes.

Emerging patterns show elevated activity in Alaska's subduction zone, human-induced swarms in Texas and Oklahoma, and fault-line rumbles in the West. USGS data underscores regular monitoring to assess risks, with no unusual spikes beyond seasonal norms this week. Worldwide, a 4.7 magnitude hit Japan's Bonin Islands today, but US events dominate regional focus.

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This content was created in partnership and with the help of Artificial Intelligence AI

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