Episodios

  • Dozens of Minor Earthquakes Rattle West Coast and Alaska in 2025

    Dozens of Minor Earthquakes Rattle West Coast and Alaska in 2025
    Dec 17 2025
    Over the past week, the United States has experienced dozens of minor to moderate earthquakes, primarily along the tectonically active West Coast and Alaska, according to Earthquake List's up-to-date report for 2025. On December 16, activity peaked with a magnitude 3.8 quake 98 miles southwest of Anchorage, Alaska, at 2:43 a.m. Anchorage time, followed by a 3.4 tremor 117 miles west-southwest of Long Beach, California, at 1:38 p.m. Los Angeles time. That same day, a 3.3 shaker hit 14 miles north-northwest of Oxnard, California, at 7:06 a.m., and a 3.2 event rattled 60 miles north-northwest of Juneau, Alaska, at 8:50 a.m. Juneau time. Other notable shakes included a 3.0 near Hayward, California, nine miles northeast at 5:53 a.m. Los Angeles time, and another 3.0 173 miles southwest of Anchorage at 12:09 p.m.

    Earthquake List data shows continued smaller events into December 17, such as a magnitude 2.1 off Eureka, California, 44 miles west-southwest at 3:43 p.m. Los Angeles time on the 16th. Alaska dominated with frequent quakes near Anchorage, including 2.5 at 119 miles east-northeast, 2.6 16 miles west, and 2.2 64 miles east-northeast, reflecting its position on the Pacific Ring of Fire where the Pacific Plate subducts under North America. California saw clusters off its northern coast near Eureka and Santa Rosa, plus activity near Oxnard and Hayward along the San Andreas Fault system.

    Earlier in the week, USGS significant earthquakes list notes a magnitude 3.1 six kilometers west of Glen Ellen, California, on December 14 at 11:30 p.m. UTC, at shallow three-kilometer depth. GDACS reports a green alert for a minor quake on December 13 at 6:10 a.m. local time in the United States, epicentered at 36.71 degrees north, 71.58 degrees west, depth 22 kilometers, causing no damage.

    Nationwide patterns align with long-term stats: Earthquake List indicates an average 175 magnitude 4-plus quakes yearly within 186 miles of the U.S., or one every two days, with 88 percent magnitude 4, mostly in the West. No major magnitude 6-plus events struck the U.S. proper this week, unlike a powerful magnitude 7.0 off Canada near Whitehorse on Saturday, triggering aftershocks including 5.8 near Juneau and 5.1 farther north, per recent news summaries. Pacific Northwest Seismic Network confirms smaller recent activity, like magnitude 2.3 west of Burney, California, on December 17.

    These events underscore steady seismic hum in quake-prone regions, with no widespread impacts reported, though monitoring continues for potential swarms.

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  • Seismic Surge: Alaska and Japan Rocked by Powerful Earthquakes, Highlighting Ongoing Risks in Earthquake-Prone Regions

    Seismic Surge: Alaska and Japan Rocked by Powerful Earthquakes, Highlighting Ongoing Risks in Earthquake-Prone Regions
    Dec 13 2025
    In the past week, the United States has experienced several significant earthquakes, highlighting ongoing seismic activity in its northern and western regions. On December sixth, a magnitude seven point zero oblique-slip earthquake struck about six miles below the Hubbard Glacier in the Saint Elias Mountains, fifty-five miles north of Yakutat, Alaska, according to the United States Geological Survey. This event, which occurred at approximately eleven forty a.m. Alaska Standard Time, triggered hundreds of coseismic landslides and snow avalanches across Alaska and into Canada. The USGS Ground Failure product predicted substantial ground failures, confirmed by remote sensing that mapped the largest concentrations in a ten-mile-wide band along a thirty-mile fault rupture northwest of the epicenter. No immediate casualties were reported, but the landslides underscore risks in glaciated terrain.

    Two days later, on December eighth, a magnitude seven point six earthquake hit offshore Honshu, Japan, as noted by the British Geological Survey, but it drew attention to trans-Pacific patterns affecting U.S. monitoring. Closer to home, on December twelfth, the ECHO Daily Flash reported a magnitude six point seven quake, later adjusted to six point nine by Japanese officials, off northern Honshu, with aftershocks of five point five and four point seven magnitudes. While offshore Japan, up to one hundred twenty-seven thousand people felt moderate shaking, and tsunami waves reached twenty centimeters along eastern coasts, it followed regional upticks noted in U.S. Pacific alerts.

    Today, December thirteenth, a magnitude five point seven earthquake occurred in the Rat Islands of the Aleutian Islands, United States, at ten fifty-one a.m. UTC, per the National Institute of Geophysics and Volcanology. This remote Pacific chain event adds to Alaska's active profile.

    Emerging patterns show intensified activity along Alaska's subduction zones, where the Pacific Plate dives under North America, fueling oblique-slip quakes and secondary hazards like landslides. Wikipedia's 2025 list reveals no other U.S. mainland events above magnitude four in the last seven days, but the USGS significant earthquakes page flags ongoing vigilance for aftershocks. Globally, a magnitude eight point eight quake tied for sixth largest ever in Kamchatka, Russia, earlier this year, per USGS updates, reminds of the Ring of Fire's volatility encircling U.S. territories. These incidents emphasize preparedness in earthquake-prone Alaska, with no major casualties but clear calls for updated hazard assessments.

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  • Alaskan and Hawaiian Earthquakes Dominate Recent Seismic Activity in the United States

    Alaskan and Hawaiian Earthquakes Dominate Recent Seismic Activity in the United States
    Dec 6 2025
    In the past week, earthquake activity in the United States has been dominated by Alaska and Hawaii, with notable events also off the coast of California and in the central states. According to the United States Geological Survey, the most significant recent event was a very strong magnitude 6 point 8 earthquake that struck south central Alaska near the Gulf of Alaska, north northeast of Yakutat. Volcanodiscovery reports that this quake occurred around midday and was widely felt in coastal communities, though early updates indicate no major damage or tsunami. Earthquakelist notes that this follows a strong magnitude 6 point 0 event near Anchorage earlier in the week, along with a magnitude 4 point 9 shock on Saturday morning, underscoring how active the Alaska subduction zone has been in recent days.

    Farther south, Earthquakelist and United States Geological Survey summaries show a cluster of small to moderate quakes, generally magnitude 2 to 4, off the coast of northern and central California, including events near Salinas and Gilroy. These quakes align with the complex network of faults linked to the San Andreas system, and seismologists note that such activity is typical but serves as a reminder of the constant motion along the Pacific and North American plate boundary.

    In Hawaii, a series of shallow earthquakes south and southwest of Hilo, mostly in the magnitude 2 to 3 range, has been recorded over the past several days, according to Earthquakelist and United States Geological Survey feeds. These quakes are associated with ongoing magmatic and tectonic processes beneath the island of Hawaii and are being closely monitored for any signs of changing volcanic conditions, though no major unrest has been reported.

    Beyond the United States, the British Geological Survey and global catalogs highlight several significant earthquakes worldwide in the last week, including events of around magnitude 5 to 6 in subduction zones bordering the Pacific Ocean. Together, these data show an active but not unusual pattern for a planet where, as the United States Geological Survey emphasizes, thousands of small earthquakes occur every day. The emerging picture from this week is one of heightened attention on Alaska, steady background activity along the West Coast and in Hawaii, and a global pattern that continues to concentrate larger earthquakes along the Pacific Ring of Fire.

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  • "Earthquake Roundup: California and Alaska Rocked, Global Seismic Activity Remains Elevated"

    "Earthquake Roundup: California and Alaska Rocked, Global Seismic Activity Remains Elevated"
    Nov 29 2025
    The United States experienced notable seismic activity over the past week, with California reporting the most significant event. On November 26th, a magnitude 4.0 earthquake struck approximately five miles east of Gilroy, California at a depth of 2.7 kilometers around 6:16 a.m. local time. The United States Geological Survey received over 2,043 reports from people who felt the tremor. Three aftershocks followed, measuring 2.7, 3.6, and 1.9 magnitudes respectively. This Gilroy event was the largest earthquake in the region within the past seven days, though seismic activity in the area has been persistent, with eight earthquakes reported in the past 24 hours, 21 within seven days, and 56 recorded over the past month. There is currently no tsunami threat associated with the California earthquake.

    More dramatically, Alaska experienced a stronger seismic event on November 27th when a magnitude 6.0 earthquake struck approximately 12 kilometers west-northwest of Susitna. This represents more significant seismic activity in the state and marks one of the largest earthquakes recorded in the United States during this reporting period.

    Globally, seismic activity has remained elevated. On November 25th, the world recorded 584 earthquakes within a single 24-hour period. Japan has been particularly active, with a magnitude 6.8 earthquake occurring on November 9th off the coast of Iwate, generating a tsunami with wave heights reaching 20 centimeters in some coastal areas. This was followed by multiple aftershocks measuring 6.4 and 6.0 magnitudes.

    Indonesia has also experienced significant seismic events, with a magnitude 6.6 earthquake striking Aceh on November 27th, resulting in 12 people injured and several building collapses. Afghanistan recorded a magnitude 6.2 earthquake on November 2nd that killed 31 people and injured over 1,100. Meanwhile, Bangladesh experienced a magnitude 5.4 earthquake on November 21st that resulted in 10 deaths and 629 injuries.

    The most recent global data from November 28th and 29th shows continued seismic activity, with magnitude 5.8 earthquakes recorded west of Macquarie Island and in Guatemala. Scientists continue to monitor these patterns closely as seismic activity remains elevated across multiple regions. For those in earthquake-prone areas, particularly California and Alaska, experts recommend maintaining emergency preparedness kits and staying informed through official geological survey updates. The frequency and distribution of recent earthquakes underscore the importance of ongoing earthquake monitoring and public awareness initiatives across vulnerable regions.

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  • Tremors Across the US: Monitoring Seismic Activity and Earthquake Preparedness

    Tremors Across the US: Monitoring Seismic Activity and Earthquake Preparedness
    Nov 26 2025
    Over the past week, seismic activity across the United States has remained relatively modest, with several minor tremors recorded in California and the Pacific Northwest, though none causing significant damage or casualties. The most notable recent earthquakes in the United States occurred in California, where a magnitude 2.7 earthquake struck nine kilometers east of Gilroy on November 26, and a magnitude 2.8 event was recorded near Sparks, Oklahoma on November 25. These smaller tremors have been part of a broader pattern of seismic activity throughout the region.

    In Northern California, the Pacific Northwest Seismic Network documented multiple earthquakes in recent days. A magnitude 3.1 earthquake struck twenty-three kilometers west of Petrolia on November 15, while several other minor quakes ranging from magnitude 1.4 to 2.6 were recorded near Grants Pass in Oregon and various locations throughout Washington State. These tremors, though felt by residents in some areas, caused no reported damage or injuries.

    Meanwhile, the global seismic landscape has experienced more significant activity. The largest earthquake recorded worldwide in the past week occurred on November 25 in Kumamoto, Japan, measuring magnitude 5.4, followed by another magnitude 5.4 earthquake in the Philippines. Earlier in November, Japan experienced a magnitude 6.8 earthquake off the coast of Iwate on November 9, which generated tsunami waves up to twenty centimeters in height in certain coastal areas. A magnitude 6.2 earthquake also struck Afghanistan's Balkh region on November 2, resulting in thirty-one deaths and over one thousand injuries, making it one of the deadliest seismic events in November. Additionally, on November 21, Bangladesh experienced a magnitude 5.4 earthquake near Dhaka that killed ten people and injured six hundred twenty-nine others.

    Earthquake monitoring networks continue to track hundreds of tremors daily, with over five hundred eighty-four earthquakes exceeding magnitude 2.0 recorded worldwide in a single twenty-four hour period as of November 26. The Pacific Ring of Fire, which encompasses Japan, the Philippines, and other regions, remains one of the most seismically active zones on Earth.

    For residents in earthquake-prone areas of the United States, particularly in California, the Pacific Northwest, and other tectonically active regions, experts continue recommending earthquake preparedness measures including securing furniture, identifying safe spots in buildings, and maintaining emergency kits. While recent seismic activity in the continental United States has been relatively minor compared to international events, the consistent monitoring and reporting of even small earthquakes helps scientists better understand regional fault systems and potential future hazards.

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  • "Moderate Earthquakes Rattle Alaska and West Coast, Highlighting Persistent Seismic Activity"

    "Moderate Earthquakes Rattle Alaska and West Coast, Highlighting Persistent Seismic Activity"
    Nov 24 2025
    In the past week, the United States has experienced a series of notable earthquakes, particularly concentrated in Alaska and the western states. According to Earthquake List, a shallow magnitude 4 point 9 earthquake struck near Anchorage on Saturday morning, continuing a trend of seismic activity in the region. Earlier in the week, there was a magnitude 4 point 1 event near Paso Robles in California on Tuesday morning, while on Thursday morning a shallow magnitude 5 point 4 quake was recorded about 110 miles from Anchorage, emphasizing Alaska’s status as one of the most seismically active regions in the nation. On Friday afternoon, a magnitude 4 point 6 earthquake also struck 64 miles from Anchorage, and that same Thursday evening, a magnitude 5 point 9 earthquake hit in the North Pacific Ocean, approximately 215 miles from Eugene, Oregon, underlining continued movement along tectonic boundaries on the West Coast.

    Daily reports show frequent smaller quakes, ranging from magnitude 2 to magnitude 3 point 2, scattered across areas including southern California, Texas, Oklahoma, Colorado, Tennessee, Hawaii, and Alaska, with many of these events occurring near major population centers like Anchorage and Los Angeles. Alaska, in particular, saw multiple low magnitude events within a 24-hour period, most of them shallow, which suggests ongoing tectonic stress release along the Pacific Plate boundary. The U.S. Geological Survey notes that moderate quakes such as a magnitude 4 point 7 event about 47 miles west of Anchorage also occurred early Saturday, November 22. No major damage or casualties have been reported from these incidents so far.

    On a historical note, data from Earthquake List indicates that Alaska and California remain the most commonly affected by larger magnitude earthquakes in the United States, with the strongest recent quake being a magnitude 7 point 1 event near Anchorage in November 2018. The marked frequency of moderate but shallow earthquakes near Anchorage this week is consistent with established regional patterns, a reminder that the U.S. Pacific Rim, including Alaska and the West Coast, is part of the highly active Ring of Fire.

    Globally, the largest earthquake reported in the past week was a magnitude 6 point 8 event off the coast of Iwate, Japan, as reported by VolcanoDiscovery, alongside a magnitude 5 point 3 quake in the Andaman or Burma Sea near Myanmar. Although these international events are not directly connected to U.S. hazards, they reflect broader global seismic patterns, indicating persistent activity along the world’s major plate boundaries.

    In summary, the past seven days have seen a concentration of moderate earthquakes in Alaska and continuing low-level activity along the U.S. West Coast, with the most significant U.S. events remaining below the threshold for serious damage. The absence of high casualties or destruction highlights the preparedness of regions like Alaska, but the consistent pattern of seismicity underscores the continued need for vigilance and robust monitoring across the country.

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  • "Moderate Earthquakes Rattle California, Alaska, and Pacific Rim Regions"

    "Moderate Earthquakes Rattle California, Alaska, and Pacific Rim Regions"
    Nov 19 2025
    Over the past week, seismic activity in the United States has included a series of moderate earthquakes, notably in California and Alaska. According to the United States Geological Survey and real-time earthquake trackers, a magnitude four point one earthquake struck early Tuesday morning near Paso Robles, California. Local news sources and US Geological Survey updates indicate that this quake was shallow, which typically increases ground shaking but reduces widespread damage. On Monday night, a magnitude four point three event occurred near Berkeley, also in California, drawing attention from local residents but resulting in no serious injuries or infrastructure damage. The region has experienced several smaller tremors, with most measuring between magnitude two and four, the majority centered in Northern California and along the Pacific Coast.

    Alaska has seen sustained seismic activity, consistent with its position along the tectonic boundary of the Pacific and North American plates. Last Thursday, Alaska experienced a magnitude five point four earthquake roughly one hundred ten miles from Anchorage, followed by a magnitude four point six event around sixty-four miles from Anchorage on Friday afternoon according to Earthquakelist dot org. These quakes are considered moderate but within the norm for Alaska, which historically averages a significant number of larger-magnitude events each year.

    Beyond the United States, global seismic activity has been considerable. In the past seven days, Costa Rica's North Pacific region was struck by two magnitude five point four earthquakes, impacting coastal travel and drawing attention from international monitoring agencies as reported by Open Mind Channel on YouTube. Venezuela experienced a magnitude five point two quake northwest of Gueiria according to Volcanodiscovery dot com, and Japan’s coast has also been marked by strong offshore quakes above magnitude five, contributing to a worldwide total of over five hundred earthquakes tracked, five of which were magnitude five or higher.

    Emerging patterns highlight that the West Coast of the United States, Alaska, and certain Pacific Rim regions continue to experience regular moderate seismicity. No magnitude six or higher earthquakes have struck US territory in the past week, and the strongest event recorded nationally was the magnitude five point nine earthquake in the North Pacific Ocean, roughly two hundred fifteen miles from Eugene, Oregon, late last week according to Earthquakelist dot org.

    Overall, recent data shows that the United States averages over one hundred seventy earthquakes of magnitude four or greater each year and the vast majority are non-destructive. However, experts emphasize ongoing readiness in historically active regions. Deep and shallow earthquakes alike remain a focus for research as scientists seek to refine prediction and early warning systems, especially for populous or high-risk coastal cities. The past week's activity reflects ongoing global seismic dynamics with significant activity frequently observed in Pacific-adjacent regions.

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  • Recent Surge in U.S. Seismic Activity: Experts Caution Ongoing Earthquake Risks

    Recent Surge in U.S. Seismic Activity: Experts Caution Ongoing Earthquake Risks
    Nov 15 2025
    Over the past week, the United States has seen a noticeable uptick in seismic activity. According to Earthquake List, the most recent events include a magnitude two point five earthquake striking southwest of Anchorage, Alaska just after midnight on November fifteenth. Multiple small quakes also clustered near Midland, Texas, and Fontana, California, highlighted ongoing seismic movement in central and western regions. On November fourteenth, a magnitude three point four earthquake was recorded near San Antonio, Texas, and in California, tremors were detected north-northwest of Las Vegas and southeast of San Diego, providing evidence of persistent activity along known fault lines. Hawaii experienced several minor earthquakes near Hilo, a reminder of the continued seismic risks in volcanic regions.

    More significant U.S. events unfolded earlier in the week. On Thursday morning, a shallow magnitude five point four earthquake struck about one hundred ten miles from Anchorage. This was followed on Friday afternoon by a magnitude four point six quake, also in the vicinity of Anchorage. In the North Pacific Ocean, two substantial offshore earthquakes—magnitude five point nine and magnitude five point seven—occurred near Eugene and Grants Pass, Oregon, raising attention to possible undersea fault movement along the Pacific coast. On Monday night, a magnitude four point three quake was reported near Berkeley, California, which is situated close to the well-known Hayward Fault.

    Earthquake List notes that, over the past decade, the United States typically experiences an average of one hundred seventy six magnitude four or higher earthquakes each year, which equates to roughly one event every two days. The vast majority register at magnitude four, with less than one percent reaching magnitude six or above. The strongest earthquake in the last ten years was a seven point one event in 2018 near Anchorage.

    Globally, according to the United States Geological Survey and Volcano Discovery, the past week has also been active. On November ninth, seven earthquakes of magnitude five point zero or higher were reported worldwide, with the largest, a magnitude five point six, striking in the North Pacific Ocean near Japan. Other recent major quakes have occurred in Indonesia and Tonga, and a magnitude six point three event recently hit Balkh in northern Afghanistan.

    Geologists are observing some emerging patterns: recent U.S. seismicity is concentrated around known fault zones in Alaska, California, and the Pacific Northwest. Offshore quakes near Oregon suggest ongoing tectonic changes beneath the ocean floor, which may have implications for tsunami risk and plate movement. Internationally, clusters of quakes around the Pacific Rim are consistent with long-term trends in the seismically active "Ring of Fire." While most recent earthquakes in the U.S. have caused minimal damage, the pattern underscores the importance of continued monitoring and preparedness across regions prone to earthquake hazards.

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