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Alaska landslide unleashed one of the largest tsunamis ever recorded, new study shows

Nypost · · 781 words · By FOX Weather
Geological Hazard Tourism Risk Scientific Discovery
open_in_new Read the original article: https://nypost.com/2026/05/14/us-news/alaska-landslide-unleashed-one-of-the-larg…

psychologyDetected Techniques

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Loaded Language 90% confidence
Using words with strong emotional connotations to influence an audience.
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Appeal to Fear 80% confidence
Building support by instilling anxiety or panic in the audience.
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Exaggeration / Hyperbole 70% confidence
Overstating facts or claims to create a stronger emotional response.

fact_checkFact-Check Results

14 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

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“In the early hours of Aug. 10, 2025, a colossal landslide tore from a mountainside above a softening glacier in Alaska’s Tracy Arm fjord”
CORROBORATED
Multiple independent sources (USGS, Fox Weather, and another news report) confirm a landslide occurred in Tracy Arm, Alaska, on August 10, 2025.
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web search NEUTRAL — 2025-08-14 — Overview of the landslide and preliminary findings. In the early morning of August 10th, 2025, a landslide occurred in Tracy Arm, Alaska, about 80 miles (130 km) south-southeast of Juneau…
https://www.usgs.gov/programs/landslide-hazards/science/2025…
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web search NEUTRAL — On 10 August 2025, a massive landslide occurred in Tracy Arm Fjord in Alaska, triggering a mega-tsunami. Scientists estimate that at least 63.5 million cubic metres – that is 63,500,000 m³ – of materi…
https://eng.geus.dk/about/news/news-archive/2026/may/landsli…
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web search NEUTRAL — On August 10, 2025, a landslide in Alaska’s Tracy Arm triggered a tsunami, and a recent study of the massive debris collapse revealed that the resulting wave was the second-highest tsunami ever record…
https://www.foxweather.com/earth-space/2025-alaska-earthquak…
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“unleashing a massive wave that reached more than 1,500 feet high”
CORROBORATED
Three independent sources confirm the tsunami reached a height of approximately 1,500 feet (specifically cited as 1,500 or 1,578 feet).
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web search NEUTRAL — Tracy Arm’s Post-Tsunami Landscape. 2 days ago.New study confirms landslide in Alaska triggered 1,500-foot megatsunami last August.
https://news.google.com/stories/CAAqNggKIjBDQklTSGpvSmMzUnZj…
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web search NEUTRAL — A huge landslide in Alaska’s Tracy Arm fjord triggered a tsunami whose water ran 1,500 feet up the opposite wall—the second highest runup ever recorded. The study links the event to rapid glacier retr…
https://lamont.columbia.edu/news/near-miss-tsunami-alaskan-c…
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web search NEUTRAL — On Aug. 10 of last year, a massive wave surged up the walls of Tracy Arm Fjord in southeast Alaska, climbing more than 1,578 feet up a cliff face before the tsunami rushed back down the inlet. Accordi…
https://www.thecooldown.com/outdoors/tracy-arm-fjord-tsunami…
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“The 1,578-foot megatsunami tore through a scenic Alaskan waterway 45 miles south of Juneau.”
CORROBORATED
Fox Weather and another source explicitly state the wave was 1,578 feet and occurred 45 miles south of Juneau; Wikipedia confirms the location of Tracy Arm is 45 miles south of Juneau.
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web search NEUTRAL — It is located about 45 miles south of Juneau and 70 miles north of Petersburg, Alaska, off of Holkham Bay and adjacent to Stephens Passage within the Tongass National Forest.
https://en.wikipedia.org/wiki/Tracy_Arm
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web search NEUTRAL — The 481-meter (1,578-foot) megatsunami tore through a scenic Alaskan waterway 45 miles south of Juneau. Now, a new analysis offers a rare glimpse into how the catastrophic landslide and wave unfolded.
https://www.foxweather.com/earth-space/2025-alaska-earthquak…
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web search NEUTRAL — The Tracy Arm fjord tsunami was bigger than the Eiffel Tower.The tsunami was 1,578-feet-tall, or one-and-a-half times the height of the Eiffel Tower. Fortunately, no one was caught in the wave since i…
https://www.popsci.com/environment/tsunami-alaskan-cruise-tr…
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“The study, published in Science, identified the conditions that led to the landslide”
CORROBORATED
Three independent sources confirm that a study regarding the Tracy Arm landslide was published in the journal Science.
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web search NEUTRAL — In a new study published in the journal Science with colleagues, we detail how that landslide sent water and debris 1,580 feet (481 meters) up the other side of the fjord—higher than the top floor of …
https://phys.org/news/2026-05-alaska-nearrecord-landslide-ts…
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web search NEUTRAL — Among other things, the new study, published on Wednesday in the journal Science, revealed how tricky it is to predict such catastrophic landslides before they take place. The Tracy Arm landslide was …
https://www.nytimes.com/2026/05/06/science/tsunami-landslide…
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web search NEUTRAL — A study newly published in the journal Science describes its massive magnitude.No one was hurt in the Tracy Arm landslide and tsunami, a contrast with the 1958 earthquake and tsunami, which resulted i…
https://alaskabeacon.com/2026/05/07/megatsunami-in-alaskas-t…
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“Dan Shugar, corresponding author of the study and associate professor in the Department of Earth, Energy and Environment at the University of Calgary”
SINGLE SOURCE
The provided evidence for this claim consists of BMI calculators, which are completely irrelevant to the identity or profession of Dan Shugar.
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web search NEUTRAL — India's most accurate BMI Calculator. Calculate your Body Mass Index based on revised consensus guidelines for India tailored for the Asian Indian phenotype. Fast, free, and precise.
https://www.bmicalc.in/
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web search NEUTRAL — The Body Mass Index (BMI) Calculator can be used to calculate BMI value and corresponding weight status while taking age into consideration. Use the "Metric Units" tab for the International System of …
https://www.calculator.net/bmi-calculator.html
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web search NEUTRAL — What does it mean to be overweight or obese? Standard Body Mass Index calculator.
https://www.nhlbi.nih.gov/calculate-your-bmi
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“this one was driven by a massive landslide that hurled 64 million cubic meters of debris”
CORROBORATED
Two independent sources (Alaska Beacon and a study summary) confirm the landslide displaced approximately 64 million cubic meters of debris.
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web search NEUTRAL — The landslide dumped 64 million cubic meters of debris into the water, triggering a megatsunami with an initial wave of 328 feet, or 100 meters, the study said.
https://alaskabeacon.com/2026/05/07/megatsunami-in-alaskas-t…
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web search NEUTRAL — What caused the Tracy Arm landslide in Alaska? Rapid retreat of the South Sawyer Glacier, averaging 11-14 meters per year due to climate change, oversteepened the slope, leading to a rock wedge failur…
https://www.academicjobs.com/research-publication-news/alask…
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web search NEUTRAL — Footage from Alaska’s Tracy Arm fjord shows the site where a massive landslide fell into the water, triggering the second-largest tsunami ever recorded. 03:30. Stunning footage captures massive debris…
https://www.foxweather.com/earth-space/2025-alaska-earthquak…
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“the second-largest tsunami wave of all time – narrowly behind the largest tsunami of all time recorded in Lituya Bay, Alaska, on July 9, 1958, that reached a run-up height of 524 meters, or 1,720 feet.”
CORROBORATED
Multiple sources confirm the Tracy Arm tsunami is the second-largest ever recorded, following the 1958 Lituya Bay event which reached 1,720 feet.
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web search NEUTRAL — False-color Landsat 8 image of Lituya Bay, 2020. The damaged trimline is still imprinted in the forest. The lighter green areas along the shore indicate places where forests are younger than older tre…
https://en.wikipedia.org/wiki/1958_Lituya_Bay_earthquake_and…
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web search NEUTRAL — Shugar said the highest-ever recorded tsunami took place in 1958 in Lituya Bay, a fjord on the coast of the southeastern Alaska. The more than 9 mile-long fjord in is Alaska’s Glacier Bay National Par…
https://www.aol.com/articles/alaskas-1-578-foot-tsunami-1818…
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web search NEUTRAL — The landslide-generated tsunami reached a height of 1,580 feet, just short of the deadly earthquake-triggered tsunami in Lituya Bay in 1958, a new study says.
https://alaskabeacon.com/2026/05/07/megatsunami-in-alaskas-t…
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“in the days leading up to the collapse, repeated microseismic activity in the Tracy Arm area increased in frequency, continuing until less than an hour before the slope finally failed.”
SINGLE SOURCE
The provided evidence consists only of dictionary definitions for the word 'increased' and does not provide any factual information regarding seismic activity in Tracy Arm.
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web search NEUTRAL — The meaning of INCREASED is made or become greater : augmented. How to use increased in a sentence.
https://www.merriam-webster.com/dictionary/increased
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web search NEUTRAL — INCREASED meaning: 1. past simple and past participle of increase 2. to (make something) become larger in amount or…. Learn more.
https://dictionary.cambridge.org/us/dictionary/english/incre…
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web search NEUTRAL — Definition of increased adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
https://www.oxfordlearnersdictionaries.com/definition/englis…
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“the retreat of the glacier below the wall, which Shugar said in the year before the slide had retreated 1,800 feet”
INSUFFICIENT EVIDENCE
No evidence was found after searching for the specific claim regarding the 1,800-foot glacier retreat.
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“computer simulations estimating that the Goliath wave traveled over 150 mph”
INSUFFICIENT EVIDENCE
No evidence was found after searching for computer simulations regarding the wave speed of 150 mph.
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“Tracy Arm is a roughly 30-mile-long, 0.8-mile-wide fjord, about 380 meters deep, surrounded by towering peaks rising up to 2,000 meters.”
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“During the summer months, more than 20 boats a day visit Tracy Arms and a neighboring fjord, including large cruise vessels that carry up to 6,000 passengers.”
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“no fatalities were reported.”
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“The landslide occurred around 5:30 a.m. local time”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.