eFinder

eFinder

Home › Public Safety and Risk Management › Article

Alaska's near‑record landslide tsunami sent a wave 1,580 feet up the fjord walls

Phys · · 1106 words · By Michael E West; Ezgi Karasözen
Public Safety and Risk Management Scientific Advocacy for Monitoring Infrastructure Climate Change and Geological Instability

Researchers from the Alaska Earthquake Center discuss a massive landslide-induced tsunami in Tracy Arm, Alaska, and the resulting data published in the journal Science. They argue for the implementation of a multi-tiered alert system to mitigate risks for visitors and residents in similar Arctic environments.

open_in_new Read the original article: https://phys.org/news/2026-05-alaska-nearrecord-landslide-tsunami-feet.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

psychologyDetected Techniques

warning
Loaded Language 70% confidence
Using words with strong emotional connotations to influence an audience.
warning
Black-and-White Fallacy 60% confidence
Presenting only two options when more exist.

fact_checkFact-Check Results

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

check_circle Corroborated 8
help Insufficient Evidence 1
check_circle
“On the evening of Aug. 9, 2025, passengers on the Hanse Explorer finished taking selfies and videos of the South Sawyer Glacier, and the ship headed back down the fjord.”
CORROBORATED
Three independent web search results explicitly confirm that on the evening of August 9, 2025, passengers on the Hanse Explorer were taking photos/videos of the South Sawyer Glacier before the ship departed.
menu_book
wikipedia NEUTRAL — Sir Thomas More (7 February 1478 – 6 July 1535), venerated in the Catholic Church as a martyr and saint, was an English lawyer, judge, social philosopher, author, statesman, theologian and noted Renai…
https://en.wikipedia.org/wiki/Thomas_More
travel_explore
web search NEUTRAL — On the evening of August 9, 2025, passengers on the Hanse Explorer yacht finished taking selfies and videos of Alaska’s South Sawyer Glacier, and the ship headed back down the fjord.
https://earthsky.org/earth/2025-alaska-megatsunami-shows-nee…
travel_explore
web search NEUTRAL — On the evening of Aug. 9, 2025, passengers on the Hanse Explorer finished taking selfies and videos of the South Sawyer Glacier, and the ship headed back down the fjord.
https://theconversation.com/alaskas-near-record-landslide-ts…
+ 1 more evidence source
check_circle
“Twelve hours later, a landslide from the adjacent mountain unexpectedly collapsed into the fjord, initiating the second-highest tsunami in recorded history.”
CORROBORATED
Multiple sources confirm a landslide in Tracy Arm on August 10, 2025, triggered a tsunami described as the second-highest in recorded history.
menu_book
wikipedia NEUTRAL — Tracy Arm is a fjord in the U.S. state of Alaska near Juneau (outlet at 57° 46' 40" N 133° 37' 0" W). It is named after Secretary of the Navy Benjamin Franklin Tracy (1889-93). It is located about 45…
https://en.wikipedia.org/wiki/Tracy_Arm
menu_book
wikipedia NEUTRAL — Tracy R. Cortez (born December 10, 1993) is an American professional mixed martial artist who currently competes in the women's Flyweight division of the Ultimate Fighting Championship (UFC). As of Ju…
https://en.wikipedia.org/wiki/Tracy_Cortez
menu_book
wikipedia NEUTRAL — Tyrone Tracy Jr. (born November 23, 1999) is an American professional football running back for the New York Giants of the National Football League (NFL). He played college football for the Iowa Hawk…
https://en.wikipedia.org/wiki/Tyrone_Tracy_Jr.
+ 3 more evidence sources
check_circle
“that landslide sent water and debris 1,580 feet (481 meters) up the other side of the fjord”
CORROBORATED
Multiple independent sources specify the tsunami run-up height as 1,580 feet (or 481 meters) up the fjord wall.
travel_explore
web search NEUTRAL — A 481-meter megatsunami hit Alaska in 2025 after the collapse of a mountain without glacial support, forced six cruise companies to alter routes, and alerted scientists about global risks linked to me…
https://news.google.com/stories/CAAqNggKIjBDQklTSGpvSmMzUnZj…
travel_explore
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…
travel_explore
web search NEUTRAL — The landslide at Tracy Arm Fjord, Alaska, in August last year sent a tsunami wave far up the opposite side of the fjord near South Sawyer Glacier. This 2025 Alaska megatsunami could have led to traged…
https://earthsky.org/earth/2025-alaska-megatsunami-shows-nee…
check_circle
“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”
CORROBORATED
Three sources confirm the publication of a study in the journal Science (2026) titled 'A 481-meter-high landslide-tsunami in a cruise ship–frequented Alaska fjord'.
travel_explore
web search NEUTRAL — Publication details. A 481-meter-high landslide-tsunami in a cruise ship frequented Alaska fjord, Science (2026). DOI: 10.1126/science.aec3187.
https://sciencex.com/news/2026-05-huge-tsunami-popular-area-…
travel_explore
web search NEUTRAL — With fjord regions increasingly visited by cruise ships, and climate change making similar events more likely, this unanticipated, near-miss event highlights the growing risk from landslides and tsuna…
https://news.wwu.edu/inthemedia/a-481-meter-high-landslide-t…
travel_explore
web search NEUTRAL — The study, published in the journal Science on Wednesday, finds that the tsunami in the southeast region of Alaska near the northwest B.C. border might not have happened but for the rapid retreat of a…
https://www.narcity.com/481-metre-alaska-tsunami-a-warning-f…
check_circle
“In the months after, some cruise lines started avoiding Tracy Arm.”
CORROBORATED
Multiple sources report that cruise lines began avoiding or skipping Tracy Arm following the August 2025 event due to safety concerns.
travel_explore
web search NEUTRAL — But this season, major cruise lines are skipping it. A massive landslide last summer sent parts of a glacier crashing into the water, generated a tsunami and pushed a wave high up the opposite mountai…
https://www.juneauindependent.com/post/cruise-companies-are-…
travel_explore
web search NEUTRAL — Cruise Lines Avoid Tracy Arm Fjord After Massive Landslide. 3 days ago. Save for later.Cruises skip Tracy Arm following 2025 landslide.
https://news.google.com/stories/CAAqNggKIjBDQklTSGpvSmMzUnZj…
travel_explore
web search NEUTRAL — The landslide at Tracy Arm Fjord, Alaska, in August last year sent a tsunami wave far up the opposite side of the fjord near South Sawyer Glacier. This 2025 Alaska megatsunami could have led to traged…
https://earthsky.org/earth/2025-alaska-megatsunami-shows-nee…
check_circle
“Multiple major landslides have occurred precisely at the terminus of a retreating glacier.”
CORROBORATED
Multiple sources describe the geological phenomenon where retreating glaciers leave steep, unsupported slopes that lead to landslides in coastal Alaska.
travel_explore
web search NEUTRAL — Landslides are common in the coastal mountains of Alaska where rapid uplift, caused by tectonic forces and long-term ice loss, converges with the erosive forces of precipitation and moving glaciers.
https://www.arcamax.com/knowledge/scienceandtech/technews/s-…
travel_explore
web search NEUTRAL — Once the glacier retreats, the mountain loses its support system, becomes unstable, and eventually succumb to gravity. Who Actually Bears the Risk? If you aren’t a geologist, you might be asking, “So …
https://news-usa.today/alaskas-coastal-fjords-need-new-tsuna…
travel_explore
web search NEUTRAL — Barry Arm, Alaska (Source: NOAA). Retreating glaciers leave behind extremely steep slopes that are no longer buttressed by ice. One potential result: landslides. Worse yet?
https://www.earthscope.org/news/sensing-potentially-tsunamig…
check_circle
“The glacier below the landslide area had experienced rapid calving—large chunks of ice breaking off and falling into the water—and it had retreated more than a third of a mile in the two months prior.”
CORROBORATED
Sources confirm the glacier (South Sawyer) experienced rapid retreat (approximately 500 meters/over a third of a mile) in the months/spring preceding the August 2025 event.
travel_explore
web search NEUTRAL — The Tracy Arm landslide is a powerful example. The landslide occurred in August, when warm ocean waters and heavier precipitation favor both glacier retreat and slope failure.
https://theconversation.com/alaskas-near-record-landslide-ts…
travel_explore
web search NEUTRAL — The landslide at Tracy Arm Fjord, Alaska, in August last year sent a tsunami wave far up the opposite side of the fjord near South Sawyer Glacier. This 2025 Alaska megatsunami could have led to traged…
https://earthsky.org/earth/2025-alaska-megatsunami-shows-nee…
travel_explore
web search NEUTRAL — The most impressive fact is that the South Sawyer Glacier retreated about 500 meters in the spring of 2025 alone. This accelerated retreat left part of the slope exposed and vulnerable. Without the st…
https://en.clickpetroleoegas.com.br/a-glacier-held-a-mountai…
check_circle
“thousands of small seismic tremors that emanated from the area of the slide in the days prior to the mountainside collapsing.”
CORROBORATED
Multiple sources, including the USGS and the Alaska Earthquake Center, report thousands of small seismic tremors preceding the collapse.
travel_explore
web search NEUTRAL — In the early morning of August 10th, 2025, a landslide occurred in Tracy Arm, Alaska, about 80 miles (130 km) south-southeast of Juneau. The landslide generated a tsunami in the fiord. The Alaska Eart…
https://www.usgs.gov/programs/landslide-hazards/science/2025…
travel_explore
web search NEUTRAL — Most provocative are the thousands of small seismic tremors that emanated from the area of the slide in the days prior to the mountainside collapsing. The view from the deck of the Hanse Explorer on A…
https://blog.geogarage.com/2026/05/alaskas-nearrecord-landsl…
travel_explore
web search NEUTRAL — West spotlighted one early, intriguing piece of evidence — a series of small tremors before the bigger slide. "Modest earthquakes, but hundreds or thousands of very small ones," West said.
https://alaskapublic.org/news/environment/2025-08-12/pure-ch…
help
“There is no landslide monitoring system operating yet at this scale in the U.S.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to confirm or deny the current status or existence of a large-scale landslide monitoring system in the U.S.
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.