The Aporia · A famed Hawaii sea arch collapses, prompting NPS warnings of unstable cliffs

A large sea arch known as Holei Sea Arch in Hawaii Volcanoes National Park on Hawaii's Big Island has collapsed, standing at approximately 90 feet high before its fall between September 23 and September 27. The National Park Service attributes the collapse to potential instability caused by Tropical Storm Nolo during a park closure period and is now warning visitors about unstable cliffs in the area.

Written locally by qwen2.5:14b on 2026-10-03, using this article's own text rather than the other coverage of the same event (that is the story summary below).

Story summary

The Hōlei Sea Arch, a 550-year-old lava rock formation standing at approximately 90 feet tall in Hawaii Volcanoes National Park on the Big Island, collapsed into the Pacific Ocean sometime between September 23 and September 27, likely during Tropical Storm Nolo. The arch was still visible as of September 23 but had disappeared by September 27 when the park reopened. This collapse marks a significant loss to the region's natural wonders and tourist attractions, with thousands of people expressing grief on social media platforms like Facebook and Google Maps marking it as "permanently closed." Despite its beauty, experts warned that the arch's instability was anticipated due to ongoing erosion from waves and earthquakes caused by the 2018 Kīlauea volcano eruption. The National Park Service has issued warnings about unstable cliffs near the former site of the sea arch, urging visitors to stay back for safety reasons.

Written for “Holei Sea Arch Collapse” on 2026-10-04, grounded in this article and the 7 other(s) covering the same event.

📰 Holei Sea Arch Collapse

Environment · 8 article(s) covering the same event. See how they differ ↓

Article leaning vs. publisher reliability

Source leaning vs. consistency

This article reads unscored and hedges 50% of its claims. Each row says how that neighbour differs.

Hawaii sea arch collapses into Pacific Ocean after storms batter island state same event · 100%

CBS News · 0.97 cosine similarity

⚖️ leaning not scored 🔴 9% hedged 1 of 11 📰 publisher trust 66

“Both articles describe the collapse of the Holei Sea Arch in Hawaii Volcanoes National Park between Sept. 23 and Sept. 27, likely during Tropical Storm Nolo.”

Hawaii's famed Hōlei Sea Arch landmark collapses into ocean after 500 years same event · 100%

Daily Mail · 0.92 cosine similarity

⚖️ leaning not scored 🔴 10% hedged 2 of 21 📰 publisher trust 65

“Both articles describe the collapse of Hawaii's Hōlei Sea Arch within the same timeframe and location.”

Hawaii’s picturesque Hōlei Sea Arch collapses into the ocean same event · 100%

NBC News · 0.91 cosine similarity

⚖️ leaning not scored 🔴 17% hedged 2 of 12 📰 publisher trust 95

“Both articles describe the collapse of the Hōlei Sea Arch in Hawaii Volcanoes National Park between September 23 and September 27, 2026, during Tropical Storm Nolo.”

Hawaii’s centuries-old sea arch collapses into Pacific after series of rough storms same event · 100%

The Guardian · 0.90 cosine similarity

⚖️ leaning not scored 🔴 0% hedged 0 of 16 📰 publisher trust 60

“Both articles describe the collapse of the Hōlei sea arch in Hawaii Volcanoes National Park following rough storms, with similar details about its height and timing.”

Hawaii's iconic 550-year-old Hōlei Sea Arch collapses same event · 100%

BBC News · 0.89 cosine similarity

⚖️ leaning not scored 🔴 0% hedged 0 of 15 📰 publisher trust 78

“Both articles describe the collapse of the Hōlei Sea Arch in Hawaii Volcanoes National Park, specifying it occurred between September 23 and September 27, 2026.”

Famed Hawaii tourist attraction collapses into the sea amid unstable cliff warning same event · 100%

The Independent

⚖️ leaning not scored 🔴 12% hedged 2 of 16 📰 publisher trust 59

“Both articles describe the collapse of the Holei Sea Arch in Hawaii Volcanoes National Park between September 23 and September 27, 2026.”

The Holei Sea Arch, a centuries-old Hawaii wonder, crumbles into the Pacific same event · 95%

The Straits Times · 0.90 cosine similarity

⚖️ leaning not scored 🔴 18% hedged 3 of 17 📰 publisher trust 59

“Both articles describe the collapse of the Holei Sea Arch in Hawaii Volcanoes National Park at the same time and place, around late September during Tropical Storm Nolo.”

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Hawaii Tropical Storm Nolo the National Park Service

Hawaii GPE · 2× the National Park Service ORG · 1×

A scenic cliff on the wave-swept coast of Hawaii’s Big Island has collapsed, the National Park Service said.

framing: mixed · carried by 1 article(s) · first seen 2026-10-03

2026-10-03 · Toronto Star

A famed Hawaii sea arch collapses, prompting NPS warnings of unstable cliffs · mixed framing

A scenic cliff on the wave-swept coast of Hawaii’s Big Island has collapsed, the National Park Service said. asserted

Service → sweep → Island

The Holei Sea Arch, located in the Hawaii Volcanoes National Park, was about 90 feet (27.4 meters) high before it collapsed sometime between Sept. 23 and Sept. 27, possibly when the park was temporarily closed during Tropical Storm Nolo. uncertain

park → locate → Nolo

A famed Hawaii sea arch collapses, prompting NPS warnings of unstable cliffs

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