In 1992, an underground nuclear test at the Chinese Lop Nur site was monitored by U.S. seismographs that recorded unusual reflected waves from a region of the eastern Alaska Range approximately fifty miles west of Mount Hayes. The reflection pattern, according to Linda Moulton Howe and a retired Air Force official who claimed to have worked on the data, suggested a regular three-sided structure larger than the Great Pyramid of Giza buried beneath the ice. No peer-reviewed paper confirms the existence of the anomaly, and the United States Geological Survey has no record of any investigation into the region; but hunters and bush pilots working the northern slope of the Alaska Range report persistent and severe compass deviations, unexplained nighttime glows, and airborne electronics failures across a roughly 50-mile-wide band.

The 'Alaska Pyramid' story was first popularized by alternative-news journalist Doug Mutschler on an Anchorage radio program in 1992, then picked up by Howe and others. The Department of Defense has repeatedly denied the structure's existence. However, the eastern Alaska Range is also the location of HAARP (the High-frequency Active Auroral Research Program) at Gakona, which has drawn its own conspiracy literature. The underlying geology is legitimately unusual: the area sits on the Denali Fault, one of the most active strike-slip systems in North America, and seismic reflectors in ultramafic terrane can genuinely produce strong multi-path returns.

Indigenous Ahtna Athabaskan traditions describe the Alaska Range's interior as a territory of powerful earth spirits and 'places where the compass forgets.' Whether the Alaska Pyramid is a seismic ghost, a classified underground installation, a buried feature of ancient geology, or purely modern folklore, the region remains one of the least-explored large terrains on the North American continent. Several well-documented plane losses inside the band — including a 1979 C-130H test flight and a 1999 Cessna Caravan carrying six — have amplified the pyramid legend among Alaskans.

Mount Hayes electromagnetic anomaly — the 'pyramid' beneath the Alaska Range

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Discussion

Nightmarks in the Region

Japan Air Lines Flight 1628 UFO encounter — the mothership that tracked a 747 over Alaska (1986)

Unidentified object observed at Ladd AFB near Fairbanks, Alaska (1952)

Second Blue Book unknown at Ladd AFB near the Arctic Circle, Alaska (1951)

Unidentified object observed at Cold Bay AFS on the Aleutian Islands, Alaska (1966)

Unidentified object observed over Alaska by military personnel (1950)

The Alaska Triangle — 20,000 vanished in an unexplained vortex of the last frontier