---
title: "Operation Argus conducted three high-altitude nuclear tests in 1958"
url: "https://usubjects.com/article/operation-argus-conducted-three-high-altitude-nuclear-tests-in-1958-3801"
updated: "2026-09-28T16:03:05.995Z"
description: "The post distinguishes unverified claims that the U.S. military has used EMP weapons to disable and recover UFOs from the documented 1958 Operation Argus tests. Those tests involved three clandestine high-altitude nuclear detonations over the South Atlantic on August 27, August 30, and September 6, conducted to study EMP-like effects; the excerpt provides no evidence linking them to UFO retrieval or concealment from Congress."
sources: ["https://www.govinfo.gov/content/pkg/GOVPUB-D15-PURL-gpo222813/pdf/GOVPUB-D15-PURL-gpo222813.pdf"]
licence: "All rights reserved"
---

# Operation Argus conducted three high-altitude nuclear tests in 1958

Published: 2026-09-28  
Source: [r/ufo](https://www.govinfo.gov/content/pkg/GOVPUB-D15-PURL-gpo222813/pdf/GOVPUB-D15-PURL-gpo222813.pdf)

### Overview

A declassified Defense Nuclear Agency report documents **Operation Argus**, a secret U.S. military program involving three high-altitude nuclear detonations over the South Atlantic in 1958. The tests took place on **August 27, August 30, and September 6**, during the early years of the space age, when scientists and defense planners were studying how nuclear explosions might affect Earth’s upper atmosphere, radio communications and spacecraft.

The report, *Operation Argus 1958*, was prepared by Kaman Tempo and associated researchers and dated **April 30, 1982**. It was issued as an unclassified technical report and approved for public release with unlimited distribution. The document was later made available through the U.S. government’s GovInfo archive.

### The Operation

Operation Argus was conducted by **U.S. Navy Task Force 88**, which consisted of nine ships and approximately 4,500 personnel. The task force operated in the South Atlantic, using the missile trials ship **USS Norton Sound (AVM-1)** as the launch platform. For each test, the ship launched a specially modified **X-17A three-stage ballistic missile** carrying a low-yield nuclear warhead.

The warheads were detonated at high altitude in the upper atmosphere. The report describes the operation as a clandestine effort, reflecting the sensitivity of nuclear testing and the military interest in atmospheric effects during the Cold War. Following the final launch on September 6, the task force departed the South Atlantic for Rio de Janeiro before returning personnel and equipment to U.S. home ports.

### Scientific and Military Objectives

The tests were designed primarily to examine the **Christofilos theory**, which proposed that a high-altitude nuclear explosion could produce an artificial radiation belt around Earth. Such a belt might affect radio and radar transmissions, damage the arming and fuzing systems of intercontinental ballistic missile warheads, and pose risks to crews aboard orbiting spacecraft.

The source also identifies the “ARGUS effect” among the operation’s technical subjects, along with the Van Allen radiation belts and related defense research. These objectives placed Operation Argus within a broader effort to understand the military consequences of nuclear detonations beyond the atmosphere. The tests were not conventional surface explosions; their purpose was to study interactions between nuclear energy, charged particles and Earth’s magnetic environment.

### UFO Claims and the Historical Record

Online discussions sometimes present Operation Argus as evidence that the U.S. military used electromagnetic-pulse weapons to disable unidentified flying objects and recover them. **The supplied report does not support those claims.** It documents nuclear tests intended to investigate radiation belts and related atmospheric and space effects, but it contains no evidence linking the detonations to UFO retrievals, alleged recovered craft or a program to conceal such activity from Congress.

The report’s emphasis is instead on test operations, scientific effects and radiological safety. Its abstract states that the document details Defense Department personnel participation, “with an emphasis on radiological safety.” That focus is consistent with the formal record of a nuclear weapons effects study and does not substantiate later speculative interpretations.

### Historical Context

Operation Argus remains significant because it demonstrated the United States’ willingness to conduct nuclear experiments at extreme altitude during a period of rapid technological competition. The tests contributed to understanding artificial radiation environments and helped inform assessments of their potential effects on communications, missiles and human spaceflight.

At the same time, the operation should be separated from unsupported narratives about UFO-related military actions. **The available government documentation establishes that three high-altitude nuclear tests occurred; it does not establish that they were intended to disable or recover unidentified aircraft.**

## Provenance

This USUBJECTS page is a summary or digest of the linked original source. Any accompanying generated visual is an illustrative reconstruction, not evidence.