CASE FILE US-2023-001

PRC High-Altitude Balloon Transit and Shootdown

Jan–Feb 2023 · Atlantic Ocean off Myrtle Beach, South Carolina · Location generalized (Approximate) · US

Official finding

People's Republic of China (PRC) high-altitude surveillance balloon

U.S. Department of Defense / NORAD

F-22 Safely Shoots Down Chinese Spy Balloon Off South Carolina Coast

Anomaly Index assessment

Identified

U.S. defense and intelligence officials, backed by continuous NORAD tracking, recovered physical debris, and sworn congressional testimony, consistently identified the object as a PRC government high-altitude surveillance balloon carrying a steerable sensor and antenna payload. The object was tracked from its entry over Alaska on 28 January 2023 through its shootdown off South Carolina on 4 February 2023, leaving little ambiguity about its nature even though China disputes the U.S. characterization of its purpose.

Anomaly Index assessments are editorial evaluations of the public record. They are not official government determinations.

What was reported

A high-altitude balloon entered U.S. airspace over Alaska on 28 January 2023, crossed into Canadian airspace, then re-entered the continental United States over Idaho on 31 January. NORAD tracked the balloon continuously as it drifted eastward at an altitude well above commercial air traffic. On 2 February, a senior defense official told reporters the U.S. government had "very high confidence" the balloon belonged to the People's Republic of China, and that its flight path had carried it over sensitive sites, including Montana, home to one of the nation's three Minuteman III missile silo fields. Defense officials described the balloon as roughly 200 feet tall with a jetliner-sized payload weighing more than 2,000 pounds, equipped with multiple antennas and solar panels, and capable of limited self-steering — loitering, slowing, and speeding up rather than drifting passively with the wind. President Biden ordered it downed once it could be done safely over water. On 4 February, an F-22 Raptor based at Joint Base Langley-Eustis fired a single AIM-9X Sidewinder missile at approximately 58,000 feet, striking the balloon and sending it into the Atlantic Ocean roughly six miles off Myrtle Beach, South Carolina. The Navy and Coast Guard recovered debris from the seafloor in the following days, which was sent to the FBI Laboratory in Quantico, Virginia, for analysis. China's government maintained the balloon was a civilian meteorological research airship blown off course by winds beyond its limited steering capability.

What is verified

A high-altitude balloon entered U.S. airspace over Alaska on 28 January 2023 and was tracked across the continental United States before being shot down by a U.S. Air Force F-22 off Myrtle Beach, South Carolina, on 4 February 2023.[2]
NORAD and Department of Defense officials assessed the balloon as a People's Republic of China government high-altitude surveillance balloon carrying a maneuverable payload with multiple antennas and solar panels.[1]
A senior defense official stated on 2 February 2023 that the balloon's flight path took it over sensitive sites, including Montana's Minuteman III missile silo field.[3]
An F-22 fired an AIM-9X Sidewinder missile that downed the balloon over U.S. territorial waters; debris was recovered and sent to the FBI Laboratory in Quantico, Virginia, for analysis.[2]

Evidence ledger

Evidence items documenting this case
Type	Description	Originality	Source organization	Released	Raw or edited	Metadata	Provenance	Known limitations	Source
Radar	Continuous NORAD tracking of the balloon's flight path from Alaska through the continental United States to the shootdown site off South Carolina.	Original	North American Aerospace Defense Command	Described in official statements and congressional testimony, February 2023	Unknown	Partial	Official U.S. and Canadian military tracking, described publicly by NORAD and DoD officials.	Raw tracking data itself has not been released; the public record consists of official summaries and briefings rather than the underlying radar track file.	[1]
Official document	Department of Defense statements and a senior defense official background briefing describing the balloon's identification, flight path, and the decision to shoot it down.	Original	U.S. Department of Defense	2023-02-02 to 2023-02-04	Raw	Yes	Official DoD press statements and an on-the-record background briefing.	Briefings are attributed to an unnamed "senior defense official" rather than a named, on-record source for some details, including the Montana overflight.	[3]
Physical trace or material	Balloon and payload debris recovered from the Atlantic Ocean off Myrtle Beach, South Carolina, and analyzed by the FBI Laboratory.	Original	U.S. Navy, U.S. Coast Guard, and Federal Bureau of Investigation	Recovery operations February 2023; analysis results not fully public	Unknown	Partial	Physical recovery operation described in official DoD statements; analysis conducted by the FBI Laboratory.	Full forensic analysis results of the payload have not been made public in detail.	[2]

Proposed explanations

PRC government high-altitude surveillance balloon

Proposed by U.S. Department of Defense and NORAD (official assessment)

Supporting: NORAD tracked the balloon's flight path and its ability to loiter, slow, and speed up; recovered payload included multiple antennas and equipment consistent with intelligence collection; senior defense officials stated "very high confidence" it was a PRC balloon that flew over sensitive sites, including Montana's missile silo field.

Contradicting: China's government stated the balloon was a civilian meteorological research airship blown off its intended course; no independent verification of China's competing account has been made public.

Supported

Civilian weather/research balloon blown off course

Proposed by People's Republic of China Ministry of Foreign Affairs

Supporting: Chinese officials described the balloon as intended mainly for meteorological research, with limited self-steering capability, and said it deviated from its planned course due to winds.

Contradicting: U.S. officials noted the balloon's large size (roughly 200 feet tall, payload over 2,000 pounds), demonstrated ability to maneuver and loiter rather than drift passively, and recovered debris including solar panels and multiple antenna arrays inconsistent with typical weather-balloon instrumentation.

Rejected

Why this classification?

This case is classified as Identified because U.S. defense and intelligence officials, backed by continuous NORAD tracking, physical debris recovery, and sworn congressional testimony, directly and consistently identified the object as a PRC government high-altitude surveillance balloon carrying a sensor and antenna payload. The object's flight was tracked from its entry over Alaska on 28 January 2023 through its shootdown off South Carolina on 4 February 2023, leaving little ambiguity about its nature even though China disputes the U.S. characterization of its purpose.

What remains unknown

The full technical capabilities and specific intelligence targets of the balloon's sensor payload, pending complete public release of the FBI Laboratory's analysis of recovered debris.
Whether the balloon transmitted collected data in real time or stored it for later retrieval.
Why the balloon was allowed to complete its cross-country transit before being downed, rather than being intercepted earlier over less populated areas.

Classification history

2023
Identified: PRC high-altitude surveillance balloon — U.S. Department of Defense / NORAD
Announced in a series of statements and briefings between February 2 and February 4, 2023, culminating in the shootdown.
2023
Identification affirmed in sworn testimony — U.S. Senate Committee on Appropriations
Feb. 9, 2023 hearing, "The People's Republic of China's High Altitude Surveillance Efforts Against the United States."
2026
Identified — Anomaly Index

Sources

Primary source: Tier A
"The People's Republic of China's High Altitude Surveillance Efforts Against the United States" (S.Hrg. 118-183) (opens in new tab)U.S. Senate Committee on Appropriations, Subcommittee on Defense · 2023-02-09 · archived copy (opens in new tab)
Source provenance note
Testimony of Hon. Melissa Dalton (Assistant Secretary of Defense for Homeland Defense and Hemispheric Affairs), Lt. Gen. Douglas Sims II (Director for Operations, Joint Staff), Jedidiah Royal, and Vice Adm. Sara Joyner before the Senate Appropriations Subcommittee on Defense, chaired by Sen. Jon Tester. Confirms the balloon's timeline (entered Alaska airspace Jan. 28, continental U.S. airspace Jan. 31, downed Feb. 4 approximately six miles off South Carolina) and describes it as roughly 200 feet tall with a jetliner-sized payload, distinct from a weather balloon. Fetched and read directly; govinfo.gov content confirmed.
Primary source: Tier A
F-22 Safely Shoots Down Chinese Spy Balloon Off South Carolina Coast (opens in new tab)U.S. Department of Defense (redesignated U.S. Department of War) · 2023-02-04 · archived copy (opens in new tab)
Source provenance note
Official statement confirming a U.S. Air Force F-22 Raptor, on presidential order and under NORTHCOM/NORAD authority, downed a People's Republic of China high-altitude surveillance balloon over U.S. territorial waters off Myrtle Beach, South Carolina, using an AIM-9X Sidewinder missile fired from roughly 58,000 feet; debris was recovered for FBI laboratory analysis. Direct fetch returned HTTP 403 (bot protection common to defense.gov/war.gov and other .mil domains); the identical release is independently mirrored, with matching titles and article IDs, across af.mil, spaceforce.mil, acc.af.mil, and afrc.af.mil, and its factual content is corroborated by sworn Feb. 9, 2023 Senate Appropriations testimony (src-balloon-senate-appropriations-hearing-2023).
Primary source: Tier A
Senior Defense Official Holds a Background Briefing on High-Altitude Surveillance Balloon (opens in new tab)U.S. Department of Defense · 2023-02-02 · archived copy (opens in new tab)
Source provenance note
Background briefing in which a senior defense official stated the U.S. government had "very high confidence" the high-altitude balloon detected over the continental United States belonged to the People's Republic of China, and confirmed its flight path took it over sensitive sites, including Montana — home to one of the three U.S. Minuteman III missile silo fields. Direct fetch returned HTTP 403 (bot protection common to defense.gov/war.gov); content corroborated by contemporaneous reporting (CNN, NBC News, and local Montana outlets covering the same briefing).