The 1947 Sikhote-Alin Fall

On February 12, 1947, a massive iron meteoroid entered Earth’s atmosphere over the Sikhote-Alin Mountains in eastern Siberia.

The event was witnessed across a vast region and produced one of the most spectacular meteorite falls ever recorded in modern history.

A brilliant fireball crossed the sky before the meteoroid fragmented violently, generating powerful shock waves and a large strewn field covering several square kilometers.

A Catastrophic Atmospheric Fragmentation

Unlike many iron meteorites recovered as ancient finds, Sikhote-Alin is a witnessed fall, meaning its atmospheric behavior and recovery are historically documented.

The original iron body fragmented explosively during atmospheric entry, producing:

• Complete oriented individuals
• Shrapnel-like fragments
• Deeply sculpted atmospheric forms
• Impact craters within the strewn field

This violent fragmentation explains the remarkable diversity of Sikhote-Alin specimens found today.

Regmaglypts and Atmospheric Sculpting

Sikhote-Alin specimens are particularly famous for their spectacular regmaglypts, the thumbprint-like depressions formed during atmospheric ablation.

Many individuals display exceptional aerodynamic sculpting, including:

• Deep regmaglypts
• Flow structures
• Flanged forms
• Heat-shield characteristics

These features provide a direct record of the interaction between molten metal and turbulent airflow during atmospheric entry.

Shrapnel vs Individual Specimens

Sikhote-Alin meteorites are commonly divided into two major categories:

• Individuals — complete meteorites sculpted during atmospheric flight
• Shrapnel — angular fragments produced by explosive breakup

Complete individuals are generally the most desirable for collectors due to their atmospheric forms and sculptural appearance.

Composition and Classification

Sikhote-Alin is classified as a coarse octahedrite iron meteorite belonging to chemical group IIAB.

Its composition is dominated by iron-nickel metal containing kamacite and taenite structures typical of iron meteorites.

When cut and etched, some specimens reveal classic Widmanstätten patterns.

Scientific Importance

Sikhote-Alin remains one of the most important meteorites for studying:

• Atmospheric fragmentation of iron meteoroids
• Ablation processes
• Impact crater formation
• Iron meteorite structures

The exceptional documentation of the fall provides researchers with valuable observational data rarely available for iron meteorites.

Collector Interest

Sikhote-Alin is among the most collected and recognizable iron meteorites in the world.

Collectors particularly value:

• Large sculptural individuals
• Deep regmaglypts
• Complete oriented specimens
• Historic provenance linked to the witnessed fall

Exceptional Sikhote-Alin individuals combine scientific importance, historical significance, and extraordinary aesthetic appeal.

Available Specimens

The specimens presented in this category include selected Sikhote-Alin meteorites displaying a wide variety of atmospheric forms and regmaglypt sculpting.

FAQ

What is Sikhote-Alin?

Sikhote-Alin is a famous iron meteorite that fell in Siberia in 1947.

Why is Sikhote-Alin important?

It is one of the best documented iron meteorite falls in history.

What are Sikhote-Alin regmaglypts?

They are thumbprint-like depressions formed during atmospheric ablation.

What is the difference between Sikhote-Alin individuals and shrapnel?

Individuals are complete atmospheric forms, while shrapnel fragments resulted from explosive breakup.

Is Sikhote-Alin rare?

Well-preserved sculptural individuals and oriented specimens are highly sought after by collectors.