Korean Peninsula Night Lights: A Satellite Map (June 2026)

About This Chart

Data Visualization Method

• Data: Nighttime radiance from the VIIRS Day/Night Band aboard the Suomi-NPP satellite (NASA Black Marble VNP46A2, Collection 2). Only the same-day, non-gap-filled retrieval was used, so the values reflect observed light, not modeled or backfilled estimates.
• Period and area: A single night centered on 27 June 2026, covering the Korean Peninsula and parts of neighboring China, Japan, and Russia. Land cells with no usable reading that night were filled from 26 June, then 28 June; remaining gaps were left empty.
• Selection: Each pixel had to pass strict quality checks — a clear night with no cloud, cirrus, snow, or shadow. Points below 0.25 nW·cm⁻²·sr⁻¹ were dropped, all sea points removed, and isolated faint pixels and block-shaped artifacts cleaned out.
• Processing: Roughly 500 m source pixels were averaged into 1 km equal-area grid cells — a mean of the quality-valid pixels, not a maximum or brightest-pixel pick. Country labels come from Natural Earth boundaries.
• Chart form: A point map over a dark base map, where each point's brightness follows its radiance band. An animated twinkle sits on top as a visual layer; the map itself is a single-night snapshot, not a time series.

Creator's Note

The night-lights contrast across the divided peninsula is usually shown with older satellite composites.

This chart was built to see that same contrast on a current, single clear-sky night, rendered through one consistent method rather than stitched from many dates. That meant tracking recent nights and choosing one where observation over the peninsula was unusually clean.

Under identical processing, the southern half reads as far wider and stronger in nighttime light than the northern half. That difference is a signal about lighting infrastructure and how a landscape is lit, not a scorecard — where a single border runs, one continuous piece of land resolves into two very different night signatures.

Data Sources

• NASA Black Marble VNP46A2 (Collection 2) — Suomi-NPP VIIRS Day/Night Band nighttime radiance, distributed by NASA LAADS DAAC; the source of every land light point.
• Product DOI — the citable reference for this exact dataset version.
• Natural Earth — 1:10m boundaries used to classify each point by country.

Limitations

This is a single night, so it is more sensitive to weather and one-off activity than a long-term average. Clouds, snow, viewing angle, and quality filtering all shape how much of a region can be seen.

Observation coverage varies sharply here — from most of South Korea and North Korea down to only a small share of Russia. Where coverage is low, an area can look sparse simply because few cells were observable, not because it is truly dark.

The weak-light cleaning is a conservative visualization choice, not a classifier that proves which pixels are "real" light. The number of displayed points reflects area, coverage, and these rules — it is not a country ranking.

Brightness is an indirect indicator. It is not the same as population, GDP, or electricity use; it also depends on fixtures, the shift to LED, lighting policy, industry, roads, and season. Black Marble corrections reduce interference but do not remove all uncertainty.

What This Chart Doesn't Show

The twinkle animation is a visual effect made by duplicating some static points; it is not flicker recorded by the satellite. Only the static base layer is data.

Observation gaps are not zero. The unobserved share of North Korea should not be read as darkness, or as an absence of people or electricity.

Sea lights — ships, anchorages, offshore facilities — were deliberately removed and do not appear, even though the raw product can contain them. And no cause behind the lights, whether wealth, energy use, or governance, can be read directly from this map.