# Mount Vesuvius eruption used for geological dating

> Live situation record from CLSTR: https://clstr.news/situations/mount-vesuvius-eruption-used-for-geological-dating
> Updated: 2026-09-30T10:55:59.000Z. Sources: 8. Developments: 2.

Researchers from the Berkeley Geochronology Center and the University of Padua are utilizing the historical 79 CE eruption of Mount Vesuvius to refine the precision of argon-argon dating. By using eyewitness accounts from Pliny the Younger as a benchmark, scientists have been able to calibrate radioactive dating methods with high accuracy.

By analyzing sanidine minerals from the eruption, the team achieved a precision of 0.7% and an accuracy of 0.4% relative to the historical date. This breakthrough, published in Science Advances, provides a nearly twofold improvement in the precision of the potassium-40 decay constant. The refined method is expected to assist geologists, paleontologists, and archaeologists in establishing more reliable chronologies for major geological events, such as mass extinctions, asteroid impacts, and volcanic activity in populated regions.

## Timeline

### 2026-09-30: Mount Vesuvius eruption helps scientists refine geological dating

Scientists are using the historical 79 CE eruption of Mount Vesuvius to refine argon-argon dating, improving the precision of geological timelines for volcanic events and mass extinctions.

2 sources. https://clstr.news/cluster/mount-vesuvius-eruption-helps-scientists-refine-geological-dating

### 2026-09-26: Mount Vesuvius eruption used to improve geological dating precision

Scientists have used the historical 79 CE eruption of Mount Vesuvius to recalibrate argon-argon dating, significantly increasing the precision of geological and archaeological timelines.

6 sources. https://clstr.news/cluster/vesuvius-eruption-used-to-refine-volcanic-dating-precision

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Cite as: Mount Vesuvius eruption used for geological dating. CLSTR, https://clstr.news/situations/mount-vesuvius-eruption-used-for-geological-dating