They are called Miyake events after the lead author of the first study about such an event, detected in 1,200-year-old tree rings. The spikes in radiation turn up in isotopes of carbon, ...

A history written in tree rings. When high-energy radiation strikes the upper atmosphere it turns nitrogen atoms into radioactive carbon-14, or radiocarbon.

The radiation burst, which seems to have hit between ad 774 and ad 775, was detected by looking at the amounts of the radioactive isotope carbon-14 in tree rings that formed during the ad 775 ...

Over the years, tree ring data from around the world has shown evidence of several unexplained and potentially devastating space weather events that delivered a dose of radiation to Earth and many ...

Tree rings can preserve a snapshot of the Earth throughout the tree's life. Now Australian scientists analyzing these records have found evidence of huge radiation storms that periodically bathe ...

University of Queensland. (2022, October 25). Tree rings offer insight into devastating radiation storms. ScienceDaily. Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2022 / 10 ...

“When radiation strikes the atmosphere it produces radioactive carbon-14, which filters through the air, oceans, plants, and animals, and produces an annual record of radiation in tree rings.

“When radiation strikes the atmosphere it produces radioactive carbon-14, which filters through the air, oceans, plants, and animals, and produces an annual record of radiation in tree rings ...

A spike in rare chemicals recorded in tree rings from 775 A.D. may have been caused by a space explosion called a gamma-ray burst, according to a new study.

However, the unusually high levels of the radioactive isotope carbon-14 found in tree-rings laid down during the radiation bursts could help reliably pinpoint dates. The distinct spikes act as ...

Ancient radioactive tree rings, writes Don Lincoln. Geoscientist Robert Brakenridge, ... Carbon-14 is naturally produced in the Earth’s upper atmosphere by radiation from the sun.

We analyzed radioactive signatures left in tree rings around the world to study mysterious “radiation storms” that have swept Earth half a dozen times in the past 10,000 years or so. Our results, ...