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Lightning prediction

29.06.2019

Scientists from the University of Tokyo have discovered a link between lightning strikes and two types of gamma radiation in thunderclouds.

A new study shows that under certain conditions, weak gamma rays from thunderclouds can precede lightning strikes and their accompanying gamma-ray bursts. There are two known types of gamma-ray phenomena associated with thunderclouds: gamma rays (weak radiation that lasts about a minute) and short-term terrestrial gamma-ray flashes that we observe in the form of lightning strikes.

Both types take place in thunderclouds sandwiched between layers of variable charge. The charged regions accelerate the electrons to almost the speed of light, after which the electrons slow down slightly and emit a gamma ray. This is called bremsstrahlung.

The monitoring system allowed Japanese experts to detect simultaneous terrestrial gamma-ray flashes and lightning strikes. This is a fairly common phenomenon, but observations have also made it possible to detect gamma rays in the same area and at the same time. Scientists also noticed that after a lightning strike, the glow suddenly disappeared. This allows us to make the final conclusion that these events are closely related, and evidence for this was observed for the first time.

The research could hold the key to developing previously unknown ways to predict lightning. The team of experts intends to explore the possibility that the glow of gamma rays not only precedes lightning strikes, but may actually cause them.

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