It's called in-cloud or cloud-to-cloud lightning.
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When lightning strikes within one cloud, it is called intra-cloud lightning. This type of lightning occurs between positive and negative charges within the same cloud, rather than between different clouds or between a cloud and the ground.
Most lightning events are intracloud (IC) or cloud to cloud (CC), occurring high in the atmosphere.
It's called in-cloud or cloud-to-cloud lightning.
Cloud-to-cloud lightning is commonly referred to as intracloud lightning because it occurs entirely within the same cloud without reaching the ground.
A type of lightning that appears as a single long line is called a "fork lightning" or "bolt from the blue." It often occurs when lightning strikes horizontally within a cloud or between clouds rather than toward the ground.
Positive lightning strikes are less common but more powerful and dangerous than negative lightning strikes. Positive strikes originate from the top of a thunderstorm cloud and can travel long distances, causing more damage and posing a greater risk to people and structures. Negative strikes, on the other hand, are more common and typically originate from the lower part of a cloud.
There are approximately 1.4 billion lightning strikes worldwide each year. Lightning is a natural electrical discharge during a thunderstorm, and it occurs when different charges within a storm cloud separate. Lightning can be dangerous and cause damage, so it's important to stay safe during thunderstorms.