TNPSC Thervupettagam

Double Cicada Explosion

January 20 , 2024 181 days 1078 0
  • A double cicada emergence is on the cards this year, a rarity that is happening after 221 years.
  • Two broods of cicadas will explode from the ground at the same time: Brood XIII and Brood XIX.
  • Typically, the insects emerge from underground every 13 or 17 years, depending on the brood.
  • But this year, both these broods will emerge together.
  • This rare joint explosion of cicadas last happened in the year 1803, the year the Louisiana Purchase was made.
  • Its next occurrence will happen only 421 years later.
  • Cicadas are insects that spend the early stages of their lives underground.
  • Once fully grown, they emerge in millions for food and to mate.
  • While Brood XIX of cicadas emerges once every 13 years, Brood XIII explodes from the ground every 17 years. 

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