We are excited to announce that our next observing run (O4) is scheduled to begin late May!

We will observe for 18 months!@LIGOWA @LIGOLA @ego_virgo & @KAGRA_PR will run together!

Expect many #GraivtationalWaves!

Observing plan: https://t.co/CyWp70H1if#O4IsComing pic.twitter.com/BBskyganyj

— LIGO (@LIGO) February 2, 2023