Current Observing Plans
The joint running plan for LIGO, Virgo, and KAGRA is updated periodically as the instruments are commissioned. At present (January 2023), we expect O4 to commence in May, 2023, immediately following a month-long joint engineering run with Virgo and KAGRA. For more information, please see:
Future Observing Plans
Plans are currently under development by LIGO to chart a path for interferometer upgrades and observing periods beyond O5 and continuing into the next decade.