Observing Plans

Current Observing Plans

January 16, 2024 -- The first half of O4 (O4a) ended on January 16th when LIGO entered its scheduled O4 maintenance and commissioning break, which is expected to last approximately 8 weeks. The second half of the run is currently expected to begin on March 27, 2024 following a 2-week engineering run.

For more information, please see:

LIGO/Virgo/KAGRA Statement on Near-term Observing Plans


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.

LIGO Laboratory Statement on Long-term Future Observing Plans