Please select a date from the calendar above to see archived or current status.
Information is available for dates after November 30, 2016.
The Advanced LIGO and KAGRA detectors have completed the first half of the fourth observing run, known as O4,
as of January 16, 2024.
The entry of the Advanced Virgo detector into O4 has been postponed in order to continue detector commissioning activities and further increase the sensitivity of the detector.
All detectors are planned to join the second half of O4, which will begin later this spring.
Summaries of the current observing run and previous observing runs are available in the
menu above. For overviews of LIGO, Virgo, and KAGRA observing runs, see the
arXiv:1304.0670.
