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 begun the fourth observing run, known as O4, as of May 24, 2023. 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. 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.