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 Virgo detectors have begun the second half of the fourth observing run, known as O4b, as of April 10, 2024. The entry of the KAGRA detector into O4b has been postponed in order to continue detector commissioning activities and further increase the sensitivity of the detector. All detectors are planned to rejoin O4 by the end of the run. 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.