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 Advanced Virgo detectors have finished the third observing run, known as O3, as of March 27, 2020. The detectors are currently undergoing upgrades in preparation for the fourth observing run. Summaries of previous observing runs are available in the menu above. For overviews of LIGO and Virgo observing runs, see the arXiv:1304.0670.