Previous Observing Runs
Gravitational-Wave Observatory Status
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 KAGRA and GEO600 detectors also finished their most recent observing run, known as O3GK, as of April 21, 2020. The detectors are currently undergoing upgrades in preparation for the fourth observing run that will include the Advanced LIGO, Advanced Virgo, and KAGRA detectors. Summaries of previous observing runs are available in the menu above. For overviews of LIGO, Virgo, and KAGRA observing runs, see the
Today's Summary Page
Current Status (GWISTAT)
LIGO/Virgo Alerts (GraceDB)
European Gravitational Observatory