Skip to main content



LIGO Suspends Third Observing Run (O3)

LIGO and Virgo will suspend the O3 run on 27 Mar 2020 at 17:00 UTC. It is unknown at this time whether observing mode operation may resume in the near future, as the current worldwide COVID-19 pandemic demands that we make public health and safety our top priority.The LIGO Laboratory, LIGO Scientific Collaboration, EGO, and Virgo Collaboration leadership are working to ensure that the transition out of O3 is smooth and preserves the potential science to be conducted with LIGO-Virgo data. In particular, this means rapidly carrying out critical detector measurements and calibrations needed to ensure O3b data integrity and quality. The remaining days of the run will have some time set aside for these measurements and to complete the transition.Design and contracting activities associated with LIGO detector upgrades will continue. At this point, it is impossible to say how COVID-19 might affect the planned LIGO A+ upgrade, beyond noting that there are indeed likely impacts. LIGO Scientifi…

Latest Posts

LIGO Laboratory's response to COVID-19

Public events canceled at LIGO observatories

KAGRA Gravitational-wave Telescope Begins Observations

Kip S. Thorne to Receive Princeton's Madison Medal

LIGO-Virgo Network Catches Another Neutron Star Collision

Rana Adhikari Designs the Future of Gravitational-Wave Detectors

Episode 9 of the LIGO Documentary Released

New instrument extends LIGO’s reach

Winner of the 2019 Award for Excellence in Detector Characterization and Calibration Announced

2020 Caltech LIGO SURF Program Announced